Answers on prices, call outs and gas safety in London
Neos Engineering is a Gas Safe registered plumbing, heating and drainage firm based in Camden, NW1, working for businesses across all of London and for homes anywhere inside the M25. A call out at a business costs £150 + VAT an hour per engineer, and at a home £110 + VAT (£132 inc VAT), 8am to 5pm, Monday to Friday.
Does Neos Engineering work for landlords, letting agents and block managers?
Neos Engineering works for facilities management companies, property management companies, block managers, commercial kitchens, landlords and letting agents, as well as households.
The work covers plant rooms and communal heating, plumbing, drainage, and gas safety certificates for one rented home or many. A rented home is charged at the home rate, not the business rate; hourly work starts from £110 + VAT (£132 inc VAT) an hour per engineer, 8am to 5pm, Monday to Friday.
How much does a commercial plumber cost per hour in London?
Neos Engineering charges £150 + VAT an hour per engineer for commercial work in London, 8am to 5pm, Monday to Friday.
At any other time, including all day Saturday and Sunday, the rate is £290 + VAT an hour. The first hour is the minimum and covers the call out and finding the fault, and after that the visit is charged by the hour, with any return visit or further work quoted first. Commercial work is covered across all of London, 24 hours a day, with materials, parking, the congestion charge and waste removal extra where they apply.
Plant room maintenance is the servicing and repair of the central boilers and heating equipment that heat a block of flats or a commercial building.
Neos Engineering maintains plant rooms, communal boilers and heat networks across all of London, including work on commercial boilers, burners and valves.
Who can service a communal boiler in a block of flats in London?
Only a Gas Safe registered engineer may legally service a communal gas boiler. Neos Engineering, Gas Safe registration number 917055, services them across all of London.
The engineer's Gas Safe ID card lists the types of gas work they are qualified for, and you can check it on the Gas Safe Register.
Neos Engineering, based in Camden, NW1, works on district heating and communal heating systems across all of London.
District heating, also called a heat network, carries heat from one central source, such as an energy centre, to more than one building, so each home does not need its own boiler. Communal heating does the same for a single building. This work is priced on survey.
A commercial plumber looks after the water, waste and heating pipework in business premises and residential blocks, through planned visits and repairs.
At Neos Engineering that means reactive repairs, leak detection, water pumps, kitchen and bathroom plumbing, and planned maintenance visits across one building or several, with plant rooms and drains on the same number, across all of London.
Neos Engineering unblocks commercial drains across all of London, with call outs taken 24 hours a day, 365 days a year.
A commercial drain call out is £150 + VAT an hour per engineer, 8am to 5pm, Monday to Friday, and £290 + VAT an hour at any other time. The first hour is the minimum and covers the call out and finding the fault, and after that the visit is charged by the hour, with any return visit or further work quoted first. Materials, parking, the congestion charge and waste removal are extra where they apply.
Is it illegal to pour fat down a commercial kitchen drain?
Yes, under the Water Industry Act 1991, if the fat is likely to block the drain or the sewer it connects to.
Section 111 of the Act makes it an offence to let anything into a public sewer, or a drain connected to one, that is likely to interfere with the flow. A conviction can bring a fine or, in the Crown Court, up to two years in prison. Thames Water looks after the public sewers in London and visits food businesses about fat, oil and grease. In September 2026 it said it had prosecuted three businesses in the previous five years for improper trade effluent disposal and sewer misuse.
Neos Engineering clears blocked kitchen drains for businesses across all of London, 24 hours a day.
Usually, yes: Building Regulations guidance says drains from commercial hot food kitchens should have a grease separator or another effective way to remove grease.
The guidance is paragraph 2.21 of Approved Document H, which uses the term grease separator and says it should meet BS EN 1825. Approved Document H applies when drainage is built or altered, but a kitchen without a separator is still bound by the law against letting fat block a public sewer.
Planned plant room servicing from Neos Engineering covers a burner service, combustion checks, flue testing, and checks on the pumps, valves and pressurisation unit.
BS 6644 covers boilers over 70 kW net and up to 1.8 MW, and groups of smaller boilers that add up to more than 70 kW. BS 6798 covers boilers of 70 kW or less that heat homes, including homes in commercial buildings. The maker's instructions set what each service includes and how often, and HSE guidance for landlords recommends a yearly service where there are none.
Planned servicing of a plant room or communal boilers is priced after a site survey, with a written quote before any work is booked. A standard service on a single boiler at a business is priced per boiler, on the commercial boiler service and repair page.
Neos Engineering repairs commercial gas boilers and burners across all of London, with breakdown call outs taken 24 hours a day.
At a business, a breakdown call out is £150 + VAT an hour per engineer, 8am to 5pm, Monday to Friday, and £290 + VAT an hour at any other time. The first hour is the minimum and covers the call out and finding the fault, and after that the visit is charged by the hour, with any return visit or further work quoted first. Materials, parking, the congestion charge and waste removal are extra where they apply.
Does a communal boiler need a landlord gas safety check?
Yes, a communal boiler that heats rented flats needs the yearly landlord gas safety check, even though it sits outside the flats.
Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998 extends the landlord's duty to a gas appliance that serves the let home, where the landlord owns or controls it or it sits in a part of the building the landlord has an interest in. HSE says a communal boiler used by several homes must be maintained by a Gas Safe registered engineer and checked as part of the yearly gas safety check.
Yes, since 27 January 2026 Ofgem has regulated heat networks, including communal heating that serves one building divided into flats or other separate premises.
Networks already running were given deemed authorisation, and the operator and the supplier of each one must register with Ofgem by 26 January 2027. Ofgem defines the operator as the organisation with control over and responsibility for the transfer of heat on the network, and the supplier as the one responsible for the contractual and customer facing arrangements with the people supplied.
Neos Engineering maintains communal heating plant across all of London. Registering with Ofgem is the operator's and the supplier's job, not the maintenance contractor's.
Does replacing a communal boiler need a section 20 consultation?
Usually, yes: in England, works that will cost any leaseholder more than £250 need a section 20 consultation first.
The rule is in section 20 of the Landlord and Tenant Act 1985, and the £250 limit is set by the Service Charges (Consultation Requirements) (England) Regulations 2003. Without a consultation, or a dispensation from the property tribunal under section 20ZA, the landlord can usually recover no more than £250 from each leaseholder for those works. The tribunal can dispense with the consultation where that is reasonable, such as for an urgent repair.
Neos Engineering gives a written quote for plant room and communal boiler work after a site survey.
Does a business need a gas safety certificate every year?
No law sets a yearly gas certificate for a business, but an employer must keep its workplace gas appliances, pipework and flues safe.
That duty is regulation 35 of the Gas Safety (Installation and Use) Regulations 1998. HSE says employers should have their gas appliances maintained by a competent person in line with the maker's instructions, and that in workplaces such as shops, restaurants, schools and hospitals, work on gas fittings must be done by a Gas Safe registered engineer. HSE's catering guidance calls a yearly inspection a reasonable minimum.
Where people live on site, such as hotel rooms or a staff flat, the yearly landlord gas safety check applies to that part as well.
Do commercial landlords need a gas safety certificate?
No, the yearly landlord gas safety certificate applies to places people live, so a let shop or office does not need one.
The gas at a workplace must still be kept safe. Regulation 35 of the Gas Safety (Installation and Use) Regulations 1998 puts that duty on the employer or self employed person in control of the place of work. A flat above a shop that is let as a home, on a tenancy of less than 7 years or a licence, needs the yearly landlord check.
A CP42 is the record a Gas Safe registered engineer completes after checking the gas appliances and installation in a commercial kitchen.
CP42 is the name of an industry form, not a term in the law. The legal duty is regulation 35 of the Gas Safety (Installation and Use) Regulations 1998, which makes the employer keep the kitchen's gas appliances, pipework and flues safe. The usual form has a part for the kitchen as a whole, such as gas isolation, interlocks and ventilation, and a part for each appliance.
At Neos Engineering, the directors hold the Commercial Catering gas qualifications and carry out the CP42 checks.
A commercial kitchen with mechanical extraction should have an interlock that shuts off the gas to the appliances if the ventilation fails.
HSE guidance on gas safety in catering says manual bypasses of an interlock are not permitted. BS 6173, the British Standard for gas catering installations, is not retrospective, so HSE says an older kitchen without an interlock should assess whether a risk is likely and, if so, prevent or control it. IGEM/UP/19 Edition 2 sets out how interlocks are designed and applied in commercial kitchens.
Can a commercial kitchen use a domestic carbon monoxide alarm?
No, HSE says domestic carbon monoxide alarms are not normally suitable for commercial kitchens and should not be used there.
Where a kitchen has a carbon monoxide alarm, HSE says it should be made for commercial kitchens, give an audible warning, and be linked to an automatic gas shut off that needs resetting by hand. An alarm is a warning only: good ventilation and regular maintenance by competent people remain the main safeguards.
Yes, HSE says the yearly landlord gas safety check applies to hotels, guest houses and staff accommodation, as well as rented homes.
Each gas appliance and flue serving guest or staff rooms needs checking at least every 12 months, with a record kept. Kitchens and other working areas come under the employer's duty to keep gas safe, and HSE's catering guidance calls a yearly inspection a reasonable minimum.
Neos Engineering works for hotels across all of London.
Yes, schools must keep their gas appliances, pipework and flues safe, and HSE names schools among workplaces that need Gas Safe registered engineers.
The duty is regulation 35 of the Gas Safety (Installation and Use) Regulations 1998. Gas in science labs, design and technology rooms and food technology rooms is covered by IGEM/UP/11 Edition 3, the industry standard for gas used in teaching, which sets out isolation, testing and maintenance.
Neos Engineering works in education buildings across all of London.
No, a CP12 records a landlord gas safety check, and a CP42 records a gas safety check in a commercial kitchen.
Both are names of industry forms. The CP12 is the usual form for the landlord gas safety record that regulation 36 of the Gas Safety (Installation and Use) Regulations 1998 requires, and the CP42 covers the kitchen as a whole, including interlocks and ventilation, as well as each appliance.
Neos Engineering charges £110 + VAT (£132 inc VAT) an hour per engineer at a London home, 8am to 5pm, Monday to Friday.
The first hour is the minimum charge for any visit and covers finding the fault. Materials, parking, the congestion charge and waste removal are extra where they apply. At a business, the rate in the same hours is £150 + VAT an hour.
Per hour, per engineer. Plus VAT at 20%. For a home, the price with VAT is in brackets.
How much does an emergency plumber cost in London?
Neos Engineering charges £110 + VAT (£132 inc VAT) to £198 + VAT (£237.60 inc VAT) an hour for emergency plumbing at a London home.
The lower rate is 8am to 5pm, Monday to Friday, and the higher rate is any other time, including weekends. There is no separate emergency rate, and each engineer is charged at the hourly rate. Materials, parking, the congestion charge and waste removal are extra where they apply.
Yes, Neos Engineering's hourly rate is per engineer, so a job that needs two engineers is charged at two hourly rates.
At a business, the rate is £150 + VAT an hour for each engineer, 8am to 5pm, Monday to Friday, and £290 + VAT at any other time. At a home, it is £110 + VAT (£132 inc VAT) an hour for each engineer in those hours, and £198 + VAT (£237.60 inc VAT) at any other time. Materials, parking, the congestion charge and waste removal are extra where they apply.
Does Neos Engineering have a set price for each type of job?
Neos Engineering charges most work by the hour, from £110 + VAT (£132 inc VAT) at a London home, rather than a set price per job.
That applies to boiler repairs, blocked drains and leak detection. That rate is the first hour, 8am to 5pm, Monday to Friday, and the minimum for any visit. After the first hour, the visit is charged by the hour, with any return visit or further work quoted first. Boiler service, pre-winter boiler health check, landlord gas safety certificates and commercial boiler service are a set package price instead, each with a "From" figure on its service page. Bathroom work is priced after an on-site survey, and the survey fee is taken off the final bill if you go ahead.
A bathroom survey from Neos Engineering costs £110 + VAT (£132 inc VAT), 8am to 5pm, Monday to Friday. Out of hours it is priced when you call.
The fee is taken off the final bill if you go ahead with the work, and the bathroom work itself is priced after the survey. A small repair, such as a dripping tap, is a call out charged by the hour instead.
What does Neos Engineering charge on top of the hourly rate?
Neos Engineering adds materials, parking, the congestion charge and waste removal to the hourly rate, where they apply.
Materials are charged for what is used on the job. Parking is charged only if the property has no space, and the first 15 minutes an engineer spends looking for one are not charged. Waste is taken away, and charged, only if you ask.
Does Neos Engineering give a price before work starts?
Yes, Neos Engineering tells you the hourly rate when you book, and quotes a return visit or further work before it goes ahead.
The first hour covers the call out and finding the fault and costs £110 + VAT (£132 inc VAT) at a London home, 8am to 5pm, Monday to Friday. After that the call out is charged by the hour for the time on site.
Neos Engineering adds VAT to its rates, so £110 + VAT comes to £132 inc VAT.
Neos Engineering is VAT registered, and invoices show the price before VAT, the VAT and the total.
The Neos Engineering VAT number is GB 403354532.
Does Neos Engineering ask for payment upfront?
Yes, Neos Engineering takes payment for the first hour of any visit in advance.
The first hour is the minimum charge, however short the visit, and costs from £110 + VAT (£132 inc VAT) at a London home. After that the visit is charged by the hour, with any return visit or further work quoted first.
If you smell gas, call the National Gas Emergency Service free on 0800 111 999, at any time of day or night.
Open doors and windows, turn off gas appliances, and turn the gas off at the meter unless the meter is in a cellar. Do not use electrical switches, and do not smoke or light a flame.
Once the emergency engineer has made the gas safe, a Gas Safe registered engineer from Neos Engineering can repair a fault in an appliance or the pipework after the meter.
Turn the handle on the pipe next to your gas meter a quarter turn, so it sits at a right angle to the pipe.
This handle is the emergency control valve. In a block of flats the meter may be in a communal area, and the building manager can tell you where. If you smell gas, call the National Gas Emergency Service free on 0800 111 999, and do not go into a cellar or basement to reach the meter.
What should I do if my carbon monoxide alarm goes off?
If your carbon monoxide alarm goes off, stop using fuel burning appliances if you can, open doors and windows, and go outside.
If a gas appliance could be the cause, call the National Gas Emergency Service free on 0800 111 999, at any hour. Call NHS 111 if you feel unwell, or 999 if symptoms are serious.
Do not use the gas appliance again until a Gas Safe registered engineer, such as one from Neos Engineering, has checked it.
What counts as a plumbing emergency at a business?
Burst pipes, leaks you cannot stop, drains backing up and a building with no heating or hot water are emergencies at a business.
Neos Engineering takes emergency call outs at businesses across all of London, 24 hours a day, 365 days a year. If anyone smells gas, call the National Gas Emergency Service free on 0800 111 999 first.
At a business, an emergency call out is £150 + VAT an hour per engineer, 8am to 5pm, Monday to Friday, and £290 + VAT an hour at any other time. The first hour is the minimum and covers the call out and finding the fault, and after that the visit is charged by the hour, with any return visit or further work quoted first. Materials, parking, the congestion charge and waste removal are extra where they apply.
Yes, Neos Engineering runs a 24 hour emergency plumbing service for businesses and homes across all of London, 365 days a year.
Neos Engineering is based in Camden, NW1, and gives an arrival window for your address when you call 020 3780 0788. For work in your home, Neos Engineering goes anywhere inside the M25.
If a pipe bursts, turn off the water straight away at the stopcock, which is usually under the kitchen sink.
Turn off the heating and open all the taps to drain the pipes. If water is near sockets or lights, switch the electricity off at the fuse box, but only if you can reach it without touching water. For an emergency plumber across all of London, call Neos Engineering on 020 3780 0788, 24 hours a day.
Turn off the stopcock, turn on the taps, then thaw the pipe slowly with a wrapped hot water bottle or warm towels.
Thames Water advises thawing slowly, and the open taps let water escape as the pipe thaws. Once it has thawed, run a dry cloth along the pipe to check for leaks before turning the water back on.
If the pipe has split, treat it as a burst pipe. Neos Engineering takes emergency call outs across all of London, 24 hours a day.
Your stopcock, also called a stop tap, is usually under the kitchen sink, near where the water pipe comes into your home.
If it is not there, look in a downstairs bathroom or utility room, a cupboard near the front door, or under the stairs. In a flat, it may be by your front door or in a shared cupboard, and a landlord or building manager can tell you where. Turn it clockwise to shut off the water.
What should I do if water is coming through my ceiling?
If water is coming through your ceiling, keep away from the lights and switches, turn off your stopcock, and tell whoever lives above you.
If water is near electrics, switch the electricity off at the fuse box, but only if you can reach it without touching water. In a flat, tell the building manager too. Neos Engineering takes emergency call outs across all of London, 24 hours a day, 365 days a year, and can trace where the water is coming from.
If your toilet bowl is overflowing, stop flushing and turn off the water to the toilet.
Look for a small valve on the pipe into the cistern, the tank behind the toilet, and turn it with a flat screwdriver, or turn off the stopcock. Do not use the sinks, bath or shower, because they may drain into the same pipe. If neighbouring properties have the same problem, or sewage is coming up from a manhole in the street, call Thames Water, which usually looks after shared sewers across the areas Neos Engineering covers, even where another company supplies your water.
No heating or hot water is an emergency if there is a leak, or if young children, older people or anyone unwell is at home.
It is also urgent in freezing weather when simple checks, such as the boiler pressure and the thermostat, have not worked. If nobody is at risk, a Neos Engineering visit booked for 8am to 5pm, Monday to Friday, costs less than one at night or at the weekend.
Can a plumber make it safe now and repair it later?
Yes, on a call out the engineer can make a leak or a faulty appliance safe, then come back to finish the repair.
If the fault is in a gas appliance, regulation 34 of the Gas Safety (Installation and Use) Regulations 1998 says it must not be used while it is known or suspected to be dangerous.
A call out is charged by the hour, and a return visit or further work is quoted first.
It helps to give Neos Engineering your postcode, what the problem is, and whether the property is a business or a home.
Your postcode lets the Neos Engineering office give you an arrival window. Businesses and homes are charged different hourly rates. Tell the office if there is a parking space, because parking Neos Engineering has to pay for is added to the bill.
A Neos Engineering engineer first finds out what is wrong, and the first hour of the visit covers that.
The first hour is the minimum charge and is paid in advance. After that the visit is charged by the hour, with any return visit or further work quoted first. Materials used on the job are charged on top.
Neos Engineering charges £110 + VAT (£132 inc VAT) per engineer for the first hour of a boiler repair visit at a London home.
That rate is 8am to 5pm, Monday to Friday, and at any other time the first hour is £198 + VAT (£237.60 inc VAT). The first hour covers the call out and finding the fault, and after that the visit is charged by the hour, with any return visit or further work quoted first. Materials, parking, the congestion charge and waste removal are extra where they apply.
A boiler that keeps losing pressure is usually losing water through a leak in a pipe, a radiator or a part inside the boiler.
On most boilers the gauge should read 1 to 1.5 bar when the heating is cold, and bleeding radiators also lowers it. You can top the pressure up yourself by following the boiler manual. If it drops again within a few days, have an engineer find the leak, and any work inside a gas boiler must be done by a Gas Safe registered engineer.
No heating and no hot water often means low boiler pressure, a thermostat or timer setting, or a frozen condensate pipe.
Check the pressure gauge reads 1 to 1.5 bar, turn the thermostat up, and reset the timer if there has been a power cut. The condensate pipe is the small plastic pipe that carries water from most modern boilers to outside, and it can freeze in a hard frost. If you can reach it from the ground, pour warm, not boiling, water over it, then reset the boiler.
A radiator cold at the top and warm at the bottom has trapped air, and letting it out, called bleeding, usually fixes it.
With the heating off and cool, open the small valve at the top corner with a radiator key until the hissing stops and water appears, then close it. Bleeding lets water out, so check the boiler pressure afterwards. If the radiator is still cold, Neos Engineering can find the fault and repair it.
A radiator warm at the top and cold at the bottom usually has sludge, a sediment of rust and dirt, settled along its base.
Sludge forms as metal inside the heating system corrodes, and it stops hot water reaching the lower part of the radiator. One radiator can be taken off and flushed out, but several cold radiators point to the whole system needing a clean, such as a power flush, with inhibitor added afterwards.
Neos Engineering prices power flushing after a survey.
The law does not require a yearly boiler service in a home you own and live in, but some leases and boiler guarantees do.
Landlords, including anyone letting a room, must have every gas appliance and flue they provide safety checked by a Gas Safe registered engineer at least every 12 months. That duty comes from the Gas Safety (Installation and Use) Regulations 1998. The boiler maker sets the guarantee terms, so check the paperwork that came with the boiler.
At a London home, a standard boiler service is from £120 + VAT (£144 inc VAT), per boiler.
A full strip boiler service at a home is from £180 + VAT (£216 inc VAT), per boiler. For a business, a standard service is from £170 + VAT, per boiler, and a full strip service is from £180 + VAT, per boiler. The price is per boiler, and depends on the boiler's make and model. A standard service and a gas safety certificate booked together are from £200 + VAT (£240 inc VAT), service and certificate for one boiler. Each extra gas appliance on the certificate is £110 + VAT (£132 inc VAT). Those prices are for 8am to 5pm, Monday to Friday. Out of hours a standard service is charged at twice the price, from £240 + VAT (£288 inc VAT), per boiler at a home, and a full strip service, or a service and certificate together, is priced when you call. Materials, parking and the congestion charge are added where they apply, and further work beyond the service is quoted first.
Does a new boiler need Building Regulations sign off?
Yes, and the installer arranges it: a Gas Safe registered installer notifies a new or replacement boiler, so you make no building control application.
In England, Gas Safe Register is the competent person scheme for installing gas appliances. The installer notifies the work through it, and you should receive a certificate of compliance with Building Regulations. Government guidance says to contact the scheme if none arrives within 30 days of the work finishing.
Under the Gas Safety (Installation and Use) Regulations 1998, gas work done as a business must be done by a Gas Safe registered business. Anyone can check a registration on the Gas Safe Register at gassaferegister.co.uk.
The Neos Engineering Gas Safe registration number is 917055.
How do I check a gas engineer is Gas Safe registered?
Ask to see the engineer's Gas Safe ID card, then check the licence number on the Gas Safe Register at gassaferegister.co.uk.
The card lists the types of gas work the engineer is qualified to do, so check it covers your job. Check the photo matches the person at your door and the card is in date.
Yes, landlords must get a gas safety certificate at least every 12 months, covering every gas appliance and flue they provide.
A flue is the pipe or chimney that carries fumes outside. It covers homes let on a tenancy or licence, including a single room, but not homes sold on a lease of 7 years or more. The check must be done by a Gas Safe registered engineer. The rule comes from the Gas Safety (Installation and Use) Regulations 1998 and applies across England, Scotland and Wales.
A CP12 is the landlord gas safety certificate a Gas Safe registered engineer fills in after checking the gas appliances in a rented home.
Its legal name is a landlord gas safety record. By law it must include, among other things, the date, the property address, the name and address of the landlord or their agent, and what and where each appliance and flue is. It must also record any safety fault found, what was done about it, and the engineer's name, signature and Gas Safe registration number.
When do landlords have to give tenants a copy of the gas safety certificate?
Landlords must give existing tenants a copy of the gas safety certificate within 28 days of the yearly check.
New tenants must get a copy of the latest certificate before they move in. For stays of 28 days or less, such as a holiday let, the landlord can display it clearly inside the property instead.
How long do landlords have to keep gas safety certificates?
Landlords must keep each gas safety certificate until 2 more yearly checks have been done on that appliance or flue, which is about 2 years.
If a gas appliance or flue is removed from the property, keep its last certificate for 2 years from the date of that check. The rule is in the Gas Safety (Installation and Use) Regulations 1998.
Can I renew a landlord gas safety certificate early and keep the same renewal date?
Yes, if a landlord gas safety check is done in the last 2 months before it is due, the renewal date stays the same.
The law treats the check as if it was done on the due date. This rule was added to the Gas Safety (Installation and Use) Regulations 1998 in April 2018. A check done any earlier sets a new renewal date, 12 months from the day of the check.
In a landlord gas safety check, a Gas Safe registered engineer tests that each gas appliance and flue the landlord provides is safe.
By law the check covers at least 4 things: that the flue carries fumes away properly, that the appliance gets enough air to burn gas, the pressure or rate it burns gas at, and that it works safely. Any safety fault found goes on the gas safety certificate.
Is a boiler service the same as a gas safety check?
No, a boiler service and a gas safety check are different jobs.
A gas safety check tests that each gas appliance and flue is safe, and landlords must have one every 12 months. A boiler service is maintenance on the boiler itself.
Is the landlord or the tenant responsible for the gas safety check?
The landlord is legally responsible for the yearly gas safety check, not the tenant.
A tenant cannot take on the landlord's duty to check or maintain gas appliances, except for giving access. A gas appliance the tenant is entitled to remove is not part of the landlord's check.
How much does a landlord gas safety certificate cost in London?
From £110 + VAT (£132 inc VAT), per appliance, for a London landlord gas safety certificate from Neos Engineering.
The price is per gas appliance on the certificate, so a flat with a boiler and a gas fire is two appliances. Out of hours, a certificate is from £220 + VAT (£264 inc VAT), per appliance. Parking and the congestion charge are added where they apply.
Booked with a standard boiler service in the same visit, the two together are from £200 + VAT (£240 inc VAT), service and certificate for one boiler. At a home that is £30 + VAT (£36 inc VAT) less than the two booked separately, £230 + VAT (£276 inc VAT). Each extra gas appliance on the certificate is £110 + VAT (£132 inc VAT).
What if a tenant will not give access for the gas safety check?
HSE inspectors look for at least three attempts to carry out the gas safety check.
Leave a note after each missed visit with your contact details, write to the tenant explaining that the check is a legal requirement for their own safety, and give them the chance to arrange their own appointment. Do not force entry. A landlord has to show they took all reasonable steps, and HSE strongly advises keeping a record of all correspondence with the tenant. Whether the steps were reasonable is for a court to decide.
Neos Engineering's office can contact the tenant directly to agree a time.
Is the letting agent or the landlord responsible for the gas safety check?
The landlord holds the duty, and if the management contract gives it to the letting agent, the same legal duties apply to the agent.
HSE advises that the contract should say clearly who arranges maintenance and the yearly check, and strongly advises landlords to ask the agent for copies of the records. Whoever holds the duty must make sure existing tenants get a copy of the record within 28 days of the check, and new tenants before they move in.
Neos Engineering carries out gas safety checks for landlords and letting agents, for single lets and whole portfolios.
Do holiday lets and HMOs need a gas safety certificate?
Yes, the yearly landlord gas safety check applies to holiday lets, houses in multiple occupation and rooms let in a shared house.
Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998 covers any home, or part of one, let on a tenancy or a licence, unless the lease is for 7 years or more. HSE lists rented holiday chalets, cottages, flats, caravans and narrow boats among the lets covered, as well as bedsits, hostels, bed and breakfasts and hotels. Every gas appliance and flue the landlord provides needs checking at least every 12 months.
Does a gas cooker have to be fitted by a Gas Safe engineer?
Yes, fitting a gas cooker or hob is gas work, so anyone doing it as a business must be Gas Safe registered.
The rule is regulation 3 of the Gas Safety (Installation and Use) Regulations 1998, which also says nobody may do gas work, paid or not, unless they are competent to do it. Plugging in or unplugging a cooker on a bayonet or other self sealing connector is not counted as gas work under regulation 2.
Neos Engineering's Gas Safe registered engineers fit and move gas cookers and hobs.
Yes, in England landlords must fit a carbon monoxide alarm in any living space with a fixed combustion appliance, such as a boiler.
Gas cookers are the exception. The rule covers any room used wholly or partly as living accommodation, and a bathroom or toilet counts as one. It comes from the Smoke and Carbon Monoxide Alarm (England) Regulations 2015 as amended from 1 October 2022, and applies to private and social landlords. The landlord must also repair or replace an alarm once told it is faulty.
What happens if a landlord does not have a gas safety certificate?
Not having the yearly gas safety check done is a criminal offence for a landlord, and HSE can prosecute.
Breaking the Gas Safety (Installation and Use) Regulations 1998 is an offence under section 33 of the Health and Safety at Work etc. Act 1974, and HSE says it could result in a substantial fine, a prison sentence or both.
Who is responsible for the gas pipes at a property?
The property owner, or the landlord in a let property, is responsible for the gas pipes from the meter to the appliances.
The gas network company looks after the pipes in the street and up to the meter, and your gas supplier is responsible for the meter. At a workplace, regulation 35 of the Gas Safety (Installation and Use) Regulations 1998 makes the employer or self employed person in control keep the pipework after the meter in a safe condition.
A Gas Safe registered engineer from Neos Engineering can repair or alter pipework after the meter.
What plumbing work does Neos Engineering do in London?
Neos Engineering does commercial and domestic plumbing across London, from leaks and blocked drains to emergency, bathroom and kitchen work.
Neos Engineering is based in Camden, NW1, and covers commercial plumbing and drainage across all of London, and homes anywhere inside the M25. Neos Engineering also repairs taps, clears blocked sinks, fits showers and water pumps, and repairs and fits radiators.
How much does it cost to unblock a drain in London?
Neos Engineering charges £110 + VAT (£132 inc VAT) per engineer for the first hour of a blocked drain call out at a London home.
That rate is 8am to 5pm, Monday to Friday, and at any other time the first hour is £198 + VAT (£237.60 inc VAT). The first hour covers the call out and finding the fault, and after that the visit is charged by the hour, with any return visit or further work quoted first. Materials, parking, the congestion charge and waste removal are extra where they apply.
Neos Engineering charges £110 + VAT (£132 inc VAT) per engineer for the first hour of leak detection at a London home.
That rate is 8am to 5pm, Monday to Friday, and at any other time the first hour is £198 + VAT (£237.60 inc VAT). The first hour covers the call out and finding the leak, and after that the visit is charged by the hour, with any return visit or further work quoted first. Materials, parking, the congestion charge and waste removal are extra where they apply.
Signs of a hidden water leak include a growing damp patch, the sound of running water, and a water meter moving when nothing is on.
If you have a meter, turn off every tap and appliance, read it, then read it again an hour later, and a change means water is escaping. A boiler that keeps losing pressure can mean a leak in the heating pipes, which the meter test will not show. Neos Engineering traces and repairs hidden water leaks across London.
In London, property owners are usually responsible for drain pipes that serve only their property and sit inside its boundary.
Thames Water usually looks after drains shared with neighbouring properties, drains outside your boundary, and public sewers. In a block of flats, drains inside the boundary that serve more than one flat are usually the freeholder's or the management company's responsibility. In a converted house with no management company, the flat owners usually share them. If you rent, tell your landlord or letting agent first.
A drain usually keeps blocking because something in the pipe catches waste, such as fat, wipes, limescale, tree roots or a damaged section.
Clearing the blockage gets water flowing again, but the drain can block again until the cause is found and fixed. Neos Engineering clears blocked drains in London and can look for the cause.
Does plumbing work at a business have to be notified to the water company?
Some work does: in premises other than a house, extending or altering the water system must be notified to the water company before work starts.
The rule is regulation 5 of the Water Supply (Water Fittings) Regulations 1999, and notice is given by whoever plans to install the fitting. The water company has 10 working days to refuse consent or set conditions, and if it does not reply, consent is treated as given. An approved contractor does not need to give notice for alterations at premises other than a house. Some fittings need notice in a home too, such as a bath holding more than 230 litres.
What temperature should stored hot water be kept at?
HSE guidance says stored hot water should be kept at 60°C or above, and reach at least 50°C at the taps within one minute.
This controls the growth of legionella bacteria, and HSE says cold water should be kept below 20°C where possible for the same reason. In healthcare premises the figure at the taps is 55°C. Water from taps above 44°C can scald. Where vulnerable people use baths or showers, such as in a care home, and the scald risk is significant, HSE says a type 3 thermostatic mixing valve must be fitted.
Neos Engineering covers businesses across all of London, and homes anywhere inside the M25.
Neos Engineering is based in Camden, NW1, and the ground nearest the base is North London, from King’s Cross and Islington up to High Barnet and Edgware. Neos Engineering takes call outs 24 hours a day, 365 days a year, and gives an arrival window for your address when you call.
Neos Engineering is based at 119 Castlehaven Road, Camden, London NW1 8SJ.
Neos Engineering works from this Camden base, and the office gives an arrival window for your address when you call. The company is Neos Engineering London Ltd, a Gas Safe registered plumbing, heating and drainage firm, Companies House number 13897050.
Is there a plumber near me in Camden, Kentish Town or Islington?
Yes, Neos Engineering is a Gas Safe registered plumber based in Camden, NW1, about half a mile from Kentish Town and two miles from Islington.
Neos Engineering works from 119 Castlehaven Road, NW1 8SJ, and covers Camden NW1, Kentish Town NW5, Islington N1 and North Islington N7. Neos Engineering gives an arrival window for your address when you call.
Does Neos Engineering cover Barnet, Finchley and Edgware?
Yes, Neos Engineering covers Barnet, Finchley and Edgware, reaching High Barnet EN5 and Edgware HA8 from its base in Camden, NW1.
In the same part of North London, the ground nearest the Camden base, Neos Engineering covers Finchley N3 and N12, East Finchley N2, Whetstone N20, Golders Green NW11, Hendon NW4, Colindale NW9 and Burnt Oak HA8. Neos Engineering runs a 24 hour call out service and gives an arrival window for your address when you call.
Yes, Neos Engineering works in the City of London, EC1 to EC4, for offices and homes.
Neos Engineering also covers Marylebone W1 and King’s Cross N1C. Neos Engineering adds the congestion charge where it applies, and paid parking if the building has no space.
Yes, Neos Engineering works across the City of Westminster, for businesses and for homes.
That takes in Marylebone, Fitzrovia, Mayfair and Soho in W1, Victoria and Pimlico in SW1, Covent Garden and the Strand in WC2, and Paddington in W2. The office gives an arrival window for the address when you call. Neos Engineering adds the congestion charge where it applies, and paid parking if the building has no space.
Neos Engineering is Gas Safe registered, a Vaillant accredited installer, and accredited by CHAS and SafeContractor.
CHAS and SafeContractor are schemes that businesses and managing agents use to vet contractors. Neos Engineering's Gas Safe registration can be checked at gassaferegister.co.uk.
You can read reviews of Neos Engineering on TrustATrader and Google.
Neos Engineering has 106 reviews across its two TrustATrader listings. Checkatrade holds the reviews of CJ Plumbing & Heating, one of the two businesses that merged to form Neos Engineering.
What is Neos Engineering's rating on TrustATrader?
As of 27 August 2026, Neos Engineering is rated 4.95 and 4.98 out of 5 on its two TrustATrader listings.
Each listing has 53 reviews, 106 in all. The NW1 and NW5 listing covers plumbing and is rated 4.95, and the E1 and E1W listing covers heating and gas work and is rated 4.98.
The Checkatrade profile linked to Neos Engineering belongs to CJ Plumbing & Heating, one of the two businesses that merged to form Neos Engineering.
As of 26 August 2026, that profile shows 9.95 out of 10 from 81 reviews. CJ Plumbing & Heating London Ltd (company 12393301) is still a separate company from Neos Engineering London Ltd (company 13897050).
