Find checked Gas Safe registered engineers in Merton for annual boiler services, landlord gas safety records (CP12), combi and system boiler servicing, and routine maintenance to keep manufacturer warranties valid.

✅ Checked before listing — identity, insurance, trading presence, Gas Safe (where relevant).
How we verify →
✅ Workmanship guarantee badges on listings — 1, 3, 6 or 12 months

Plumbers set their own response times and prices — confirm availability and pricing before booking.

Contact directory-listed engineers in Merton ↓

No specialists found for this search.

Contact one or more engineers directly from the listings above. Listings are checked before publication. Workmanship guarantee availability is shown on each listing where offered.

When you contact an engineer, confirm:

• Service scope and response time.
• Service / CP12 pricing and any extras (e.g. parts, descaling, system flush).
• Call-out terms and what’s included.

You contact and pay the engineer directly — each listing operates independently. You can contact more than one engineer, and there is no commitment until you agree a booking.

Smell gas, hear hissing or suspect a gas leak? Call the National Gas Emergency Service on 0800 111 999 (free, 24/7) — see the gas emergency steps below.

Boiler showing CO concern symptoms (people in the home developing headaches, dizziness, nausea, confusion that ease when leaving)? Leave the property and call 0800 111 999 — see Carbon monoxide below.

Renting from a housing association? Annual servicing is normally arranged by your housing association — check your tenancy paperwork. See routing below.

Safety first

Gas emergency

Smell gas, hear hissing or suspect a gas leak. Do not switch anything on or off, and do not use flames, electrical appliances, or smoke.

Open doors and windows if it is safe to do so. If you know where the gas meter emergency control valve is and it is safe to reach, turn off the gas at the meter. Leave the property if the smell is strong or you feel unsafe, and call the National Gas Emergency Service on 0800 111 999 (free, 24/7) from outside.¹

If you are unsure of the emergency control valve’s location or how to operate it, do not attempt to use it. Leave the property, ventilate as you go, and call 0800 111 999 from outside.

Under the Gas Safety (Installation and Use) Regulations 1998 (enforced by HSE), gas work on appliances, pipework, fittings or flues must be carried out by a Gas Safe registered engineer competent for that specific category of work, registered through the Gas Safe Register.⁵

Listing checks confirm Gas Safe registration against the Gas Safe Register database at the point of listing — they do not guarantee current registration or category competence on the day. Always verify the engineer’s licence number on the Gas Safe Register at booking and again on arrival, before any gas work begins, and confirm they are competent for the appliance category being serviced. Domestic central heating boilers are a separate competence to gas cookers, gas fires, or commercial appliances.¹⁵

Carbon monoxide

A faulty, badly installed or poorly maintained boiler is one of the more common sources of indoor carbon monoxide (CO) exposure.¹⁷ A regular service is one of the more reliable ways to surface combustion-related issues before they become a CO concern.

Symptoms of CO exposure include headaches, dizziness, nausea, confusion, or symptoms that ease when leaving the property. If anyone develops these symptoms, open windows, leave the property, and call 0800 111 999 so the supply can be made safe. Do not re-enter the property until the National Gas Emergency Service or a Gas Safe registered engineer has declared it safe. Then seek medical advice. If symptoms are severe or anyone has lost consciousness, call 999 first.

Under the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022, private and social rented dwellings in England must have a CO alarm in any room used as living accommodation that contains a fixed combustion appliance other than a gas cooker; enforcement is by local authorities.³⁹

Owner-occupiers are not covered by the landlord alarm duty, but installing a CO alarm is a sensible safety measure. Follow the alarm manufacturer’s siting instructions. CO alarms certified to BS EN 50291 are widely available.

If a service surfaces visible signs of poor combustion — sooty marks, yellow rather than blue flame in older non-condensing models, condensation on windows in the boiler room, or pilot lights that won’t stay lit — the engineer will normally recommend that the boiler be turned off and not used again until further investigation. If anyone has had symptoms, leave the property and call 0800 111 999.

Right page for your problem

• Annual boiler service, landlord gas safety record (CP12), combi or system boiler service — you’re on the right page.
• Boiler not working, error code, lockout, pressure loss, leak from inside the casing, no hot water — Boiler Repair Merton
• New boiler — replacement quote, conversion, upgrade or new install — Boiler Installation Merton
• Cold radiators, system imbalance, hot water cylinder issue (not boiler-side) — Central Heating Repair Merton
• Out-of-hours emergency — Emergency Plumber Merton

What an annual boiler service includes

A standard annual boiler service from a Gas Safe registered engineer typically covers the items below. The exact scope, time on site, and what’s included for the headline price varies by engineer — confirm scope on the call.

• Visual inspection of the boiler casing, flue, condensate pipe, gas supply pipework around the appliance, and any external fixings or supports.
• Removal of the casing for internal inspection of the burner, heat exchanger, fan, ignition components, gas valve and electrical connections.
• Burner and combustion chamber clean where required.
• Combustion analysis — measuring CO, CO₂, and oxygen levels in the flue gases against the manufacturer’s specifications. This is the most important safety check on the visit.
• Gas tightness test at the meter, where applicable, using appropriate pressure-testing equipment.
• Flue integrity check — visual inspection and (where required) flue gas analyser readings to confirm no products of combustion are escaping into the property.
• Controls and safety device testing — including thermostat operation, programmer function, pressure relief valve, expansion vessel pressure (sometimes), and any lockout / safety cut-out devices.
• System pressure check (sealed systems) — confirming pressure is within manufacturer specification, topping up if needed, and checking for visible leaks.
• Reassembly, recommission, and final test fire — checking the boiler runs through its full sequence and reaches normal operating temperature.
• Written record — most engineers leave a service certificate or check-list noting what was done, any issues, and any recommended follow-up work.

A service is not a repair. If the engineer surfaces a fault during the service (fan failing, gas valve issues, internal leak, expansion vessel collapsed), the cost of remedying it is normally separate from the service fee. An honest engineer will tell you what they’ve found, give you the cost, and let you decide.

A landlord gas safety record (CP12) is a separate document covering the legal landlord duty under the Gas Safety (Installation and Use) Regulations 1998 — it can be issued alongside an annual service in the same visit, but a CP12 alone is not the same as an annual service. See the Landlord CP12 section below.

Why service annually

There are three main reasons most owners and landlords service their boilers every year — and one regulatory one that applies only to landlords.

• Safety. A combustion analysis at service is one of the more reliable ways to surface CO and combustion-related issues before they become a problem. Boilers degrade slowly; an annual check catches drift before it becomes a fault.
• Manufacturer warranty. Some manufacturer warranties require annual servicing by a Gas Safe registered engineer to remain valid — check your warranty terms. A skipped year may invalidate the warranty entirely or for the relevant period.
• Efficiency and lifespan. Servicing usually surfaces small issues that, left alone, accelerate wear — a partially blocked condensate trap, a slightly mis-set gas valve, a failing expansion vessel. Catching these at £150 service-time is cheaper than at £400 repair-time.
• Landlord legal duty. Landlords letting a property with a gas appliance must hold a current Landlord Gas Safety Record (CP12) — see the Landlords and CP12 section below.

If your boiler is brand new, the manufacturer’s annual service requirement starts from year one — you don’t get a free pass on the first year because it’s new. If your boiler is more than 12 years old, the service is still worth doing, but the engineer should also be giving you an honest read on remaining service life and whether replacement is the better next step.

Service vs repair vs replace

A service is preventative. A repair is reactive. A replacement is when one or both of those have moved past economic.

• Service: Annual, planned, fixed scope, mostly the same work each year.
• Repair: Reactive, scope determined by the fault, cost driven by parts and access.
• Replacement: A separate workstream — see Boiler Installation Merton.

Some service visits surface faults that need separate repair work. Some pre-purchase boiler checks for someone buying a property in Merton come up with the same surface — a service-style check that turns into a repair-quotation visit. The engineer’s invoice should be clear on what’s a service and what’s a repair.

What a directory engineer will do — and what they won’t

A Gas Safe registered engineer arriving for an annual service will normally carry out the items listed above, leave a service record, note any issues for follow-up, and give you an honest steer on whether anything is approaching end-of-life.

Many will also offer add-on work in the same visit — magnetic system filter installation, system flush, CO alarm installation, thermostat upgrade, smart-controls fitting. These are normally charged separately from the service fee.

Directory-listed engineers cannot:

• Issue a CP12 for a boiler outside their Gas Safe category competence.⁵
• Sign off a boiler that is not safe to use just to keep the customer happy — if the engineer finds a CO concern, gas leak, or major safety fault, the boiler may be classified “At Risk” or “Immediately Dangerous” under the Gas Industry Unsafe Situations Procedure, in which case the appliance must be turned off and disconnected with the customer’s permission.
• Work on boilers held under a housing-association service contract without authorisation — many Merton housing-association tenants have annual servicing arranged by the association’s contractor, and a directory engineer will not be reimbursed by the housing association for this work.
• Force entry into communal plant rooms in mansion blocks or estate housing — for buildings with shared heating systems or boiler plant, the building manager, freeholder or housing association controls access and authorises work.

If a service surfaces a major fault, an honest engineer should give you a clear honest picture of the costs and discuss replacement options (Boiler Installation Merton) rather than press ahead with marginal repair work.

Landlords and CP12

Landlords letting a property must:

• Arrange annual gas safety checks by a Gas Safe registered engineer on landlord-provided gas appliances and flues, and maintain relevant gas pipework safely. Tenant-owned appliances are treated differently under HSE guidance, although associated flues and installation pipework may remain within the landlord’s responsibilities.
• Hold a current Landlord Gas Safety Record (commonly called a “CP12” or “gas certificate”).¹⁸
• Provide a copy of the current CP12 to existing tenants within 28 days of the check, and to new tenants before they move in.
• Keep CP12 records for at least two years.
• Arrange for any defects identified during the check to be corrected promptly.

The CP12 covers the landlord-provided gas appliances along with their flues and installation pipework. A CP12 covering only the boiler does not satisfy the landlord duty if other landlord-provided gas appliances (gas hob, gas fire, gas oven) are present. Tenant-owned appliances are handled separately under HSE guidance — confirm scope with the engineer before the visit if any appliances in the property are tenant-owned.

The CP12 visit can be combined with an annual boiler service if the landlord chooses — it’s often more economical to do both in the same visit. But a CP12 alone is not the same as a full annual service: the CP12 is a legal-compliance gas safety check, while a service is a deeper maintenance visit including burner clean, combustion analysis to manufacturer specs, and controls testing.

If your home is in one of Merton’s selective licensing wards (Figge’s Marsh, Graveney, Longthornton, Pollards Hill) or additional HMO licensing wards (those four plus Colliers Wood, Cricket Green, Lavender Fields), the council’s licensing team can check that landlords are holding a current CP12 as part of licence-condition compliance.⁵⁰ This is in addition to, not instead of, the national gas safety duty.

If you’re a landlord and your CP12 is overdue, prioritise it. Operating without a current gas safety record may breach the Gas Safety Regulations and can expose the landlord to enforcement action. It may also affect insurance and possession proceedings depending on the circumstances.

Merton-specific signals

Merton’s housing stock and street pattern shape boiler servicing across the borough. The borough sits in a hard-water area, and housing stock spans Victorian / Edwardian terraces in the west through 1930s suburban semis to interwar and post-war estates in the east and south.

The following observations are based on local trade experience and the borough’s confirmed area-by-area mix, not on official data.

Wimbledon and west Merton (SW19, SW20). Victorian and Edwardian terraces with retrofitted boilers in awkward locations are common — under stairs, in pantry cupboards, in first-floor bathrooms, in airing cupboards. Service visits in these properties take longer than in modern flats with kitchen-fitted combis, because access and reassembly take longer.

In converted flats, the picture varies between flats in the same converted house — different ages, different makes, different installers. Servicing each flat in a converted Victorian house is essentially independent work.

Raynes Park and west Merton (SW20). 1930s suburban semis with airing-cupboard system boilers and hot-water cylinders are common, alongside more recent combi conversions. System boilers with cylinders need slightly more service-visit time than combis (cylinder, immersion heater backup, cylinder thermostat all need checking).

Colliers Wood and South Wimbledon (SW19). A mix of older terraces with retrofitted boilers and modern apartment developments with newer combi installations. Service visits in modern apartment blocks can be more efficient because the boiler make and installation pattern is consistent across flats.

Mitcham and east Merton (CR4). Interwar and post-war housing estates with consistent layouts. Many estate properties have boilers managed by a housing association service contract — annual servicing is arranged by the association rather than the resident.

A meaningful share of the private-rented stock here is in the borough’s selective licensing wards (Figge’s Marsh, Graveney, Longthornton, Pollards Hill), where landlord CP12 compliance is actively checked by the council’s licensing team.⁵⁰

Pollards Hill (CR4). Concentration of large estate housing. Some blocks have communal heating with central plant managed by the housing association; individual flat servicing applies only to flats with their own boiler. Communal-plant servicing is not directory-engineer work.

Morden (SM4). 1930s suburban housing and the St Helier estate. Standardised boiler layouts; mixed boiler ages reflecting different replacement cycles across the streetscape.

Motspur Park and Lower Morden (SW20 / SM4). Low-density 1930s housing, predominantly family homes with combi or system boilers in airing cupboards or kitchens.

Hard water across the borough. Service visits in Merton more often surface scale-related issues than service visits in soft-water London boroughs. Heat-exchanger scale, kettling, blocked auto-air-vents, and reduced hot-water flow rate from scaled plate heat exchangers in combis are all recurring service-visit findings. Many Merton service visits include a discussion of whether a power flush, descaling treatment, or magnetic system filter would reduce the rate of scale-related wear. See our London Hard Water Guide.

Conservation areas. Merton has a number of conservation areas including (among others) the John Innes (Merton Park) and John Innes (Wilton Crescent) conservation areas, both of which are subject to Article 4 directions that restrict permitted development.⁵³

Routine internal boiler servicing does not engage these controls. New external flue terminations, new condensate runs along visible elevations, or boiler relocations affecting visible external fabric are planned-work conversations rather than service-visit ones.

Housing association tenants

Merton Council does not own any council housing. Following a tenants’ ballot, all the council’s former housing stock was transferred in March 2010 to Merton Priory Homes (now part of Clarion), and social housing in Merton is now provided by housing associations.⁵²

If you’re a housing-association tenant, your annual boiler service is normally arranged by the housing association — typically through a national heating contractor on contract. You don’t book a directory engineer for the annual service.

For housing-association tenants:

• Your housing association will normally contact you to arrange the annual gas safety check — this satisfies their landlord CP12 duty under the Gas Safety Regulations.¹⁸
• Don’t ignore service appointment letters; missing the annual check repeatedly can affect your tenancy, and the housing association has a legal obligation to complete it.
• If your boiler is showing a fault between annual visits, contact your housing association’s repairs line — directory engineers cannot bill the housing association on your behalf.

If your housing association is not arranging the annual gas safety check, or is missing the deadline repeatedly, Merton Council’s Tenants’ Champion can help you escalate.⁵¹ The council’s Housing Enforcement team can also intervene where housing-association compliance failures meet the threshold for action.

Leaseholders

If you own a leasehold flat in Merton, your lease sets out which works are your responsibility (typically internal pipework, fittings and the flat’s boiler) and which are the freeholder’s, managing agent’s or housing association’s (typically structure, exterior, communal plant rooms and shared services).

A meaningful number of Merton leasehold flats are in former council blocks — following the 2010 transfer to Merton Priory Homes (now Clarion), the freeholder is often a housing association rather than a private landlord or commercial managing agent. The lease structure is typically inherited from the original council lease.⁵²

For the boiler in your own flat, you arrange the service. If the heating supply to your flat is from communal plant (district heating), the freeholder or housing association is responsible for the central plant — and that plant has its own service regime.

Private renters and landlords

If you rent privately in Merton, your landlord (or their managing agent) is responsible for arranging the annual gas safety check on the boiler and any other gas appliances. The landlord must provide you with a copy of the current Landlord Gas Safety Record (CP12) within 28 days of the check, and to new tenants before they move in.¹⁸

If your landlord has not provided a CP12 or is overdue, Merton Council’s Housing Enforcement team can intervene where this affects health and safety, including the gas-safety duty.⁵¹ The council expects you to have asked the landlord first.

If your home is in one of Merton’s selective licensing wards (Figge’s Marsh, Graveney, Longthornton, Pollards Hill) or additional HMO licensing wards (those four plus Colliers Wood, Cricket Green, Lavender Fields), licence conditions cover ongoing repair obligations, current gas safety records (CP12), and CO alarms. Persistent absence of a current CP12 may be relevant to council enforcement or licensing action, depending on the facts. Tenants in licensed properties may also raise relevant licence-condition concerns with the council.⁵⁰

Landlords arranging an annual service or CP12 should book directly with a Gas Safe registered engineer competent for the appliance category. A CP12 issued by an engineer not registered for the appliance category being checked is not valid. Documenting the visit (CP12, photos of any flue or pipework issues, dates) supports both the gas-safety record and any subsequent regulatory enquiry.

Selective Licensing and HMOs in Merton

Merton Council operates property licensing schemes that affect private rented homes, alongside the national mandatory HMO licensing scheme. Full scheme detail and the application portal are on Merton Council’s property licensing pages.⁵⁰

• Selective licensing (24 September 2023 to 23 September 2028): all single-family or two-sharer private rented homes in Figge’s Marsh, Graveney, Longthornton and Pollards Hill wards.⁵⁰
• Additional HMO licensing (24 September 2023 to 23 September 2028): smaller HMOs (typically three or four occupiers forming more than one household, sharing kitchen or bathroom facilities) in Colliers Wood, Cricket Green, Figge’s Marsh, Graveney, Lavender Fields, Longthornton and Pollards Hill wards, where the property is not already covered by the mandatory HMO licensing scheme.⁵⁰
• Article 4 directions for small HMOs — permitted development rights for conversion from dwellinghouse (Use Class C3) to small HMO (Use Class C4) have been removed across Merton. The original direction (in force from 17 November 2022) covers Colliers Wood, Cricket Green, Figge’s Marsh, Graveney, Lavender Fields, Longthornton and Pollards Hill. A further immediate direction covering 13 additional wards — Abbey, Cannon Hill, Hillside, Lower Morden, Merton Park, Ravensbury, Raynes Park, St Helier, Wandle, West Barnes, Wimbledon Park, Wimbledon Town and Dundonald and Village — started on 24 March 2026 and is subject to confirmation following consultation by 19 June 2026. Larger HMOs are controlled separately through planning use class rules.⁵⁶
• Mandatory HMO licensing (national): HMOs occupied by five or more people from two or more households sharing basic amenities. Mandatory licence conditions are set out in Schedule 4 of the Housing Act 2004.⁴⁰

A Gas Safe engineer attending a service or CP12 visit in a licensed rental will not enforce licence conditions — that’s the council’s role — but if the visit surfaces installation problems (out-of-date gas safety records, missing CO alarms, unsafe pipework, persistent disrepair), the landlord must address those issues to remain compliant.

Indicative boiler servicing costs in Merton

These figures are based on typical London plumbing market rates observed across independent contractors and directories — not regulated rates and not official market data.

We are not aware of official regulated pricing data for private boiler service rates, and no UK regulatory body publishes standard service rates. Prices vary by boiler make and model, access, time required, and whether additional work (descaling, magnetic filter, power flush) is bundled.

Merton-specific cost factors that may affect the figure:

• Hard-water-related add-ons. Borough-wide; service visits in Merton more often recommend a magnetic filter, descaling treatment, or system flush than in soft-water boroughs. These are usually quoted separately.
• Period property access. Boilers in awkward retrofit locations in Wimbledon and west Merton’s Victorian/Edwardian stock take longer to service.
• Cylinder + system boiler. 1930s and interwar housing in west and east Merton more often runs system or regular boilers with cylinders than newer flats — service-visit time is longer.
• Communal plant. Service of communal heating plant in housing-association blocks in Pollards Hill, St Helier and similar is the housing association’s contractor’s work, not directory-engineer work.
• Multiple-appliance CP12. A landlord property with a boiler, gas hob, and gas fire needs all three checked — extra appliances on the same visit are normally £20–£50 each.

Confirm the service fee, what’s included, parts mark-up if any, and minimum charge when you contact the engineer.

Why directory-listed engineers

Every engineer in our directory has been checked for identity, insurance, trading presence and Gas Safe registration where relevant before listing, and rechecked annually. Listing checks are administrative and do not replace user verification on the day.

We are not a regulator or certification body; our listing checks do not replace user verification on the day. Verify the engineer’s licence number on the Gas Safe Register at booking and on arrival, before any gas work begins, and confirm category competence for the boiler being serviced.⁵ ¹⁵

Some engineers offer workmanship guarantees of 3, 6 or 12 months — look for the badge on the listing. Workmanship guarantees are set by individual engineers and vary in scope; they are not standardised, and are not insurance-backed unless an engineer explicitly states otherwise.

Public liability insurance is not a statutory requirement for plumbers and heating engineers, but it is industry-standard and is often contractually required by clients, landlords, agents, blocks of flats or commercial sites. Evidence of public liability insurance was provided at the time of listing; users should confirm current cover with the contractor before booking.

Listing checks are completed before publication and repeated annually. Always confirm pricing, scope and call-out terms on the call before booking.

Frequently asked questions – Boiler Servicing Merton

Areas covered

Directory engineers cover Merton borough addresses across SW19, SW20, SM4, CR4, SW16, SW17, SW18 and KT3 — including:

• Wimbledon (SW19, SW20)
• Wimbledon Park (SW19)
• South Wimbledon (SW19)
• Colliers Wood (SW19)
• Merton Park (SW19, SW20)
• Crooked Billet (SW19)
• Raynes Park (SW20)
• Cottenham Park (SW20)
• Copse Hill (SW20)
• Motspur Park (KT3, SW20 — partly)
• Morden (SM4)
• Lower Morden (SM4)
• Morden Park (SM4)
• St Helier (SM4 — partly, also Sutton)
• Mitcham (CR4)
• Mitcham Common (CR4 — mostly)
• Bushey Mead (CR4)
• Pollards Hill (CR4 — partly)
• New Malden (KT3 — partly)
• Norbury (SW16 — partly)
• Southfields (SW18 — partly)
• Summerstown (SW17 — partly)

Postcodes can extend beyond borough boundaries; the wards above are the parts within Merton.

Related services

• Boiler Repair Merton
• Boiler Installation Merton
• Central Heating Repair Merton
• Emergency Plumber Merton
• Leak Detection Merton
• General Plumbing Merton
• Commercial Plumbing Merton

Related guides

• London Hard Water Guide
• London Plumbing Costs & Compliance Guide 2026
• How to Read a Plumbing Quote
• Boiler Repair vs Replace Guide
• Landlord Plumbing Compliance Checklist
• New Homeowner Plumbing Guide — London 2026

Closing

Servicing a boiler in Merton turns on three things: getting a competent Gas Safe engineer who’ll give you an honest service-vs-repair-vs-replace read, keeping any manufacturer warranty valid by booking annually, and (for landlords) holding a current CP12 for every appliance covered by the regulations.

Hard-water-related scale and heat-exchanger wear are the recurring service-visit themes across the borough — a magnetic filter or system flush conversation is common at Merton service visits and may be worthwhile depending on system condition.

Merton no longer has council-owned housing — housing-association tenants have annual servicing arranged by the association; leaseholders book their own engineer for the boiler in their flat with managing-agent involvement for shared plant. Confirm pricing, scope and call-out terms on the call — before any work starts.

Source provenance

Regulatory and safety guidance on this page is drawn from primary UK sources: HSE (gas safety, CO awareness, Gas Safe Register guidance, Landlord Gas Safety Record, gas emergency number 0800 111 999), the Gas Safety (Installation and Use) Regulations 1998, the Landlord and Tenant Act 1985 (Section 11), the Housing Act 2004 (Schedule 4 — licence conditions), Approved Document P (electrical safety in dwellings), the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022, the Building Regulations Approved Document L (efficiency / Boiler Plus requirements), and Merton Council (housing advice, property licensing, Tenants’ Champion, Housing Enforcement, conservation areas, council not owning housing stock — transfer to Merton Priory Homes / Clarion in 2010).

Cost figures are indicative London-market estimates only — not regulated rates and not official market data. Merton-specific signals are observational, drawn from local trade experience and the borough’s housing-stock mix across the postcodes and areas listed above.

Sources

¹ HSE — Domestic gas safety FAQ. https://www.hse.gov.uk/gas/domestic/faqs.htm ⁵ Gas Safe Register — Check An Engineer. https://www.gassaferegister.co.uk/find-an-engineer-or-check-the-register/check-an-engineer/ ¹³ Landlord and Tenant Act 1985, Section 11. https://www.legislation.gov.uk/ukpga/1985/70/section/11 ¹⁵ HSE — Check an engineer – are they Gas Safe registered? https://www.hse.gov.uk/gas/gas-safe-register-check.htm ¹⁷ HSE — Carbon monoxide awareness. https://www.hse.gov.uk/gas/domestic/co.htm ¹⁸ HSE — Gas safety records. https://www.hse.gov.uk/gas/landlords/gassaferecord.htm ³⁷ GOV.UK — Approved Document P (electrical safety in dwellings). https://www.gov.uk/government/publications/electrical-safety-approved-document-p ³⁹ GOV.UK — Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 (landlord/tenant explanatory booklet). https://www.gov.uk/government/publications/smoke-and-carbon-monoxide-alarms-explanatory-booklet-for-landlords/the-smoke-and-carbon-monoxide-alarm-england-regulations-2015-qa-booklet-for-the-private-rented-sector-landlords-and-tenants ⁴⁰ Housing Act 2004, Schedule 4 (mandatory licence conditions). https://www.legislation.gov.uk/ukpga/2004/34/schedule/4 ⁴⁵ GOV.UK — Approved Document L (conservation of fuel and power; includes Boiler Plus requirements for new boiler installations). https://www.gov.uk/government/publications/conservation-of-fuel-and-power-approved-document-l ⁵⁰ Merton Council — Property licensing for landlords and letting agents (selective and additional licensing schemes; designation 24 September 2023 to 23 September 2028). https://www.merton.gov.uk/council-tax-benefits-and-housing/private-housing/licensing ⁵¹ Merton Council — Tenants’ Champion and Housing Enforcement (housing condition complaints and tenant escalation). https://www.merton.gov.uk/council-tax-benefits-and-housing/housing-advice/tenants-champion and https://www.merton.gov.uk/council-tax-benefits-and-housing/private-housing/complaints-about-the-condition-of-private-housing ⁵² Merton Council — Apply for social housing (Merton Council does not own any council housing; stock transferred in March 2010 to Merton Priory Homes, now Clarion). https://www.merton.gov.uk/council-tax-benefits-and-housing/getting-a-new-home/apply-social-housing and https://www.merton.gov.uk/council-tax-benefits-and-housing/housing-advice/housing-associations-tenancy-rights ⁵³ Merton Council — Conservation areas (overview, including Article 4 directions in John Innes Merton Park and Wilton Crescent). https://www.merton.gov.uk/planning-and-buildings/design-conservation/conservation-areas ⁵⁶ Merton Council — Article 4 directions removing permitted development rights (immediate Article 4 Direction for small HMOs in seven wards from 17 November 2022 confirmed permanent 19 April 2023; immediate Article 4 Direction for small HMOs in 13 wards from 24 March 2026 subject to consultation by 19 June 2026). https://www.merton.gov.uk/planning-and-buildings/planning/permitted-development-and-prior-approval/article-4

Contact verified Gas Safe boiler servicing engineers in Merton ↑

← Back to all plumbing services in Merton

Last reviewed: May 2026 by Adiel Khan — SFEDI-accredited business advisor 20+ years experience (South East Enterprise Ltd) and operator of VerifiedPlumbers. [LinkedIn ↗]

This page is checked for compliance and regulatory accuracy against HSE, Gas Safe Register, GOV.UK legislation, Thames Water, SES Water and London Borough of Merton guidance. Source links are provided within this page where relevant.