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

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

Active leak, burst pipe, no working water, no heating in cold weather? See Emergency Plumber Merton or Burst Pipes Merton for immediate routing.

If you smell gas, hear hissing or suspect a gas leak, call the National Gas Emergency Service on 0800 111 999 immediately (free, 24/7).¹ Open doors and windows, shut off the gas supply at the meter if you know where it is, and do not switch electrical switches on or off. Do not smoke, use naked flames, or use a mobile phone near the suspected leak.¹

Find the right service

Pick the page that matches your problem for service-specific guidance, regulatory context, indicative costs and a filtered list of plumbers covering that service in Merton.

Emergencies and urgent water issues

• Emergency Plumber Merton — out-of-hours, urgent callouts, no working water, escape of water
• Burst Pipes Merton — burst pipes, active leaks, mains isolation, frozen pipework

Boilers, heating and gas

• Boiler Repair Merton — boiler not working, no hot water, no heating, fault diagnosis
• Boiler Servicing Merton — annual service, Landlord Gas Safety Records, landlord servicing
• Boiler Installation Merton — new boiler, replacement, system change, MCS for heat pumps
• Central Heating Repair Merton — radiators cold, system not balanced, pump issues, system flush

Drains, leaks and water supply

• Blocked Drains Merton — blocked drains, slow-draining sinks, foul smell, soil pipe blockages
• Leak Detection Merton — hidden leaks, damp patches, unexplained water bills, leaks you can’t find
• General Plumbing Merton — stop tap repairs, isolation valves, radiator swaps, cold water tank work, lead supply pipe replacement

Bathrooms, kitchens and fittings

• Bathroom Plumbing Merton — new bathroom, refurb, ensuites, shower install, bath replacement
• Kitchen Plumbing Merton — kitchen refurb, sink and tap install, appliance connections
• Tap Repair / Installation Merton — tap repair, replacement, dripping taps, outdoor taps
• Toilet Repairs Merton — running cisterns, weak flush, leaking WC, replacement, macerator
• Washing Machine & Dishwasher Installation Merton — washing machine and dishwasher installation, replacement and reconnection

Commercial premises

• Commercial Plumbing Merton — cafes, restaurants, offices, salons, retail units, multi-let buildings, fit-outs, planned maintenance

Areas covered

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

• Wimbledon (SW19, SW20)
• Wimbledon Park (SW19)
• South Wimbledon (SW19)
• Wimbledon Village and Wimbledon Hill (SW19)
• Colliers Wood (SW19)
• Merton Park (SW19, SW20)
• Crooked Billet (SW19)
• Raynes Park (SW20)
• Cottenham Park, Copse Hill (SW20)
• Motspur Park (KT3, SW20 — partly)
• Morden, Lower Morden, Morden Park (SM4)
• St Helier (SM4 — partly, also Sutton)
• Mitcham, Mitcham Common (CR4)
• 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.

What’s different about plumbing in Merton

Merton’s housing stock spans Victorian and Edwardian terraces (Wimbledon, Raynes Park), 1930s suburban semis (Morden, Mitcham, Raynes Park), interwar and post-war estates (Mitcham, Pollards Hill, St Helier), and modern flats in central areas (Colliers Wood, South Wimbledon). Three patterns commonly affect plumbing routing:

• Older terraces in Wimbledon and west Merton. Supply pipework on Victorian and Edwardian properties may include older copper or lead. Lead supply pipe replacement is a frequently encountered general plumbing job — note that lead supply pipe replacement may involve both customer-side pipework and water-company apparatus depending on where the pipe is located, so scoping should include identifying the boundary. Cold water tanks in lofts persist where vented systems haven’t been converted to combi boilers; vented-to-combi conversion is a typical upgrade. Older supply arrangements can be associated with low mains pressure and may need supply-side investigation.
• Housing-association properties. Housing-association-managed plumbing repairs typically route through the housing association — tenants may need to report repairs through the housing association rather than appointing a contractor directly. Check tenancy paperwork for the right route.
• Flats and shared buildings. Communal supply risers and waste stacks need managing-agent permission for any work that engages them. Many newer developments have isolation arrangements at each fitting; older converted flats may not.

Hard water can affect the lifespan and efficiency of household plumbing fixtures and appliances across the borough — see Hard water across the borough below.

Water suppliers in Merton

Water supply across Merton is split between two suppliers:

• Thames Water supplies most of the borough.⁶³
• SES Water supplies parts of Mitcham, Morden and Pollards Hill.⁶⁴

In SES Water-supplied areas, wastewater services may be provided by Thames Water or Southern Water depending on the address — customers may receive separate bills, or a combined bill from SES Water that includes wastewater charges collected on behalf of the wastewater company.⁶⁴

Thames Water confirms that all water in their region is hard due to the chalky limestone geology underlying south-east England.⁶³ Merton is generally in a hard-water area; check hardness by postcode with Thames Water or SES Water (your supplier depends on the address).

Hard water across the borough

Merton is generally in a hard-water area; check hardness by postcode with Thames Water or SES Water depending on the address. Hard water can affect the lifespan and efficiency of household plumbing fixtures and appliances:

• Heating element scaling (kettles, washing machines, dishwashers, boilers) — reduces efficiency and shortens element life. Water softeners and scale-reducing devices are common upgrades in hard-water areas.
• Fill valve scaling — cold water tank float valves and toilet cistern fill valves typically need replacement at periodic intervals.
• Showerhead and tap scaling — common cosmetic and flow-related issue; descaling or replacement is straightforward.
• Isolation valve seizure — under-sink isolation valves and stopcocks can scale up over years of inactivity. Periodic operation (once or twice a year) reduces seizure risk.

For broader prevention discussion, see our London Hard Water Guide.

Council, housing and licensing in Merton

This section is general guidance only, not legal, planning or surveying advice. Check Merton Council’s live pages for the current confirmed position on any specific scheme.

No council housing. Merton Council does not own any council housing — ownership transferred to Merton Priory Homes (now Clarion Housing) in March 2010.⁵² For former Merton Council stock, current tenant contact, repairs reporting and tenancy queries route through Clarion. Other housing associations also operate in Merton with their own contact arrangements.

Tenant escalation. Merton Council’s Tenants’ Champion can help escalate unresolved housing-association repairs.⁵¹ The council’s Housing Enforcement team intervenes where landlord (private or HA) repair failures meet the threshold for action — assessed under the Housing Health and Safety Rating System (HHSRS).⁵¹ ⁶²

Private renters and landlords. Section 11 of the Landlord and Tenant Act 1985 places repair duties for water supply and sanitation on landlords for tenancies in scope.¹³ The Renters’ Rights Act 2025 commenced key private assured tenancy reforms on 1 May 2026.⁶⁰ For full landlord plumbing compliance detail, see our Landlord Plumbing Compliance Checklist.

Property licensing. Merton operates selective licensing in four wards (Figge’s Marsh, Graveney, Longthornton, Pollards Hill) and additional HMO licensing in seven wards (those four plus Colliers Wood, Cricket Green, Lavender Fields), running 24 September 2023 to 23 September 2028. Mandatory HMO licensing applies nationally to larger HMOs meeting the Housing Act 2004 criteria. Check Merton Council’s property licensing pages for the live position.⁵⁰ ⁴⁰

Article 4 — borough-wide HMO control. Permitted development rights for converting homes (Use Class C3) to small HMOs (Use Class C4) have been removed across all 20 wards through two Article 4 Directions — the first (seven wards) confirmed permanent in 2023, the second (remaining thirteen wards) in force from 24 March 2026. Planning permission is required for C3-to-C4 small HMO conversions anywhere in Merton. Check Merton Council’s Article 4 page for the current confirmed position of the second direction (immediate directions are subject to confirmation).⁶¹

Conservation areas. Conservation-area controls usually engage the external appearance of buildings rather than internal plumbing alterations. New external pipework on visible elevations could engage controls in conservation areas including John Innes (Merton Park) and John Innes (Wilton Crescent).⁵³

For service-specific tenant / landlord routing, see the relevant service page above.

Indicative plumbing costs in Merton

Figures below are an editorial estimate only — observed across independent contractors and directories in early 2026, not regulated rates, and not a substitute for written quotations. Pricing varies by job complexity, access, and time of call. Each service page has more detailed cost guidance.

Confirm pricing structure (call-out, hourly, fixed quote, after-hours premium, parts mark-up, minimum charge) when you contact the plumber.

Why directory-listed plumbers

Every plumber in our directory is checked for identity, insurance, trading presence and Gas Safe registration where relevant before listing, and rechecked annually. Listing checks are administrative only and do not guarantee workmanship quality or ongoing compliance. For full verification methodology, see How we verify plumbers.

We are not a regulator or certification body; listing checks do not replace user verification on the day. Gas Safe registration is only relevant where gas work is undertaken — for water-side plumbing it doesn’t apply. For commercial gas work, verify the engineer’s non-domestic Gas Safe categories — categories on the engineer’s ID card confirm the specific gas work the engineer is qualified to undertake.⁶⁹

Some plumbers offer workmanship guarantees of 3, 6 or 12 months — look for the badge on the listing. Workmanship guarantees vary in scope, are not standardised, and are not insurance-backed unless explicitly stated. Statutory rights under the Consumer Rights Act 2015 still apply for consumers; commercial contracts are governed by their terms and applicable business-to-business sale and supply law.

Public liability insurance is not statutory for plumbers but is commonly requested by landlords, agents, blocks and commercial clients. Evidence of public liability insurance was provided at the time of listing; confirm current cover with the contractor before booking.

Always confirm pricing, scope and call-out terms on the call before booking.

Frequently asked questions

Related guides

• London Hard Water Guide
• London Plumbing Costs & Compliance Guide 2026
• How to Read a Plumbing Quote
• Victorian Terrace Plumbing Guide — London 2026
• New Homeowner Plumbing Guide — London 2026
• Landlord Plumbing Compliance Checklist

Closing

Two water suppliers cover Merton — Thames Water across most of the borough, SES Water in parts of Mitcham, Morden and Pollards Hill. In SES Water areas, wastewater services may be provided by Thames Water or Southern Water, with SES Water sometimes collecting charges on their behalf. Hard water can affect appliance and fittings service life across the borough. The borough’s HMO planning controls now cover all 20 wards through two Article 4 directions.

The service pages above route to the right starting point. Plumbers covering Merton across all services are listed at the top. Confirm scope, pricing, insurance and call-out terms on the call — before any work starts.

Sources

¹ HSE — What should I do if I smell gas? (National Gas Emergency Service: 0800 111 999, free, 24/7; immediate steps include opening doors and windows, shutting off the gas supply at the meter if known, not switching electrical switches on or off, not smoking, not using naked flames, and not using a mobile phone near the suspected leak). https://www.hse.gov.uk/gas/domestic/faqsmellgas.htm ¹³ Landlord and Tenant Act 1985, Section 11. https://www.legislation.gov.uk/ukpga/1985/70/section/11 ⁴⁰ Housing Act 2004 — HMO licensing framework. https://www.legislation.gov.uk/ukpga/2004/34/contents ⁵⁰ Merton Council — Property licensing for landlords and letting agents. https://www.merton.gov.uk/council-tax-benefits-and-housing/private-housing/licensing ⁵¹ Merton Council — Tenants’ Champion and Housing Enforcement. https://www.merton.gov.uk/council-tax-benefits-and-housing/housing-advice/tenants-champion ⁵² Merton Council — Apply for social housing (2010 stock transfer to Merton Priory Homes / Clarion Housing). https://www.merton.gov.uk/council-tax-benefits-and-housing/getting-a-new-home/apply-social-housing ⁵³ Merton Council — Conservation areas. https://www.merton.gov.uk/planning-and-buildings/design-conservation/conservation-areas ⁶⁰ Renters’ Rights Act 2025 (Royal Assent 27 October 2025; Commencement No. 2 Order — Chapter 1 of Part 1 in force 1 May 2026 for private assured tenancies). https://www.legislation.gov.uk/ukpga/2025/26/contents and https://www.legislation.gov.uk/uksi/2026/421/note/made ⁶¹ Merton Council — Article 4 directions. https://www.merton.gov.uk/planning-and-buildings/planning/permitted-development-and-prior-approval/article-4 ⁶² GOV.UK — Housing Health and Safety Rating System guidance. https://www.gov.uk/government/publications/housing-health-and-safety-rating-system-guidance-for-landlords-and-property-related-professionals ⁶³ Thames Water — Hard water in your area. https://www.thameswater.co.uk/help/water-and-waste-help/water-quality/hard-water ⁶⁴ SES Water — Sewerage services. https://seswater.co.uk/your-account/sewerage-services ⁶⁵ Thames Water — Find and use your inside stop valve. https://www.thameswater.co.uk/help/water-and-waste-help/how-to-turn-your-water-on-and-off/how-to-find-and-use-your-inside-stop-valve ⁶⁹ Gas Safe Register — The Gas Safe ID card categories. https://www.gassaferegister.co.uk/gas-safety/the-gas-safe-id-card/the-gas-safe-id-card-categories/

For service-specific regulatory sourcing (Water Regulations 1999, Gas Safety Regs 1998, Approved Documents, ACOP L8, Workplace Regs 1992, MCS, OFTEC, BS 7671), see the relevant service page.

Last reviewed: May 2026. Reviewed by the VerifiedPlumbers editorial team for regulatory accuracy. Source links are provided within this page where relevant.