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A directory of plumbers and Gas Safe engineers working across Clapham — from the Old Town and Clapham Common to Clapham North, Clapham Park and the Abbeville area, spanning SW4 and SW12. Every business is checked before it’s listed, so you can contact a local plumber directly with more confidence.
✅ Checked before listing — identity, insurance, trading presence, Gas Safe (where relevant).
✅ Workmanship guarantee badges on listings — 1, 3, 6 or 12 months
No booking fees, no middleman — your enquiry goes straight to the plumber, across Clapham’s SW4 and SW12 postcodes.
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Coverage: Clapham’s SW4 and SW12 core — the Old Town, Clapham Common, Clapham North, Clapham High Street, Clapham Park, Abbeville and Clapham South — with the Clapham Junction/Common fringe (SW11) on the Wandsworth side.
What this covers: every domestic plumbing job in the area — emergencies and leaks, drains, bathrooms and kitchens, appliances, taps and toilets, and the full range of boiler and central-heating work — each with its own page below.
Where to start: if you’re not sure which trade you need, the Emergency Plumber and General Plumbing pages are the broadest starting points; anything gas or heating-related routes through the boiler pages.
Costs: indicative Clapham price ranges are under What plumbing costs below — editorial estimates only.
Availability: each plumber sets their own hours — any same-day or out-of-hours cover is shown on their individual profile.
Jump to: Services · Who’s responsible — water, sewers & drains · Housing & what it means · By area · Costs · FAQs
Plumbing services in Clapham
Choose the service you need to see verified plumbers covering that work in Clapham. Each page carries local detail specific to that trade.
Emergency Plumber in Clapham — for uncontainable leaks, no water and burst pipes, with the right routing for whether it’s yours, Thames Water’s, the council’s or a housing association’s to fix.
Burst Pipes in Clapham — stop-tap location and emergency isolation for burst supply pipes and winter freezes across the area’s period stock and converted flats.
Leak Detection in Clapham — tracing hidden leaks before they become damage, including telling a genuine plumbing leak apart from surface-water and groundwater ingress.
Blocked Drains in Clapham — clearing private blockages and diagnosing whether the problem is your drain, a shared drain in a converted house, or a Thames Water sewer.
Toilet Repairs in Clapham — running, leaking and blocked WCs, cistern parts and re-seats, including the limescale wear hard Clapham water accelerates.
Tap Repair & Installation in Clapham — washers, cartridges, mixer and outside-tap work, fitted to keep the public supply protected from backflow.
General Plumbing in Clapham — the everyday repairs, replacements and small installs that don’t fit a single category.
Bathroom Plumbing in Clapham — full and partial bathroom installs in period conversions and flats, where waste falls and shared stacks matter most.
Kitchen Plumbing in Clapham — sinks, wastes and feeds, keeping the cold drinking tap on the unsoftened mains and connections correct after a refit.
Washing Machine & Dishwasher Installation in Clapham — appliance plumbing done so it can’t flood the kitchen or the flat below.
Boiler Repair in Clapham — Gas Safe diagnosis and repair of faults, fault codes and lockouts on gas boilers.
Boiler Installation in Clapham — new and replacement boilers, installed, notified and certificated by a Gas Safe registered engineer.
Boiler Servicing in Clapham — annual servicing that protects efficiency and warranties, alongside the separate legal gas safety check for landlords.
Central Heating Repair in Clapham — radiators, pumps and controls, with limescale affecting hot-water components and corrosion sludge in heating circuits treated as separate problems.
Commercial Plumbing in Clapham — work for the shops, cafés, restaurants and offices around Clapham High Street and the Common, including backflow, grease and legionella duties.
Who’s responsible for what in Clapham — water, sewers and drains
More plumbing call-outs in Clapham than people expect turn out not to be the householder’s pipes at all — and because Clapham straddles Lambeth and Wandsworth, the routing has an extra layer. Knowing who’s responsible before anyone quotes is the single most useful local check.
Water and sewers. Thames Water’s official service-area map shows water and wastewater coverage across this part of London; check the exact address where service boundaries matter.12 A drain inside your boundary serving only your property is the owner’s or landlord’s responsibility; public sewers and lateral drains are Thames Water’s, usually from the boundary since the 2011 transfer.2 Blocked or overflowing public sewers go to Thames Water on 0800 316 9800.3
Council tenants — check which borough. Clapham’s council homes are split between two authorities. Lambeth Council tenants report repairs online or on 020 7926 6000, with an out-of-hours emergency line on 020 7926 6666.4 Wandsworth Council tenants report online, with out-of-hours emergencies on the Joint Control Centre line 020 8871 8999.5
Housing-association tenants. Much of Clapham Park is managed by Metropolitan Thames Valley Housing (MTVH), the lead body on the Clapham Park regeneration; MTVH residents report repairs on 020 3535 3535, with an emergency line open 24/7.6 Other associations run their own repair lines.
Gas. If you smell gas, it isn’t a plumbing job in the first instance — leave and call the National Gas Emergency Service on 0800 111 999 from outside.7 A good Clapham plumber works through this same map — internal pipework, private drain, Thames Water sewer, which council, or which housing association — before quoting.
Clapham’s housing — and what it means for plumbing
Clapham includes converted and purpose-built flats and maisonettes, Victorian and Edwardian terraces, and conservation-area houses and villas around the Common. Lambeth’s conservation record describes the area around Clapham Common as historic 18th- and 19th-century buildings with substantial later-19th-century residential development, and the Clapham Park and Northbourne Road area as mostly villas in generous gardens.8
For plumbing, three things follow. First, converted flats can share soil stacks, risers and drains, so a leak or blockage in one flat may reach the one below, and works can need leaseholder, freeholder or managing-agent coordination. In a mansion block or purpose-built building, the first check may be whether the fault is before or after a communal isolation valve in a riser or service cupboard. Second, responsibility depends on the tenure and the exact pipe: a private tenant normally reports to the landlord or agent, while council and housing-association tenants use their provider’s repair route. Third, much of central Clapham sits in a conservation area; this is mainly relevant to visible external work such as a new flue, soil-stack alteration or outside condensate route, not an ordinary internal repair.
A concise first diagnosis also changes by service: for a leak, check the meter and isolate the incoming supply; for a blockage, establish which fixtures and neighbouring properties are affected; for a heating fault, separate limescale in hot-water components from corrosion sludge in the sealed circuit. On the Wandsworth side, a shared drain or block repair may require the Wandsworth council route or the building manager rather than a private repair to communal pipework.
The largest local regeneration is Clapham Park, led by MTVH and described as its biggest development, delivering new homes and community facilities.9 Heating arrangements should be checked building by building: where a home is connected to communal heating, a private plumber can normally work only on the resident’s internal fittings, not the communal plant or network without the responsible provider’s authority.
Find a verified plumber by area
Clapham Old Town & Clapham Common (SW4) — Georgian and Victorian houses and converted flats around the Common, much of it in conservation areas, where period pipework, shared stacks and planning-sensitive external work are the recurring themes.
Clapham North & Clapham High Street (SW4) — the busy Northern line / Overground core, with flats above the High Street’s shops and dense conversions where a leak can travel between units.
Clapham Park (SW2/SW4 edge) — the MTVH regeneration area, mixing older estate stock, villa streets around Northbourne Road and new affordable homes; confirm the heating arrangement for the individual building before booking boiler or communal-system work.
Abbeville & Clapham South (SW4/SW12) — Abbeville Village and Edwardian family terraces toward Clapham South, more house-led than the core.
Clapham Common west & the Clapham Junction fringe (SW11, Wandsworth side) — where addresses sit on the Wandsworth side or near Clapham Junction, confirm the exact postcode and borough, as the council routing changes.
What plumbing costs in Clapham
A rough orientation for common Clapham jobs, to sense-check a quote — not a price list.
| Job | Typical indicative range | Notes |
|---|---|---|
| Standard hourly / first-hour call-out | £60–£100 | Often a higher minimum for the first hour |
| Emergency / out-of-hours call-out | £120–£250+ | Nights, weekends and bank holidays cost more |
| Tap repair or replacement | £80–£180 | Plus the tap if supplied |
| Blocked drain clearance | £80–£250 | More for jetting or a shared/Thames Water sewer |
| Leak detection | £150–£400 | Depends on access and method |
| Annual boiler service | £70–£140 | Higher with parts or a plan |
| Boiler repair | £120–£400+ | Parts-dependent |
| New combi boiler supplied & fitted | £1,800–£3,500+ | Varies by model, flue run and system changes |
Editorial estimate only. These figures are not regulated rates, not market data and not a published cost survey — a general guide; actual quotes vary by job, access and time of day.
Clapham is inside the London Ultra Low Emission Zone (ULEZ), which operates 24 hours a day every day except Christmas Day, so a non-compliant van may carry the daily charge.10 Clapham addresses are outside the central Congestion Charge zone, but a route into central London can still enter it; use TfL’s separate postcode and zone checker.13 Charging rules can change, so check the current position.
Frequently asked questions
Thames Water’s official service-area map shows water and wastewater coverage across this part of London; check the exact address where a boundary matters.12 Exact water hardness varies by postcode, so check your own address with Thames Water.
Check which borough. Lambeth tenants use 020 7926 6666 for out-of-hours emergencies;4 Wandsworth tenants use 020 8871 8999;5 MTVH residents (including much of Clapham Park) use 020 3535 3535.6
A drain inside your boundary serving only your property is the owner’s or landlord’s; shared drains and public sewers are generally Thames Water’s, usually from the boundary.2
Yes — it’s in Thames Water’s hard-water region, so limescale affects taps, showers, boilers and appliances.1 The exact figure varies by postcode.
Every listing is checked before it goes live and re-verified annually — trading legitimacy, named contact, public liability insurance, and Gas Safe registration where gas work is involved — and we keep an eye on customer feedback from across the web.11
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Why verified plumbers — not a general directory
Most directories list whoever pays and leave the checking to you. Because Clapham work runs from gas boilers to leasehold conversions to two different council routing systems, the credentials that matter shift job to job — so we verify rather than just advertise.
Every listing is checked before going live and re-verified annually: we confirm the business is legitimately trading and verify the named contact, we check evidence of public liability insurance, and we confirm the plumber covers Clapham’s SW4 and SW12 postcodes before a profile is approved — and we keep an eye on customer feedback gathered from across the web. Where gas work is involved we confirm Gas Safe registration directly with the Gas Safe Register, and you should always ask to see the engineer’s Gas Safe ID card before gas work starts — the card shows the seven-digit registration and exactly which gas work they’re qualified to do. Not every plumber does gas work, so for general and water-supply jobs you can also look a plumber up yourself on WaterSafe, the free, water-industry-backed national register.
Listed plumbers pay a flat monthly fee to be listed. What that fee never buys is the verification itself — every listing is checked on the same terms — and there’s no per-enquiry middleman fee, so your enquiry goes directly to the plumber. Profiles may be suspended or removed if credentials lapse or credible concerns are raised; see the full verification process →.
Related areas
Verified plumbers across Clapham’s neighbourhoods and nearby areas, including:
- Abbeville
- Balham
- Battersea
- Brixton
- Clapham Common
- Clapham Junction
- Clapham North
- Clapham Park
- Clapham South
- Stockwell
Related guides
- London Plumbing Costs & Compliance Guide 2026
- London Hard Water — The Complete Homeowner & Landlord Guide 2026
- How to Find Your Stop Tap (London Homes)
- London Landlord Plumbing Compliance Checklist 2026
- New Homeowner Plumbing Guide — London 2026
Clapham’s plumbing is, more than anything, a question of who’s responsible — water and sewers with Thames Water, council homes split between Lambeth and Wandsworth, much of Clapham Park with MTVH, and your own pipework with you. The verified plumbers listed here know that map, and you can contact them directly without a booking fee or a middleman.
Contact verified plumbers in Clapham ↑
Last reviewed: July 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 the bodies cited on it — Thames Water, Ofwat, Lambeth Council, Wandsworth Council, Metropolitan Thames Valley Housing, the Gas Safe Register, the National Gas Emergency Service, WaterSafe and TfL. Source links are provided within this page where relevant.
Sources & further reading
1. Thames Water — hard water guidance — https://www.thameswater.co.uk/help/water-and-waste-help/water-quality/hard-water
2. Thames Water — sewer pipe responsibility — https://www.thameswater.co.uk/help/water-and-waste-help/sewer-flooding/sewer-pipe-responsibility
3. Thames Water — report a problem (0800 316 9800) — https://www.thameswater.co.uk/contact-us/report-a-problem
4. Lambeth Council — emergency contact numbers (housing 020 7926 6666) — https://www.lambeth.gov.uk/about-council/contact-us/emergency-contact-numbers
5. Wandsworth Council — council tenants request a repair (out-of-hours 020 8871 8999) — https://www.wandsworth.gov.uk/council-tenants-request-a-repair/
6. Metropolitan Thames Valley Housing — emergency repairs (020 3535 3535) — https://www.mtvh.co.uk/manage-your-home/repairs/emergency-repairs/
7. Gas Safe Register — what to do in a gas emergency — https://www.gassaferegister.co.uk/gas-emergency/what-to-do-in-a-gas-emergency/
8. Lambeth Council — conservation and heritage — https://www.lambeth.gov.uk/planning-building-control/conservation-heritage
9. MTVH — Clapham Park regeneration — https://yourclaphampark.co.uk/
10. Transport for London — Ultra Low Emission Zone — https://tfl.gov.uk/modes/driving/ultra-low-emission-zone
11. Gas Safe Register — find or check an engineer — https://www.gassaferegister.co.uk/
12. Thames Water — service-area map (water and wastewater coverage) — https://www.thameswater.co.uk/developers/larger-scale-developments/planning-your-development/where-our-pipes-are
13. Transport for London — Congestion Charge zone and postcode checker — https://tfl.gov.uk/modes/driving/congestion-charge/congestion-charge-zone