Before you contact a plumber

Check:

• Gas Safe registration (if the job involves gas) — check the current ID card and the Gas Safe Register yourself before any gas work starts
• Public liability insurance is current and applies to the work scope — ask for evidence before attendance
• The engineer covers the London postcode or borough your property sits in
• You have a written quote (or a scope-based estimate with what’s included) before work starts

How to choose between engineers once you’re in a borough:

• Match service scope to your job (gas vs non-gas; domestic vs commercial; HMO vs single dwelling)
• Confirm coverage of your specific postcode — borough coverage varies by listing
• For gas work, check the engineer’s Gas Safe registration is current and covers the appliance category
• When calling, ask what’s included in the quote and confirm access and availability windows

How many plumbers to contact: Comparing 2–3 engineers improves availability options and gives you quote comparison without excessive friction.

What happens when you contact a plumber from this directory

You contact the engineer directly — we are not in the middle of the conversation. Typically:

1. You describe the issue (photos often help — you don’t need to identify the exact part)
2. The engineer confirms availability and your postcode coverage
3. For straightforward jobs — tap, toilet, washing machine connection — you may get a same-day quote remotely from a description and photos
4. For larger work — bathrooms, kitchens, boiler installation, pipework changes — the engineer arranges a site visit to quote accurately
5. You confirm scope and price, and book direct

The engineer carries out the work. Accountability for workmanship, insurance claims and statutory compliance sits with them as the person carrying out the work — not with this directory.

Find a verified plumber in your borough

Borough hubs marked live below have been built out with full 15-service coverage, verified listings and Croydon/Bromley-equivalent compliance detail. Remaining areas are planned through 2026 — check back, or use the London-wide service pages further down if your borough isn’t yet live.

Central London — currently live

• Camden — NW1, NW3, NW5, NW6, NW8, WC1, WC2, N6, N7, N19; Georgian and Victorian terraces in Bloomsbury, Belsize Park and Primrose Hill, mansion blocks across Hampstead and Camden Town, modern developments at King’s Cross
• City of London — EC1, EC2, EC3, EC4; mostly commercial buildings, dense office stock, district heating networks, Barbican estate residential
• Islington — N1, N5, N7, N19, EC1; Georgian and Victorian terraces in Canonbury and Barnsbury, conversion flats across Highbury and Holloway, modern developments around Angel
• Kensington & Chelsea — SW1, SW3, SW5, SW7, SW10, W2, W8, W10, W11, W14; Georgian and Victorian stucco terraces, mansion blocks, listed buildings, communal heating in mansion-block stock
• Westminster — SW1, W1, W2, W9, NW1, NW8, WC1, WC2; Georgian and Victorian terraces in Marylebone, Belgravia and Pimlico, mansion blocks across Mayfair and St John’s Wood

North London — currently live

• Barnet — N2, N3, N10, N11, N12, N14, N20, NW2, NW4, NW7, NW9, NW11, EN4, EN5; suburban inter-war semis across Finchley, Hendon and Edgware, post-war housing in Burnt Oak, period stock in High Barnet
• Enfield — EN1, EN2, EN3, N9, N11, N13, N14, N18, N21; inter-war and post-war suburban stock across Enfield Town, Edmonton and Palmers Green, some rural off-grid properties in the north
• Hackney — E1, E2, E5, E8, E9, N1, N4, N16; Victorian terraces across Dalston and Stoke Newington, conversion flats in Hackney Central and Clapton, warehouse conversions in Shoreditch
• Haringey — N4, N6, N8, N10, N15, N17, N22; Victorian terraces in Crouch End and Muswell Hill, post-war housing in Tottenham, conservation areas across Highgate
• Waltham Forest — E4, E10, E11, E17; Victorian terraces in Walthamstow and Leyton, inter-war and post-war housing in Chingford

North West London — currently live

• Brent — NW2, NW6, NW9, NW10, HA0, HA9; inter-war suburban housing across Wembley and Kingsbury, Victorian terraces in Kilburn and Willesden, post-war estates
• Harrow — HA1, HA2, HA3, HA5, HA7, HA8; suburban inter-war semis, post-war housing, period stock around Harrow on the Hill
• Hillingdon — HA4, HA5, UB3, UB4, UB7, UB8, UB9, UB10; inter-war and post-war suburban stock across Uxbridge, Hayes and Ruislip, light industrial sites near Heathrow

West London — currently live

• Ealing — W3, W4, W5, W7, W13, NW10, UB1, UB2, UB6; Victorian and Edwardian terraces in Ealing and Acton, inter-war housing in Greenford, conservation areas in Ealing town centre
• Hammersmith & Fulham — W6, W12, W14, SW6; Victorian terraces in Fulham and Hammersmith, mansion blocks, modern developments along the river
• Hounslow — TW3, TW4, TW5, TW7, TW8, TW13, TW14, W4; inter-war suburban stock across Hounslow and Feltham, period housing in Chiswick, light industrial near Heathrow
• Richmond upon Thames — TW1, TW2, TW9, TW10, TW11, TW12, KT1, KT2, SW13, SW14; Victorian and Edwardian terraces in Richmond and Twickenham, mansion blocks, riverside flats, conservation areas across Richmond and Kew

East London — currently live

• Barking & Dagenham — IG11, RM6, RM8, RM9, RM10; inter-war and post-war housing across the Becontree estate, riverside developments along the Thames
• Havering — RM1, RM2, RM3, RM4, RM5, RM7, RM11, RM12, RM13, RM14; suburban inter-war and post-war stock across Romford, Hornchurch and Upminster, some rural off-grid properties
• Newham — E6, E7, E12, E13, E15, E16, E20; Victorian terraces across East Ham and Forest Gate, modern developments around Stratford and the Olympic Park
• Redbridge — IG1, IG2, IG3, IG4, IG5, IG6, IG7, IG8, E11, E12, E18; inter-war suburban housing across Ilford, Wanstead and Woodford, Victorian terraces in Forest Gate borders
• Tower Hamlets — E1, E2, E3, E14; Victorian terraces in Bethnal Green and Mile End, warehouse conversions in Wapping and Limehouse, modern developments at Canary Wharf

South East London — currently live

• Bexley — DA postcodes, predominantly inter-war and post-war suburban stock
• Bromley — BR postcodes plus SE19, SE20, TN16; London’s largest borough by area, varied from Victorian terraces to rural off-grid properties
• Greenwich — SE postcodes; riverside new-builds alongside Victorian and Edwardian terraces
• Lambeth — SW2, SW4, SW8, SW9, SW12, SW16, SE1, SE5, SE11, SE19, SE21, SE24, SE27; Victorian and Edwardian conversion flats across Brixton, Clapham, Stockwell and Streatham, Georgian terraces in Kennington and Vauxhall, modern riverside developments at Nine Elms, Waterloo and South Bank
• Lewisham — SE postcodes; dense Victorian terraced stock with significant social housing
• Southwark — SE1, SE5, SE15, SE16, SE17, SE21, SE22, SE23; warehouse conversions, district heating networks, purpose-built blocks

South West London — currently live

• Kingston upon Thames — KT1, KT2, KT3, KT5, KT6, KT9; suburban housing around Kingston town centre and Surbiton, period stock and riverside flats along the Thames
• Merton — SW19, SW20, CR4, SM4; Victorian terraces in Wimbledon and Colliers Wood, post-war housing in Mitcham and Morden
• Sutton — SM1, SM2, SM3, SM5, SM6, SM7, KT4, CR0; inter-war and post-war suburban stock across Sutton town centre, Carshalton, Wallington and Cheam
• Wandsworth — SW8, SW11, SW12, SW15, SW17, SW18, SW19; Victorian and Edwardian terraces across Battersea, Clapham, Tooting and Putney, mansion blocks, modern riverside developments at Nine Elms

South London — currently live

Croydon — CR0, CR2, CR5, CR7, CR8, SE25, SW16; Victorian terraces in the north, inter-war semis in the south

If your borough isn’t yet live, use the London-wide service pages below rather than choosing a neighbouring borough. The service pages link to engineers covering multiple boroughs and will route more accurately than assuming a neighbouring hub applies.

London plumbing services — all 15 service pages

Not sure which service page applies? Start with the service closest to your issue. Engineers listed can diagnose and route the job if the exact category isn’t clear.

Emergency and repair

• Emergency Plumber London — urgent and out-of-hours plumbers across London; availability varies by listing
• Burst Pipes London — isolation, repair and damage limitation
• Leak Detection London — trace and access, hidden and supply pipe leaks
• Blocked Drains London — kitchen, bathroom and external drains

Taps, toilets and general plumbing

• Tap Repair & Installation London — washers, cartridges, mixer taps
• Toilet Repairs London — cisterns, flush valves, full replacements
• General Plumbing London — all domestic plumbing repairs and installations

Rooms and appliances

• Bathroom Plumbing London — full suite installation, shower fitting, waste connections. Note: certain fittings (e.g. bidets with ascending spray, RPZ valves, cisterns supplying water by gravity to more than one property) require notification to the water undertaker under Regulation 5 of the Water Supply (Water Fittings) Regulations 1999.⁶
• Kitchen Plumbing London — sinks, taps, waste, appliance connections. Note: gas hob and cooker connections must only be carried out by a Gas Safe registered engineer with the correct appliance category.¹
• Washing Machine & Dishwasher Installation London — supply, waste, backflow protection

Heating and boilers

• Boiler Repair London — all makes, Gas Safe registered engineers with the correct appliance category only¹
• Boiler Installation London — gas boilers require Gas Safe registration and correct appliance categories; oil boiler installations must comply with Building Regulations — installers registered with a Competent Person Scheme (e.g. OFTEC) can self-certify, otherwise work must be notified to Building Control; LPG requires specific LPG qualification — confirm engineer qualification before booking
• Boiler Servicing London — annual boiler service. Note: landlords also require an annual Gas Safety Check producing a legally required Gas Safety Record (often referred to informally as a ‘CP12’ — this term is not used in legislation).³
• Central Heating Repair London — radiators, pumps, zone valves, power flush

Commercial

• Commercial Plumbing London — offices, HMOs, landlord properties, plumbing works associated with Legionella control measures. Note: risk assessment and ongoing control may require input from a competent person — someone with sufficient knowledge of Legionella risk and control measures as defined in HSE ACoP L8.⁴

Why London plumbing is different

Hard water — predominantly hard to very hard across London

The majority of London is supplied by Thames Water and classified as hard to very hard. Thames Water confirms that most of the London supply is drawn from rivers and groundwater passing through chalk and limestone, producing limescale on appliances and fittings.² Small parts of outer London are supplied by other water undertakers — confirm the undertaker for your address if needed.

Limescale accumulates on tap cartridges, shower valves, cistern inlet valves and boiler heat exchangers, increasing maintenance needs and reducing heating efficiency over time. A plumber working regularly across London factors this in as standard — fitting inhibitors, advising on softeners, and building descaling into maintenance conversations.

Age and variety of housing stock

Many London boroughs include substantial pre-war housing stock. Victorian and Edwardian terraces — common across inner north, east and south London — frequently carry original copper pipework, lead supply pipes where still present, and drainage that has been patched repeatedly over a century rather than replaced.

Thames Water advises that lead supply pipes can affect drinking water quality and recommends replacement where identified.⁵ Inter-war semi-detached stock across outer west and south London often retains gravity-fed hot water systems never designed for modern combi boiler flow rates. Each borough hub covers the specific property profile for that borough in detail.

High-rise and new-build developments

Large stretches of East and South East London — Canary Wharf, Stratford, Greenwich Peninsula, Nine Elms — have seen major high-rise residential development. These buildings operate pressurised systems, communal booster pumps and building management infrastructure. Many have contractor approval requirements through freeholders or managing agents. A plumber already familiar with these buildings avoids the risk of approval delays or rejection on arrival.

Logistics and access

Parking restrictions, resident permit zones, ULEZ compliance and building check-in procedures all add time before a single tool is picked up. A plumber already working regularly in your borough has these accounted for.

Landlords in London — core plumbing obligations

Landlord obligations are largely set by national legislation, but licensing schemes vary significantly between London councils — many also operate additional HMO and/or selective licensing schemes that impose further property conditions. Check the individual borough hub for local licensing position.

Repairs and maintenance

Section 11 of the Landlord and Tenant Act 1985 requires landlords to keep in repair and proper working order the installations for the supply of water, gas and electricity and for sanitation — including basins, sinks, baths and sanitary conveniences.⁷

Annual Gas Safety Check

Under the Gas Safety (Installation and Use) Regulations 1998, landlords must arrange an annual Gas Safety Check of all relevant gas appliances and flues by a Gas Safe registered engineer. The legally required document is the Gas Safety Record. Landlords must issue a copy to each tenant within 28 days of the check, and to new tenants before they move in (HSE guidance).³

Legionella risk

Legal duty: Landlords have a legal duty to assess Legionella risk in the course of their letting activities — which constitute a business activity — under the Health and Safety at Work etc. Act 1974 and, where applicable, the Control of Substances Hazardous to Health Regulations 2002.

Guidance: HSE Approved Code of Practice L8 provides practical guidance on meeting that duty. For most single domestic properties with regular water use, a basic assessment by a competent person is sufficient. HMOs and properties with stored water systems have higher risk profiles.⁴

Licensing — vary by council

Mandatory HMO licensing applies nationally to large HMOs and is administered by the council. Many London councils also operate additional HMO and/or selective licensing schemes. Check your council’s property licensing pages, or use GOV.UK to find the relevant council and licence route.

The London Landlord Plumbing Compliance Checklist covers these obligations in full.

How we verify plumbers on this directory

Every plumber we list passes our verification process before going live. No plumber is listed or charged until they have passed verification.

Important limitations: Our verification is an editorial process — not a regulatory or statutory standard. We are not a regulator and we do not adjudicate disputes between users and listed traders. Our verification is point-in-time at the date of listing. We do not monitor ongoing compliance or workmanship after listing. Our verification does not guarantee ongoing compliance or workmanship quality. Listings are re-verified on renewal — any listing that cannot be re-verified is removed, regardless of subscription status.

Identity — We review evidence of business identity and trading name against documents supplied at onboarding, including company registration or sole trader records.

Insurance — We review evidence of current public liability insurance against documents supplied at onboarding. We review evidence supplied — we do not underwrite or guarantee coverage, do not confirm validity at time of work, and do not guarantee that cover applies to your specific job. Ask the engineer to confirm current cover before attendance.

Gas Safe registration — For gas work pages, we check registration against the live Gas Safe Register at time of listing using the engineer’s current 7-digit licence number from their current ID card. It is a legal requirement under the Gas Safety (Installation and Use) Regulations 1998 that anyone carrying out gas work must be Gas Safe registered.¹ Registration status can change between our check and your booking — HSE says it is your responsibility to check the engineer’s current registration on the Gas Safe Register and to check the back of the ID card for the correct appliance categories before work begins.

WaterSafe registration — WaterSafe is an approved contractor scheme, not a statutory requirement. Legal compliance for water fittings work is governed by the Water Supply (Water Fittings) Regulations 1999. Where WaterSafe registration is held, we review the evidence and ask the installer to confirm whether the specific work falls within the scope of that approval. Certain works — e.g. bidets with ascending spray, RPZ valves, cisterns supplying water by gravity to more than one property — are notifiable under Regulation 5. The person proposing to carry out notifiable work must give notice to the water undertaker and must not begin without consent, unless an exemption applies.⁶ Failure to notify where required can lead to enforcement action by the water undertaker.

Reputation — We carry out a manual cross-platform review check across Google, Yell, Checkatrade and Trustpilot at time of listing. Patterns of poor reviews, unresolved complaints or unexplained gaps in trading history are grounds for rejection. This is an editorial check — not a Trading Standards or statutory assessment.

Service area — We confirm coverage of the relevant postcode areas before a listing goes live. Coverage varies by listing — check each listing for the specific areas covered.

Our verification process covers identity and trading records, current public liability insurance evidence, Gas Safe registration against the live register at time of listing (where applicable), WaterSafe/approved contractor evidence where held, manual cross-platform reputation check, and postcode service-area confirmation. Full process and limitations →

Corrections and complaints — If you believe a listing is inaccurate or a trader has behaved improperly, contact us directly via the site contact page. We are not a regulator and do not adjudicate disputes. Where a complaint is upheld, our action is limited to removing or restricting the listing. We aim to review complaints within five working days. Rogue trader concerns should additionally be reported to the Citizens Advice Consumer Service on 0808 223 1133.

Typical plumbing costs in London — 2026

Indicative directory-derived ranges. Figures are based on active listings across our 6 currently live London boroughs (Bexley, Bromley, Croydon, Greenwich, Lewisham, Southwark). Ranges exclude VAT unless otherwise stated. Prices vary by property type, access, system complexity and area within London — central and inner London rates often run higher than outer boroughs. Emergency and out-of-hours rates carry a significant premium. Figures are not market averages and not quotes from every listed plumber. Last updated April 2026.

Simple jobs (tap, toilet, washer, dishwasher connection) are often quoted remotely from a description and photos. Medium jobs (single-room plumbing, installation) typically get an estimate with final confirmation on arrival. Large jobs (bathrooms, kitchens, boiler installation, pipework changes) usually require a site visit to quote accurately. Ask whether the figure is a fixed price or a starting estimate, whether callout is included, and whether parts are itemised separately. Always obtain a written quote before work starts.

Methodology: ranges derived from live listings and our own published borough and service price pages across the six boroughs named above, reviewed April 2026. Ranges are not guarantees and do not replace a written quote from the engineer attending.

See the full London Plumbing Costs & Compliance Guide 2026 for breakdowns by service and borough.

Frequently asked questions

Related guides

• London Plumbing Costs & Compliance Guide 2026
• London Hard Water — The Complete Homeowner & Landlord Guide 2026
• London Landlord Plumbing Compliance Checklist 2026
• Victorian Terrace Plumbing Guide — London 2026
• New Homeowner Plumbing Guide — London 2026
• Should I Repair or Replace My Boiler? The London Homeowner’s Guide 2026
• How to Read a Plumbing Quote — A London Homeowner’s Guide 2026
• Combi vs System Boiler Guide
• Boiler Fault Codes
• How to Find Your Stop Tap (London Homes)

About Verified Plumbers

Verified Plumbers is a London plumbing directory covering all 32 London boroughs plus the City of London. We focus entirely on plumbers — not general trades, not handymen — and every profile is reviewed manually before it goes live.

We were founded in London because a city this size, with housing this varied and water this hard, deserves a directory that understands what it’s listing. The six boroughs currently live (Bexley, Bromley, Croydon, Greenwich, Lewisham, Southwark) have been built out with full 15-service coverage and detailed compliance content; remaining areas are rolling out through 2026 on the same pattern.

The directory is free for homeowners and residents to use. Gas Safe registered plumbers working in London who want to be considered for listing (listing is a paid annual subscription, subject to passing verification) can visit our join the directory page.

Last reviewed: April 2026.