A plumbing emergency is the worst time to be vetting a stranger off a search result. Browse Barnet plumbers whose identity, insurance and trading history we’ve already checked, for urgent jobs across the borough — from a burst pipe in a Finchley flat to no water in an Edgware house.

✅ 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

⚠️ Smell gas or suspect a leak? Leave the property and call the National Gas Emergency Service on 0800 111 999 from outside — don’t switch anything electrical on or off.
Worried about carbon monoxide (headache, dizziness, nausea)? Treat it as urgent — see Safety first ↓

Contact verified emergency plumbers in Barnet ↓

Coverage: Barnet postcodes including EN4, EN5, N2, N3, N11, N12, N14, N20, NW2, NW4, NW7, NW9, NW11 and HA8.
What this covers: urgent plumbing — burst pipes, major leaks, no water, overflowing drains and sudden heating loss. Gas emergencies go to National Gas first (above).
Where to start: burst pipe → Burst Pipes; a leak you can’t find → Leak Detection; drains overflowing → Blocked Drains; boiler dead → Boiler Repair.
Availability: some listed plumbers offer 24-hour or out-of-hours cover — it varies by plumber, so check the listing.
Good to know: in a Barnet emergency the first call isn’t always a plumber — gas, no-water and public-sewer flooding each have their own line. More below.

Jump to: First five minutes · Call the right number · Safety first · By district · Costs · FAQs · Why verified

Is it really an emergency? What to do in the first five minutes

Not everything that feels urgent at 11pm needs an out-of-hours call-out — and a couple of things that look minor really can’t wait. As a rough guide, a true emergency is water you can’t stop (a burst pipe, a tank overflowing, water near electrics), no water at all, sewage backing up into the home, or any smell of gas. A dripping tap, a slightly running toilet or a single cold radiator will almost always keep until morning and cost you less in daylight.

If it is urgent, the first five minutes are about making it safe, not fixing it:

• Stop the water. Turn off the internal stop tap (usually under the kitchen sink or where the main enters the house). If you’ve never found yours, our guide on how to find your stop tap is worth two minutes now rather than mid-flood. For a single appliance, use its own isolation valve.
• Protect against electrics. If water is near light fittings, sockets or the consumer unit, switch off the electricity at the consumer unit — don’t touch anything electrical that’s already wet.
• Kill a heating leak at source. If the leak is from the boiler, a radiator or a cylinder, turn the heating off and, for a cylinder, turn off its water feed to stop it refilling.
• Contain and record. Catch what you can, move valuables, and photograph the damage for insurance before anyone starts work.
• Then call. Once it’s safe, work out who to call — which isn’t always a plumber. That’s next.

Whether it’s a burst, a hidden leak or a blockage changes who you need: a burst pipe is a different job from a hidden leak you can’t trace or drains backing up.

In a Barnet emergency, call the right number first

Reaching for a local plumber is the instinct — but in several Barnet emergencies someone else holds the duty (and the cost), and calling them first is faster and free. Barnet Council sets out who’s responsible for what, and it isn’t always you.⁴

• Smell of gas or suspected carbon monoxide → the National Gas Emergency Service on 0800 111 999, not a plumber — and gas work itself must be done by a Gas Safe registered engineer (see Safety first below).
• No water at all, or a burst main in the street → your clean-water supplier. In Barnet that’s either Thames Water or Affinity Water depending on your postcode: the Drinking Water Inspectorate lists Barnet within both Affinity Water’s⁵ and Thames Water’s¹¹ areas of supply — so check yours rather than assume. If Affinity Water serves you, its 24-hour emergency line is 0345 357 2407.⁶
• Sewage backing up beyond your boundary, or an overflowing manhole in the street → Thames Water, which Barnet Council confirms is responsible for public sewers across the whole borough, on 0800 316 9800.⁴
• You rent from the council → repairs to Barnet Council homes go through Barnet Homes, which runs a 24-hour emergency repair line on 020 8080 6587.⁷
• A flooded road or a blocked highway gully → that’s the council, on 020 8359 2000 out of hours.⁴

When the problem is inside your boundary — your pipework, your appliances, your heating — that’s when a verified plumber from the list above is the right first call.

Safety first

If you smell gas or suspect a leak, follow the order the Health and Safety Executive and National Gas set out:¹

1. Don’t switch anything electrical on or off, don’t use a naked flame, don’t smoke, and don’t use a mobile phone near the suspected leak.
2. Open doors and windows to ventilate, if it’s safe to do so.
3. If you know where the meter control valve is and can reach it safely, turn off the gas at the meter — unless the meter is in a cellar.
4. Leave the property if the smell is strong or anyone feels unwell.
5. Call the National Gas Emergency Service on 0800 111 999 from outside, and don’t go back in until a gas engineer gives the all-clear.

Carbon monoxide (CO) is a separate danger you can’t see, smell or taste. A poorly-running gas appliance — or any fuel-burning appliance — can produce it, and the HSE lists symptoms including headaches, dizziness, nausea, breathlessness, collapse and loss of consciousness, which are easy to mistake for flu and most dangerous when you’re asleep.² Warning signs on an appliance include lazy yellow flames instead of crisp blue, black or sooty marks, and a pilot light that keeps going out. If you suspect CO: get into fresh air, turn the appliance off, call 0800 111 999, and seek medical help — you can also use the HSE Gas Safety Advice Line on 0800 300 363.¹

Only a Gas Safe registered engineer may work on gas. The Gas Safe Register is the official list of engineers legally allowed to fit, fix or service gas appliances — always ask to see the engineer’s Gas Safe ID card, the back of which shows exactly what gas work they’re qualified to do.³ A non-registered person may carry out “wet” work on water pipes and radiators, but work on a gas boiler itself must be Gas Safe.

Fit a carbon monoxide alarm. The HSE advises an audible alarm that complies with BS EN 50291 and carries a Kitemark or equivalent approval mark, installed and maintained in line with the manufacturer’s instructions.² An alarm is a precaution, not a substitute for an annual check by a Gas Safe engineer. If you rent, your landlord must keep the gas appliances, flues and pipework they provide in safe condition and arrange the annual gas safety check; you can ask for a copy of the Gas Safety Record. Our London Landlord Plumbing Compliance Checklist sets out the rental duties in full.

Find a verified emergency plumber by district

Barnet runs across the EN, N, NW and HA postcodes, and what slows an emergency down differs from one to the next.

• Chipping Barnet & the northern edge (EN4, EN5) — High Barnet, New Barnet, East Barnet, Arkley, Totteridge, Monken Hadley, Hadley Wood. Older town-centre buildings and larger rural-edge plots can have awkwardly placed or stiff stopcocks, so knowing your shut-off in advance saves minutes in a burst. This corner is also the most likely to be on Affinity Water rather than Thames, so for a no-water emergency the right supplier line matters.
• Finchley & Friern Barnet (N2, N3, N11, N12) — Finchley, Friern Barnet, North Finchley, Whetstone, Woodside Park. Converted flats and terraces mean a leak in an upstairs flat quickly becomes the downstairs neighbour’s emergency, so fast isolation is everything. Friern Barnet also sits in a recognised surface-water flood area, so after heavy rain a “flood” may be drainage, not your pipes.
• Golders Green, Temple Fortune, Hampstead Garden Suburb & Childs Hill (NW2, NW11) — purpose-built parades with flats above shops share waste stacks, so an out-of-hours emergency often hinges on getting freeholder or managing-agent access to communal areas. Hampstead Garden Suburb’s conservation status can affect any external work.
• Hendon, West Hendon, Brent Cross & Colindale (NW4, NW9) — the regeneration heartland is full of managed blocks where the fault, and the shut-off, may be in a communal riser or plant room rather than your flat. New Brent Cross Town homes on the development heat network have no individual boiler to isolate, so a heating fault routes to the building’s system.
• Mill Hill, Edgware & Burnt Oak (NW7, HA8, NW9) — a mix of suburban homes and the Silk Stream / Burnt Oak Brook catchment, where heavy-rain flooding can be surface water rather than a burst pipe. Edgware (HA8) is a boundary area where the clean-water supplier check is essential before you report a no-water emergency.

What an emergency plumber costs in Barnet

The figures below are an editorial estimate only — they are not regulated rates, not market data and not a published cost survey. Emergency pricing varies most of all, by time of day, how much needs replacing and parts availability. Always confirm the call-out charge and hourly rate before the plumber sets out.

A no-water or public-sewer emergency that turns out to be the water company’s responsibility shouldn’t cost you a plumber’s fee at all — which is exactly why the routing above matters. On vehicles: the whole borough is inside the Ultra Low Emission Zone, London-wide since 29 August 2023, so a non-compliant van attracts the daily charge, though most working vans now meet the standard; Barnet is outside the central Congestion Charge zone.⁹ Our London Plumbing Costs & Compliance Guide helps you sense-check an emergency quote.

Frequently asked questions

Why verified plumbers — not a general directory

In an emergency you don’t have time to check whether someone is who they say they are — so the checks need to be done before you ever call. That’s the whole idea here.

Every listing is checked before it goes 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 Barnet’s postcodes before a profile is approved. Because an emergency can be a gas emergency, where a plumber does gas work we confirm Gas Safe registration directly with the Gas Safe Register — and we’d always tell you to ask to see the engineer’s Gas Safe ID card before gas work starts.³ For work that affects your water supply you can also look a plumber up yourself on WaterSafe, the free, water-industry-backed national register.¹⁰

We keep watching after listing too — we monitor customer feedback from across the web, and profiles may be suspended or removed if credentials lapse or credible concerns are raised. See the full verification process →. What we don’t do is tell a plumber how to run their business or rank anyone higher for paying more: there’s no pay-to-play ranking and no per-enquiry middleman fee. Enquiries go directly to the plumber.

Related areas

Verified plumbers across Barnet’s neighbourhoods, including:

• Arkley
• Barnet / Chipping Barnet
• Barnet Gate
• Barnet Vale
• Brent Cross
• Brunswick Park
• Childs Hill
• Colindale
• East Barnet
• East Finchley
• Edgware
• Edgwarebury
• Finchley
• Finchley Central
• Finchley Church End
• Friern Barnet
• Golders Green
• Grahame Park
• Hampstead Garden Suburb
• Hendon
• Hendon Central
• High Barnet
• Mill Hill
• Mill Hill Broadway
• Mill Hill East
• Monken Hadley
• New Barnet
• North Finchley
• Oakleigh Park
• Osidge
• Temple Fortune
• The Hyde
• Totteridge
• Underhill
• West Finchley
• West Hendon
• Whetstone
• Woodside Park

Related services

Other verified plumbing services in Barnet:

• Burst Pipes in Barnet
• Leak Detection in Barnet
• Blocked Drains in Barnet
• Toilet Repairs in Barnet
• Tap Repair & Installation in Barnet
• General Plumbing in Barnet
• Bathroom Plumbing in Barnet
• Kitchen Plumbing in Barnet
• Washing Machine & Dishwasher Installation in Barnet
• Boiler Repair in Barnet
• Boiler Installation in Barnet
• Boiler Servicing in Barnet
• Central Heating Repair in Barnet
• Commercial Plumbing in Barnet

Related guides

• How to Find Your Stop Tap (London Homes)
• London Hard Water — The Complete Homeowner & Landlord Guide 2026
• London Plumbing Costs & Compliance Guide 2026
• Victorian Terrace Plumbing Guide — London 2026

In an emergency, the fastest fix starts with the right first move: make the situation safe, then call the number that actually holds the duty — National Gas for a gas smell, your water company for no water or a street burst, Thames Water for a public sewer, Barnet Homes if you rent from the council, and a verified local plumber when the problem is inside your boundary. Every plumber listed here is checked before listing and kept under review afterwards, so when it is your call to make, you’re not gambling on a stranger.

Contact verified emergency plumbers in Barnet ↑

← Back to all plumbing services in Barnet

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 the bodies cited on it — National Gas, the Health and Safety Executive, Gas Safe Register, Barnet Council, the Drinking Water Inspectorate, Affinity Water, Barnet Homes, WaterSafe and Transport for London. Source links are provided within this page where relevant.

Sources & further reading

1. National Gas — Emergency contacts (gas emergency 0800 111 999; what to do if you smell gas; CO advice and HSE Gas Safety Advice Line 0800 300 363).
2. HSE — Gas safety (home owners) (carbon monoxide symptoms; CO alarm to BS EN 50291 with Kitemark, installed per manufacturer’s instructions).
3. Gas Safe Register (only a Gas Safe registered engineer may fit, fix or service gas appliances; ask to see the ID card).
4. Barnet Council — Flood and water management (public sewers Thames Water 0800 316 9800; road gullies / out-of-hours 020 8359 2000; clean-water supplier by area).
5. Drinking Water Inspectorate — Affinity Water area of supply (Barnet listed within Affinity’s supply area; clean-water supplier varies by postcode).
6. Affinity Water (one of Barnet’s clean-water suppliers; 24-hour emergency line 0345 357 2407).
7. Barnet Homes — Report a repair (council-housing repairs; 24-hour emergency 020 8080 6587).
8. Barnet Council — Critical Drainage Area projects (Friern Barnet and other surface-water flood areas).
9. Transport for London — Ultra Low Emission Zone (London-wide, all boroughs, from 29 August 2023).
10. WaterSafe (water-industry-backed national register of approved plumbers).
11. Drinking Water Inspectorate — Thames Water Utilities Ltd (area of supply) (Barnet listed within Thames Water’s clean-water supply area).