Plumbing, heating, drainage and electrical work across London
Every job on this page is carried out by engineers of our own, for householders and commercial clients alike. Missing the job you need? Give us a ring. Asking takes less time than guessing from a list.
- Fully insured and Gas Safe registered
- Engineers DBS-checked
- 24/7 emergency callouts
- Price agreed before we start
- Workmanship guaranteed
Monday – Sunday, 7:00 AM – 10:00 PM · Out-of-hours emergency? Call 020 3576 5825
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Expect a call back on the number you entered. For anything urgent, there is no need to wait: ring 020 3576 5825.
Pick your job
Each page sets out what the job includes, the things worth checking before you ring us, and the questions we hear most often.
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Emergency Plumbing
For burst pipes, serious leaks or a house with no water. The phone is answered at any hour and an engineer is sent out.
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Boiler Repair
Heating off, hot water gone or a fault code on the display. We find the cause, then fix it.
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Boiler Service
A yearly check to keep your boiler safe, running efficiently and covered by its warranty.
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Boiler Installation
Your new boiler, matched to the size of the home, installed well, at a price agreed up front.
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Boiler Replacement
A new boiler when the old one is finished, and an honest view on whether it really is.
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Drain Unblocking
Blocked sinks, toilets and outside drains cleared with the right kit instead of bottled chemicals.
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Leak Detection
Acoustic and thermal equipment to trace hidden leaks before any floor is lifted.
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Bathroom Installation
Anything from swapping one fitting to stripping out and refitting the whole room, priced before work starts.
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Toilet Installation
Fitting a new toilet, replacing an old one, or putting a WC somewhere it has never been.
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General Plumbing
Radiators, pipework, taps and toilets: the small jobs that keep getting put off.
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Commercial Plumbing
Plumbing for offices, restaurants, shops and blocks of flats, timed to fit the hours you open.
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Gas Safety Certificates
Your landlord gas safety certificate, checked and issued by a Gas Safe registered engineer and emailed over the same day.
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CCTV Drain Surveys
We send a camera into the drain to see the real fault, instead of guessing from the symptoms you notice at the surface.
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Drain Repairs
For drains that are broken, not merely blocked. We repair them by excavation or, if the run allows, with no digging at all.
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Wet Rooms & Walk-In Showers
Full wet rooms and level-access showers. The tanking and falls underneath decide if it will leak within five years or never leak at all.
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Air Conditioning Repair
Stopped cooling, leaking indoors or tripping the breaker? We track down the fault before quoting for anything.
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Air Conditioning Maintenance
A yearly visit to keep your system cooling efficiently and to catch a refrigerant leak before it turns into a breakdown.
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Air Conditioning Installation
Single and multi-split air conditioning, correctly sized and positioned, and installed by F-Gas registered engineers.
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Air Conditioning Replacement
Worn-out or failing systems replaced, including older units whose refrigerant is no longer available for top-ups.
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Blocked Toilet
A toilet that will not flush away, or one that keeps blocking. Cleared, with the cause explained.
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Shower Installation
Mixer, thermostatic and digital showers fitted — matched to the water system you actually have.
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Shower Repair
Weak flow, wandering temperature, no hot water or a leak — diagnosed and repaired, usually without a new shower.
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Bath Installation
One bath out, another one in — or the bath out and a shower in its place.
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Tap Repair and Replacement
Dripping, stiff and leaking taps repaired, and tired ones swapped for new.
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Lead Pipe Replacement
Old lead supply pipes replaced with new, from the boundary into the house.
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Pipe Repair
Burst, split, frozen and corroded pipework repaired — or replaced where patching it would be pointless.
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Low Water Pressure
Weak taps and showers diagnosed by testing, not by swapping parts and hoping.
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Central Heating Installation
The whole system — boiler, pipework, radiators and controls — rather than a new boiler on its own.
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Surface Water Drainage
Rainwater with nowhere to go — standing water on patios, paths and gardens, given somewhere to drain.
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Gutter Repair
Blocked, leaking, sagging and overflowing gutters cleared and repaired, along with the downpipes below them.
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Leaking Ceiling
Water dripping or pouring through a ceiling. What to do first, then the source found and stopped — in your home or the flat above.
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Toilet Repair
Toilets that will not flush, keep running, fill slowly or leak onto the floor. Usually one worn part, replaced without needing a new toilet.
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Leak Repair
Leaks you can see — dripping joints, weeping valves, perished hoses, overflows running outside — isolated, repaired and checked properly afterwards.
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Electrical Repairs
Tripping circuits, dead sockets, faulty lighting and extractor fans, traced and fixed with the price agreed first.
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Emergency Electrician
Power loss, trips that will not reset, burning smells and water in the electrics. We take calls around the clock.
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EICR Certificates
Electrical Installation Condition Reports for landlords, homeowners and buyers, with any remedial work priced separately.
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Fuse Box Replacement
Old fuse boxes swapped for modern consumer units with RCD protection, tested, certified and notified for you.
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Rewiring
Full and partial rewires for houses and flats, planned around you and the other trades, then tested and certified.
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EV Charger Installation
Home charge points surveyed, fitted, notified and certified, with any supply upgrades priced up front.
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Commercial Washroom Refurbishment
Staff and customer toilets, washrooms and changing rooms stripped out and refitted, planned around your trading hours.
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TMV Servicing & Testing
Thermostatic mixing valves tested, cleaned and reset, with a record for every valve, for schools, nurseries, care and business premises.
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Homes and landlords
Homeowners, tenants and landlords all over the capital call us, whether for a pipe that bursts at eleven at night or a bathroom you’ve been meaning to redo for three years now.
- Repairs in an emergency, at any hour
- Boiler replacement and servicing
- En-suite and bathroom fitting
- Tenancy turnarounds and repairs for landlords
Businesses and managed blocks
We look after offices, restaurants, shops and blocks of flats, fitting the work around tenants and opening hours and reporting back to the person who signs the work off.
- Plumbing for washrooms and commercial kitchens
- Drain clearance and CCTV surveys for commercial sites
- Reactive repairs on behalf of managing agents
- Visits out of hours so trading is not disrupted
Boiler work, make by make
Each boiler job, from repair and servicing to installation and replacement, has a page of its own above. There is also a page for every brand, explaining the faults it tends to develop.
Damp and condensation
Damp is something we survey, diagnose and treat as well. Rising damp, penetrating damp and condensation each call for a different fix, so Ninja Plumbers begins with a proper inspection instead of a guess.
Advice on plumbing and heating
EICR for Landlords: What the Law Requires and What to Expect
Every private tenancy in England needs an EICR. Here is what the rules ask of you, what the codes mean, and what to do if the report fails.
Boiler Pressure Low? How to Top It Up and Why It Keeps Dropping
Topping up takes a few minutes. Working out why the pressure keeps falling is what stops it happening again.
Why Is My Water Bill So High? Hidden Leaks Explained
A leak you cannot see is still a leak you are paying for, and the water meter usually notices before you do.
Unsure what the job needs?
Explain what is happening and Ninja Plumbers will walk you through the work involved and the cost. For anything urgent, call instead of emailing. The booking line is answered by a real person who can get an engineer on the way.