Mark Lewis
Really great service, sorted our problem even late in the evening, many thanks.
Boiler repairs and servicing, new boilers, landlord gas safety certificates and everyday plumbing, from a Gas Safe registered engineer based in Streatham.

InstaGasWorks is an independent plumbing and heating business on Mitcham Lane in Streatham, covering South London from Battersea and Putney down to Croydon and Sutton. Boilers are repaired, serviced and installed, heating and plumbing put right, and landlord gas safety checks carried out by the engineer who answers the phone.
No heating, a service due to keep the warranty, or a new boiler on the cards: every price is published on this site and agreed before any work starts.
Gas Safe registered 916923Check InstaGasWorks on the registerEvery service has its own page with what the job involves, its prices and how to book. Servicing and breakdown visits can be booked online, and for emergencies the phone is answered 24/7.
New combi and system boilers, sized for your home and fitted by a Gas Safe registered engineer, with a free survey and a written quote first.
Learn moreA basic or full annual service that keeps your boiler safe, efficient and within its manufacturer warranty, with a digital service record.
Learn moreNo heating or hot water, low pressure, leaks or a fault code. The fault is found, explained plainly and quoted before any repair starts.
Learn moreClears the sludge that leaves radiators cold at the bottom, then protects the system with inhibitor so the boiler can run efficiently.
Learn moreThe yearly gas safety check for rented homes, with the Landlord Gas Safety Record emailed to you the same day.
Learn moreLeaks, taps, toilets, pipework and hot water cylinders, fixed properly by a local engineer who explains the job before starting.
Learn moreFull refits or single jobs: showers, basins, toilets and the plumbing behind them, surveyed and quoted in writing.
Learn moreSinks, taps, appliances and gas hobs connected safely, or a full kitchen fit with the plumbing and gas work done together.
Learn moreBurst pipes, leaks, gas escapes and no heating. The phone is answered 24/7, and urgent jobs aim for same-day attendance.
Learn moreNot sure which service you need? Call 0208 226 0205 and describe the problem, or read the advice guides.
Rated 5.0 from 22 Google reviews
Read the reviews





About InstaGasWorks
InstaGasWorks looks after homes across south west London, and most new work still comes from someone telling a neighbour.
Your Gas Safe registered engineer turns up when promised, explains what was found before touching anything, and quotes the job before starting it. Whether it's a full system upgrade or a boiler that died on the coldest night of the year, you get the same engineer and the same standard.
Read the storyInstaGasWorks covers a tight patch, from Battersea and Putney, down through Wimbledon and Streatham, to Croydon and Sutton. Staying local is what makes same-day breakdown visits possible. Pick a borough to see what's covered.
Wandsworth · Battersea · Putney · Balham · Tooting
Wimbledon · Colliers Wood · Mitcham · Morden
Not on the list? Call 0208 226 0205 and you'll hear straight away whether your address is within reach.
Real installs from real homes across London: boilers, bathrooms, cylinders and gas fires, all by a Gas Safe registered engineer.
Every review below is a real one from the InstaGasWorks Google listing. Read them there if you'd rather check for yourself.
Really great service, sorted our problem even late in the evening, many thanks.
Amazing service! Issue with my boiler was fixed within 24 hours despite needing a new part to be ordered
Called chris out for an emergency. He isolated and made safe the problem late Sunday evening. Three days later he’s fitted the new part. Professional and efficient service.
Fantastic company. I had an urgent problem with my boiler. Chris fitted me in quickly, came round, talked me through what was wrong, and fixed it there and then. Really good service and excellent value for money.
Couldn’t recommend him highly enough. Absolutely brilliant service from start to finish. He was friendly, professional, knowledgeable and went above and beyond to get everything sorted for me. He explained exactly what the issue was, kept me updated throughout and made sure everything was working properly and safely before leaving. Really reliable, easy to deal with and clearly takes a lot of pride in his work.
Chris was very kind and professional. He worked cleanly and left everything tidy afterwards. I really appreciated his friendly service and would happily recommend him!
Chris was great. I needed a gas stove top replaced and he helped confirm if the model I selected would fit the dimension via messages. Chris also gave me a time range for the work involved and clear communication of costs. On the day he arrived promptly, finished the work and did all the safety checks. I would recommend Chris.
Absolutely fantastic called Chris to decommission an old gas fire in a hurry and he came same day and did a great job, great price, great attitude 10/10
Chris was great for our boiler service. I reached out to him on Thursday afternoon and he came over the next day promptly at the agreed time. He was friendly and got the job done quickly, with reasonable and transparent pricing. I’d be happy to recommend him to anyone
Chris overcame several problems when dealing with the old gas pipes, removing two large radiators and capping off the connections to one radiator that was not being replaced. He also happily fitted in with my schedule for the complete renovation of my lounge, which meant making several visits. The new designer radiator weighed a hefty 51kgs but Chris was undaunted and managed to lift it onto the new brackets - with mainly verbal encouragement from me! All in all, a great job. Chris worked hard, dealt with the unexpected problems professionally, and I am very pleased with the result. I have no hesitation in recommending him.
Chris was amazing. He was responsive, helped problem solve over text, and fixed our hob issues in person very efficiently. 100% recommend.
Chris helped to install a gas hob and electric oven - worked very collaboratively as we swapped out for a freestanding oven. Would recommend and use again
Thank you so much for your services. I would highly recommend 👌. …
Prompt and effective repair on my boiler
Excellent service. Efficient and reliable. Chris has a great manner in the way of explaining what needs to done and how he will do it. No hesitation in recommending Instagasworks and I will contact again if needed in the future
Instagasworks plumbing and Heating. This is the most competent and efficient company with regard to the installation and maintenance of heating systems that I have ever come across. They have just installed a new boiler in my kitchen. This company has earned the four star rating that I have awarded.
Amazing service, friendly and very hardworking
Chris is kind and helpful. He is quick to respond and goes above and beyond to help.
Amazing customer service, chris goes over and beyond!
I can’t recommend Chris at Instagasworks highly enough. Over the course of a week he resolved a high pressure issue on my boiler which had been ongoing for over a month. He explained everything really clearly and dealt with the issue with integrity, which involved replacing a heat exchange plate. I never got the impression he was trying to rip me off and his prices are fair and competitive. My boiler is located in an awkward location but he worked with me to ensure he could complete the work, and I’ll definitely be using his services in the future.
Great service from start to finish. Arrived on time, explained everything clearly, and got the job done quickly and neatly. Would definitely recommend!
Qualifications & boiler brands
InstaGasWorks Plumbing & Heating works on a wide range of boiler makes and models, providing professional servicing, repairs, fault diagnostics and installations.
The things people ask most, including what to do right now if you smell gas or a pipe has burst.
Book a Gas Safe registered engineer for boilers, heating and plumbing across South London, with the price agreed before any work starts.
Rated 5.0 on Google
Phone answered 24/7. Same-day visits when the diary allows.
Public liability
£2 million insured
Plumbing qualifications
City & Guilds and NVQ