5 star boiler installation from London’s number 1 boiler replacement specialists

  • Price Match guarantee – if you can find a cheaper like for like quote we’ll match the price AND give you a £50 high street voucher
  • Flexible payment options – including Buy Now Pay Later and 0% finance from just £9 per month
  • Peace of mindUp to 12 year warranty on new boilers
  • Award winning customer service – our customer service team are trained to listen not to sell
  • 5 star customer satisfaction – we have a 5 star rating on Trust Pilot and Which Trusted Traders
  • Instant online quote – or we can send a surveyor to your home to provide a free, no obligation quote.
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quote today

I Need A New Boiler

Fix My Boiler

Get a Boiler as Easy as


Fill in our online quote calculator or call our friendly team for a quote.  Once an engineer has visited your property we offer a fixed price promise on your quote.

Don’t panic, we offer evening and weekend appointments so there’s no need to book any time off work!


Decide whether you want to spread the cost of your boiler in easy monthly payments with our 0% finance or pay in full upon satisfactory completion of the job.


Choose an installation date that suits you and sit back while our experienced engineer installs your brand new, energy saving boiler. Allow yourself to feel smug knowing our lovely engineer will leave your home as clean as a whistle, that you’re about to start saving money on your energy bills and that you’ll have no boiler worries for up to ten years with a parts and labour guarantee

Why LS1?

  • We offer affordable and honest pricing – put us to the test we’re sure you’ll be happy with our quote. We can also offer 0% finance starting at just £12 per month
  • We’re simply the best – well we like to think so but it’s also backed up by hundreds of positive reviews on independent review sites
  • We’re highly experienced – we are one of the 5% of gas installers who have been DIAMOND accredited by leading boiler manufacturer Worcester Bosch. This means we have been through a stringent vetting and training process and are authorised to offer longer guarantees on their boilers.
  • We’re better than the ‘big boy’s – we’re not a nameless corporate entity, we genuinely care about our customers and doing a great job for them.
  • We’re passionate about helping our local community whether it be sponsoring local charities like The Brixton Soup Kitchen or mentoring young people.
Get a
quote today

Allow us to introduce ourselves……….

We are LS1 Boiler Installation, a friendly, family-run and ethical boiler and central heating company based in South West London. We started life as Landlord Safety 1st back in 2005 with a focus on boiler servicing and landlord gas safety inspections, as our reputation grew we decided to meet the growing demand to provide full boiler and central heating installations.

In 2007 we relaunched as LS1 Boiler Installation, we are now one of London’s largest boiler and central heating companies and it’s all thanks to our army of happy customers who continue to spread the word about what a great job we do.

When it comes to boiler installations, we really are the ‘A’ team because it’s what we do day in and day out. It also means we are bang-up-to-date on all the latest innovations and new technology like the fantastic Nest smart control that makes managing your heating and hot water a doddle

What Our Customers Say

Customer reviews and testimonials
Miss Palmer, CheckatradeCustomer in London, 20th April 2017

“Great service from start to finish. Lee was friendly and punctual, and completed the work to a high standard. Would highly recommend.”

Mr Sobrino, CheckatradeCustomer in London, 1st March 2017

“Excellent customer service, convenient, cordial, on time and price, and most of all, reassuring which is always great with gas appliances.”

Mrs Lucy Galp, CheckatradeCustomer in Surbiton, 4th February 2017

“Fantastic job from LS1 Boiler Installation! From the start to finish everything was done very professional. Engineers are very knowledgeable, punctual, very polite.”

Mrs Joanne Seddon, CheckatradeCustomer in London, 23 Dec 2016

“Fantastic service from LS1 Boiler Installation and their engineer Lee. Lee did a really good job and left everything as he found it. Thank you!”

Gregory Sledzinski, Which Trusted TradersCustomer in London, 4 Jul 2017

“Having had LS1 recommended to me from a personal friend gave them a call. Customer Service was excellent. Tracy booked me in asap for a much needed new boiler installation. I spoke to the engineer on the day of installation by phone and he was very informative on what he was doing. Returned home and happy to see a very tidy job with working new boiler. Even connected my current new wireless thermostat I just bought to the new boiler. Tracy sorted out my very long new warranty and sent it out in the post. All in all a very smooth and pleasant service. I'll be recommending LS1 to everyone I know and will continue to use them in future for my annual service.”

Tan Huynh, Which Trusted TradersCustomer in London, 26 Jun 2017

“I had a new boiler installed by LS1 boiler installation when I had refurbishment done to my flat. They were very helpful from the initial phone call to the person who came around to do the survey. They provided me with a very competitive price with great warranty compared to other boiler installations in South London. The plumber who came around to install the boiler did a great job, even my builders commented on how good his workmanship was. I would recommend speaking to the LS1 boilers and save yourself time and money.”

Charlie Beaton, Which Trusted TradersCustomer in London, 21 Jun 2017

“I don't live locally to where my rental properties are and I have to say I don't know what I would do without LS1 as a contact when I need help. They are always at the end of the phone straight away and organise someone the same day or the next at the latest, they really put my mind at ease knowing I can call upon them whenever I need them, I highly recommend their services.”

D Rosier, Which Trusted TradersCustomer in London, 18 May 2017

“They spent days trying to source a part for my aging boiler that my builder had broken, rather than have to replace the boiler. Tracey and Jordan were awesome: all fixed!”



Customer Satisfaction Rate


Boilers Installed


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Accredited Worcester Boiler Installers
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London’s Number 1 Boiler Installers
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