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  1. Post a job

    Post a job

    Tell us about your job, and we'll alert suitable extension builders in London. It’s simple and free.

  2. Hire a tradesperson

    Tradespeople respond

    Once your job is posted, you'll get responses from interested extension builders through the website.

  3. Leave feedback

    Review and choose

    Browse profiles, work history, and feedback, then choose who you wish to share your details with.

  • Extension Kings Ltd

    Extension Builder working in London
    Trade Member since 2017

    I've been working in building trade for over 20 years , I can undertake any job small and big from foundations to the roof and anything between. I can provide any references and I have insurance of £5 million. Me and my team take pride at what we do and we do it first read more

    Latest Conversions - General feedback review:

    Brick wall alterations - work needed to start ASAP

    Highly recommend! Really pleased with the work. Alban was always responsive, helpful and kept his promises. Will definitely use again.

    By bella_clo on

  • PAL LEE GROUP LTD

    Extension Builder working in London
    Trade Member since 2018

    PAL LEE GROUP LTD is a London based construction company carrying out its services over the capital. We are a skilful team of builders with a number of successfully completed projects in property extensions and full house refurbishments. Our company provides complete project read more

    Latest Extensions feedback review:

    Kitchen extension and fit out

    Pal Lee carried out a kitchen side and rear extension in our flat. They have been very professional throughout the project, careful to detail and easy to communicate with. The result is outstanding. We are so pleased with the work carried...

    By matilde on

  • Bluelime Design and Build

    Extension Builder working in London
    Trade Member since 2012

    Bluelime is a one stop shop for all your planning, interior design , structural engineering and construction needs. With over 8 years worth of happy customers we pride ourselves with our honest and inventive solutions. Free initial consultations and proven track record of read more

    Latest Architecture feedback review:

    Loft conversion

    Thanks for the help mate

    By siotos on

  • My Trusted Builder Ltd

    Extension Builder working in London
    Trade Member since 2013

    When choosing My Trusted Builder know that our key focus is on customer satisfaction. We are here to add value to your project with our team of expert surveying and contracts managers. As a member of The Federation of Master Builders we are recognised for the quality of our read more

    Latest Extensions feedback review:

    Loft/first floor conversion, ground floor extension

    A massive and expensive disappointment. Alex made a big play about the quality of his work when selling his services to me. “Expensive but worth it!” said the banner put up outside my house. It was certainly expensive, however a...

    By ngates on

  • Glorum

    Extension Builder working in London
    Trade Member since 2017

    GLORUM Limited is a London-based construction company with 10+ years of building experience in domestic and commercial projects. GLORUM Ltd is your one-stop construction company made up of highly qualified and skilled tradespeople, designers and engineers that can read more

    Latest Extensions feedback review:

    Full refurb and single storey side return & wrap around

    Very impressed with Glorum from start to finish. This was one of our first projects so we spent a lot of time researching who we could use and all I can say is we made the right choice. Product was improved enormously from the initial plans...

    By williamcjrogers on

  • SIA Design Build

    Extension Builder working in London
    Trade Member since 2017

    We are a design build firm with over 14 years experience in the construction and architecture sector. We both have masters in architecture and are capable of assisting with all aspects of services. We have worked on over 40 residential projects in London since opening and read more

    Latest Extensions feedback review:

    Terraced House Refurb

    Antonio came on site and helped generate a quote for a property that we were looking to purchase. He was very responsive, attentive and a joy to work with during the 2 weeks we dealt with him. We can’t comment on the carried out works as...

    By emilypun on

  • REA Construction LTD

    Extension Builder working in London
    Trade Member since 2013

    The company’s success is built on the strong belief of quality work, attention to detail and on-time completion. Rea Construction Ltd has an in house team of builders, architects, and interior designers with all the relevant skills and qualifications which enable us to read more

    Latest Extensions feedback review:

    6m x 4.5m Rear extension

    REA Construction were exceptional from start to finish. They met budget and quality requirements without a problem and delivered 4 weeks earlier than quoted. I would strongly recommend REA construction to anyone who is looking for a...

    By sam_249q on

  • Musawir Architecture Limited

    Extension Builder working in London
    Trade Member since 2020

    We are fully qualified & established architectural design team, with high success rates in obtaining residential and commercial planning approval. A multi-disciplinary consultancy with 10 years combined experience. We provide services for all projects, new builds, read more

    Latest CAD/Drawings feedback review:

    Architect Needed for Floorplan remodelling

    Great job by Abul. Always responsive and willing to make the necessary changes to the floorplan that we had discussed. He's a versatile person as well and was happy to provide feedback on his thoughts about the project I was looking to...

    By guydemi on

  • Signature 1 Construction Ltd

    Extension Builder working in London
    Trade Member since 2019

    Signature 1 Construction LTD is a family run business with over 20 years experience in the building industry. We specialise in extensions, loft conversions and full house refurbs. Every job we undertake we take great care of the clients house and are experienced project read more

    Latest Extensions feedback review:

    House to flat conversion including rear extension

    Fantastic outfit. Spoke with previous clients who confirmed the same. Will be using again.

    By christian198 on

  • Pacho Build ltd

    Extension Builder working in London
    Trade Member since 2018

    At PACHO Build, we have years of experience in the building and joinery industry. We have tackled projects large and small and are always eager to show our creative abilities to new clients. Through experience we understand communication is the key factor to a successful read more

    Latest Extensions client reference:

    Pacho Build have completed a rear extension on my home, with a beautiful finish and on schedule completion-July 2017. Johnathan and his team are very professional, reliable and informative. I was told of the plans, and progress throughout...

    Reference taken by MyBuilder on

  • Has Constructions Ltd

    Extension Builder working in London
    Trade Member since 2020

    Has Constructions LTD, We are a building company with more than 30 years of experience in all chosen aspects of the construction industry. We specialise in works such as: -New builds -Extensions -Loft conversions -Full refurbishments -Electrics/ Plumbing We aim read more

    Latest Extensions feedback review:

    Front porch

    What can I say...it was a pleasure doing business with Muhamet and son. I'm soooo happy!. There was a continuous level of professionalism from start to finish. I hired them as my husband said they came with a positive attitude and wasn't...

    By gordon_684 on

  • Samul Construction LTD

    Extension Builder working in London
    Trade Member since 2008

    Estimate Prices From: * Loft Conversion £50k(labour+materials+scaffolding) * Home Extensions £3-4k per square metre * Basement £3-8k per square meter (labour+materials). * Bathroom refurbishment £8k (labour). read more

    Latest Conversions - General feedback review:

    Removal of interior dividing wall

    The wall was removed quickly and efficiently by Janusz and Janusz. There was little damage to surrounding areas as we'd discussed before the job began. The room (as well as the communal corridor in the apartment building) was well cleaned...

    By eastlondonsimon on

  • Azure Design Ltd

    Extension Builder working in London
    Trade Member since 2019

    Hi there! My name is Gaz and I am a builder who has been in the building trade for well over 10 years. I have completed numerous jobs all over London and greater London, my specialities include; loft conversions, extensions as well as general refurbishments. My previous read more

    Latest Extensions feedback review:

    W12 15M2 Side & Rear extension to terraced flat

    This project ended with contract termination & Court case to recover costs fixing Gaz’s building failures. Gaz (Gazmend) Gashi of Azure Design Ltd has been blacklisted by Assent Building Control due to these failures. Initially things...

    By noa on

  • GS GEO LIMITED

    Extension Builder working in London
    Trade Member since 2016

    Extention ,loft, House refurbishment, Bathroom refurbishment, decorating, wallpapering, fix coving, Tiling and laminate, service. available 7 days a week . read more

    Latest Extensions feedback review:

    Kitchen extension with island, utility room and toilet

    We completed our kitchen extension and garden room in December 2021 with Giorgi and his workmen. His workmen were very friendly, helpful, hardworking, punctual and nothing was too much to ask of them. Overall the work was good.

    By tdd2801 on

  • FNA Engineering Ltd

    Extension Builder working in London
    Trade Member since 2019

    FNA Engineering is a private limited company that was established in 2017, we are based in Acton, London. The team has over 11 years of experience in the field of construction, particularly the residential field. Area of residential experience would be house extensions, read more

    Latest Extensions feedback review:

    Back extension enlargement

    Difficult to start because of the Covid pandemic lock down but they stepped up quickly once we came out of lock down. Work went quickly and well as they kept everything as tidy as possible considering the building was partly occupied by...

    By bartley43 on

  • Craft of London

    Extension Builder working in London
    Trade Member since 2012

    Craft of London are an established building company, specialising in design and build projects, creating bespoke interiors and homes. Our workmanship is of the best standard in London for either small, medium or grand designs. read more

    Latest Restoration & Refurbishment feedback review:

    install fire doors

    fire doors installed by one of Kel's carpenters (Andrew Robinson). Andrew cut the doors to fit, put seals around, and installed self-closing mechanism. Shame that the self closing mechanism chosen do not pull enough the doors to properly...

    By luca_73 on

  • Good Choice Builders LTD

    Extension Builder working in London
    Trade Member since 2018

    We are the building company that specialized in Loft Conversions, Extensions and Refurbishments. By this moment we worked as a subcontractors, now we have all neccessary and feel free to participate to the tenders, prepare the informative and detailed contracts and read more

    Latest Extensions feedback review:

    3 x 3M extension

    A very efficient builder who did the plans which where passed first time when we needed help he found someone to help very clean and tidy and on time

    By karen98090 on

  • PML Architecture Ltd

    Extension Builder working in London
    Trade Member since 2014

    We are RIBA registered architects with a wide range of experience of over 25 years within architecture, design and construction. We are experienced at new builds, full refurbishments, extensions and conversions, and have completed numerous residential and commercial projects read more

    Latest Architecture feedback review:

    Planning application for new dwelling

    Phil is currently helping us with the planning application process to build a new property. This includes liaising with the council and other consultants on our behalf. Phil really knows his stuff, is easy to work with, and deals with...

    By sammy_75 on

  • MYCO Contractors Limited

    Extension Builder working in London
    Trade Member since 2019

    I am an experienced and fully insured builder. On average I and my team build and renovate 5 extensions per year. Our current or old clients are always ready to share positive feedback about our work. We work off the ready plans which are usually prepared by the clients read more

    Latest Kitchen Fitting feedback review:

    Replace old kitchen and install quarts worktop

    Tony and his team did a fantastic job in my kitchen. Among other things I was really surprised with the speed at which kitchen and worktop have been installed. While all supplier’s would give me 2 weeks lead time for quarts worktop, Tony...

    By nicky_186 on

  • Pops Building Services Ltd

    Extension Builder working in London
    Trade Member since 2018

    I am a city and guilds advanced craft qualified carpenter/joiner With over 30 years experience in the construction industry. I was the director of a property development company. I’ve managed contracts for NHS trusts as well as private contractors. The types of work I read more

    Latest Extensions client reference:

    Peter was the on-site foreman on our complete house renovation, which took just over a year. This included an additional ensuite pod bedroom in the roof and a side-return and extension to the kitchen. Peter was totally reliable throughout...

    Reference taken by MyBuilder on

What can extension builders do?

MyBuilder is the simplest way to find a reviewed and vetted extension in your local area. We can connect you with local extension builders near you, so you can choose the ideal tradesperson for your project with confidence.

Whether your plans are big or small, we can help you find a skilled extension builder to support you with your job. Your contact details are only shared with tradespeople you want to speak to, so you can check out their credentials, read honest customer reviews and get free quotes to compare.

There are lots of jobs that extension builders can help with, including:

  • Extending your home with an extra room
  • Two+ storey extensions
  • Adding partition walls to create more rooms
  • Building annexes or external structures

Top Extension Builder Reviews

98%

Extension Builders working in London have an average review score of 98% positive based on 8,706 homeowner reviews.

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