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  4. Extension Builders in London

Extension Builders in London

Browse trusted local Extension Builders in London on TrustATrader, all vetted, with photos of completed work, and reviews from previous customers.

Local Extension Builders

We have found a selection of the best, most reliable Extension Builders in your area. You can click on a trader profile to find out more information, send email/SMS enquiry, or add them to your call back list.

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We see you’re looking for Extension Specialists in London. Tell us about your job, and we'll send your request to multiple trusted traders in your area. Get responses and choose the right trader for you, with no obligation.

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  • Don't forget! Please mention TrustATrader when you contact any of our trusted traders.

    TrustATrader Guarantee easily covers your next job via TrustATrader to provide extra peace of mind. Click this icon within the listing to register your TrustATrader Guarantee. Find out more

  • Extension Specialists in London. Covering the whole of London and the surrounding areas

    Powerpillar Ltd is based in London and we have been providing high standard house and bungalow extensions for customers in London and the...

    91 reviews / 4.88 out of 5

    We are delighted with the office refurbishment completed by Powerpillar Ltd. Their team delivered a professional, high-quality service from start...

    London
    E10 7QP

  • Extension Specialists in London. Covering East and North London, North West London, Central London and all surrounding areas.

    In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the...

    60 reviews / 4.94 out of 5

    Bright Builders are an amazing team of friendly, responsible and professional builders. Ervin is a great person to work with; understanding,...

    London
    E17 7LP

  • Extension Specialists in London. Covering SW1, SW6, SE13, SW19, KT1, TW1 and all surrounding areas

    AL-KO Construction Ltd is a London-based home extension specialist with more than 12 years' experience delivering high-quality house and bungalow...

    34 reviews / 4.98 out of 5

    Altin's plastering work is second to none! The walls are smooth and flawless, making the room look brand new. Their attention to detail and...

    London
    SE11 4AE

  • Extension Specialists in London. Covering all surrounding areas

    In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the...

    14 reviews / 4.96 out of 5

    Pure Contractors exceeded all our expectations on every level. From the initial consultation right through to the end result. Everyone we dealt...

    London
    SW11 1AA

  • Extension Specialists in London. Covering Greater London

    In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the...

    67 reviews / 4.99 out of 5

    Adam and his team did an excellent job refurbishinb the floors of a bathroom and kitchen that had ceramic tiles fitted on the wrong subfloor...

    London
    EC2A 4NJ

  • Don't forget! Please mention TrustATrader when you contact any of our trusted traders.

    TrustATrader Guarantee easily covers your next job via TrustATrader to provide extra peace of mind. Click this icon within the listing to register your TrustATrader Guarantee. Find out more

  • Extension Specialists in London. Covering Throughout London

    About Us21st Century Design & Build Ltd is a London-based design and build specialist offering high-quality house and bungalow extensions across...

    24 reviews / 4.96 out of 5

    This is the second time using the 21st century and design and build team and couldn’t be happier! This project was twice the size of the last one...

    London
    SE4 1JD

  • Extension Specialists in London. Covering London, North London, Hertfordshire

    In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the...

    6 reviews / 5.0 out of 5

    Full house refurbishment Chris and his team's results have been amazing! The project entailed a complete refurbishment of my four bedroom...

    London
    NW3 4DB

  • Extension Specialists in London. Covering Chelsea, Kensington, Mayfair & Soho

    LINX Design And Build is a family-run business with intensive experience in the building and construction industry. We have been helping customers...

    189 reviews / 4.97 out of 5

    Excellent kitchen fitting service from start to finish. The team was professional, punctual, and paid great attention to detail. Superb...

    London
    SW3 5EX

  • Extension Specialists in London. Covering all surrounding areas within a twenty mile radius

    Welcome to Prime Construction Services LtdWe are builders based in London that have been successfully completing work in the area for many...

    17 reviews / 4.93 out of 5

    One of the few contractors out there who were honest, patient with our indecisiveness and flexible in their approach with us. Prime Construction...

    London
    N12 9LY

  • Extension Specialists in London. Covering Herts, Middx, and all areas of North and North West London.

    RAS Construction & Design Ltd is a well established company specialising in all aspects of extensions, loft conversions, general building,...

    39 reviews / 4.95 out of 5

    RAS did a superb job for us. They carried out an extensive top-to-bottom refurbishment of our double-fronted Edwardian house. This included an...

    London
    Hertfordshire
    NW7 0AN
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Other services relating to Extension Builders in London

Our average rating for Extension Builders

5.0 - 5.0 out of 5 from 2289 reviews

  • LINX Design And Build, London

    5 out of 5.0

    "Excellent kitchen fitting service from start to finish. The team was professional, punctual, and paid great attention to..."

    Henry Holland on 22nd June 2026

  • C Shambi Builders Ltd, Barnet

    5 out of 5.0

    "Chris and his team refurbished a flat I purchased 4 years ago, and I could not have been happier with the experience. The..."

    Marie Proumen on 18th June 2026

  • Allround Building Services Limited, Slough

    5 out of 5.0

    "We can’t thank Asad and his team enough for the work that’s been carried out, the standard of craftsmanship is..."

    Lauren Clarke on 16th June 2026

  • Ashcourt LER LTD, Richmond

    5 out of 5.0

    "Great team, very professional. Easy to deal with and left my house very tidy Had my bathroom converted and replaced..."

    Perry Bispham on 16th June 2026

  • Evolution Building and Developments Ltd, Kings Langley

    5 out of 5.0

    "I found Evolution Building and Developments an exceptionally efficient and effective company with whom I’d certainly..."

    Mark Preece on 15th June 2026

Other locations for trusted Extension Builders

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