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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.

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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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  • 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 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

  • 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...

    8 reviews / 4.98 out of 5

    We’re absolutely delighted with our renovation. Chris and his team did a really great job, we feel like we’re living in a new house! We booked...

    London
    NW3 4DB

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

    TrustATrader Guarantee for extra peace of mind. 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 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...

    193 reviews / 4.97 out of 5

    Fantastic experience with Linx Design And Build! The team handled every stage of the project, from design and planning to construction, with great...

    London
    SW3 5EX

  • Extension Specialists in London.

    Level Up London Ltd provides home extension specialists across London, helping homeowners create more space without the stress of moving. With...

    9 reviews / 5.0 out of 5

    Works completed Full Refurb 3 bedroom house Kitchen, 2 bathrooms, decorating, garden Level Up London completed my project last year to...

    London
    E4 9BX

  • Extension Specialists in London. Covering Greater London

    Den Builders LtdInnovative. Reliable. Family-Run Construction Experts.Based in Greater London, Den Builders Ltd is a trusted, family-run...

    9 reviews / 5.0 out of 5

    We had a great experience with Denbuilders! Den built our home extension and managed the entire project from start to finish. He was professional,...

    London
    SE9 1PF

  • 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 London

    Bubble Level Ltd provides home extensions and extension planning for homeowners across London and the surrounding area. In an unstable market,...

    27 reviews / 4.96 out of 5

    Would recommend them and very customer service provided. Good quality workmanship and knowledgeable about the service they provide.

    London
    N18 1HP
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Other services relating to Extension Builders in London

Our average rating for Extension Builders

4.99 - 4.99 out of 5 from 2473 reviews

  • Nova Design & Build London Ltd, London

    5 out of 5.0

    "Excellent experience from beginning to end. The team were friendly, reliable and incredibly hardworking. They respected..."

    Michael Rosse on 18th August 2026

  • R&J Building Services Ltd, Shefford

    5 out of 5.0

    "Jon was completing a similar extension at a neighbouring house and was happy to have an early discussion, giving us great..."

    Anne Taylor on 17th August 2026

  • R&J Building Services Ltd, Shefford

    5 out of 5.0

    "Jon & the team did an excellent job from start to finish on our extension. They have all of the qualities everyone wants..."

    Greg Hall on 16th August 2026

  • Level Up London Ltd, Romford

    5 out of 5.0

    "We absolutely love our new shower room. Andrew and Peter worked so hard every day, and their work was first class!! They..."

    Laura Fackerell on 13th August 2026

  • Lukpol Building Services Ltd, Borehamwood

    5 out of 5.0

    "This is the third time I have used Lukpol Building Services and the work each time has been excellent. These works..."

    Alan Giesenow on 13th August 2026

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