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  4. Extensions Conversions in London

Extensions Conversions in London

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

Local Extensions Conversions

We have found a selection of the best, most reliable Extensions Conversions 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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  • 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 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...

    90 reviews / 4.88 out of 5

    Powerpillar Ltd did an excellent job repairing our external wall. The team was professional, efficient, and the finish is top quality. Everything...

    London
    E10 7QP

  • 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...

    23 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 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 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
    N20 0HD

  • 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 Finchley 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...

    17 reviews / 4.99 out of 5

    Sebastian and the team promised on the first day to give me a beautiful bathroom. They kept that promise! We are delighted with the work. Would...

    London
    N3 1JG

  • 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 West London

    Kaca construction Ltd is a prospective, family run building company based in West London. We provide high quality services in residential...

    11 reviews / 4.98 out of 5

    We recently had our back building converted into a gym by KACA Construction Ltd, and we couldn’t be happier with the results. From the very...

    London
    W5 5QX

  • 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 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...

    184 reviews / 4.97 out of 5

    The proprietor and his staff communicated and provided detailed explanations. Excellent work in the bathroom and kitchen. Throughout, they...

    London
    SW3 5EX
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Other services relating to Extensions Conversions in London

Our average rating for Extensions Conversions

4.89 - 4.89 out of 5 from 2485 reviews

  • LD&C, Sidcup

    5 out of 5.0

    "LD&C delivered a professional and reliable service. Communication was clear, timelines were met, and the quality of work..."

    John Arnold on 28th April 2026

  • LINX Design And Build, London

    5 out of 5.0

    "The proprietor and his staff communicated and provided detailed explanations. Excellent work in the bathroom and kitchen...."

    Alex Walsh on 28th April 2026

  • Nouvell Decor, Buckhurst Hill

    5 out of 5.0

    "Thank you to mark and his team! They are very reliable, professional and mark is super knowledgeable."

    Paris Hamberg on 28th April 2026

  • Arden Projects Group Limited, Godalming

    5 out of 5.0

    "Arden Projects Group Limited delivered outstanding carpentry work on our loft conversion. The team was quick, clean, and..."

    Joe Woolley on 24th April 2026

  • Arden Projects Group Limited, Godalming

    5 out of 5.0

    "Used Arden for a loft extension and also reused these guys for a ground floor extension as loved their work. Hard to..."

    Harry Morris on 24th April 2026

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