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  4. Extension Builders in Watford

Extension Builders in Watford

Browse trusted local Extension Builders in Watford 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 Watford. 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 Kings Langley. Covering Hertfordshire, Bedfordshire and Buckinghamshire

    Evolution Building and Developments Ltd provides house and bungalow extensions across Kings Langley and the surrounding area, helping homeowners...

    10 reviews / 4.92 out of 5

    We were very happy with the work that Evolution recently carried out at our house removing a chimney breast over 2 floors and installing...

    Kings Langley
    Hertfordshire
    WD4 8HZ

  • Extension Specialists in Harrow. Covering Harrow and incorporating a 15 mile radius

    About BLS Builders, Harrow.🚫 NO MARKETING CALLS PLEASE.BLS Builders is a family-run business with over 25 years of experience, proudly based in...

    14 reviews / 5.0 out of 5

    Great team - very professional and easy to work with. We will use them again and have recommended to others.

    Harrow
    HA5 1EU

  • Extension Specialists in Radlett. Covering all areas of Herts and London.

    ADS Contracts is a well established, trustworthy, reliable and professional company with over 30 year's experience. Based in Radlett, (Herts), we...

    30 reviews / 4.54 out of 5

    Very experienced team of professionals. Dave and his team have done various jobs for me over the last few years and they have all been completed...

    Radlett
    WD7 9FH

  • Extension Specialists in St Albans. 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...

    117 reviews / 4.92 out of 5

    Having now used Beswick Building for two projects (inevitable when dealing with a Victorian property), I have found the team are always polite and...

    St Albans
    Hertfordshire
    AL1 1SF

  • Extension Specialists in Borehamwood. Covering London and Hertfordshire 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...

    75 reviews / 4.86 out of 5

    Łukasz did an excellent job. The load-bearing wall demolition was carried out efficiently, professionally, and exactly as agreed. You can clearly...

    Borehamwood
    Herts
    WD6 2JD

  • 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 Uxbridge. Covering Uxbridge, Ruislip, Ickenham, Rickmansworth, Denham, Hillingdon and Harefield

    Our building services company JPH Property Developments was established over 20 years ago, and I have 40 years experience in the building...

    11 reviews / 4.95 out of 5

    Jason was very polite and courteous. He listened to our needs and once we all agreed on the work he just cracked on with no fuss. He was...

    Uxbridge
    Buckinghamshire
    UB9 5DJ

  • 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 St. Albans. Covering Hertfordshire, Bedfordshire, Greater London, 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...

    20 reviews / 4.83 out of 5

    Vito and Dan did a great job on our garage conversion (along with all sub-contractors). We are very happy with the final result. Competitive...

    St. Albans
    Hertfordshire
    AL3 6HR

  • 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 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
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Other services relating to Extension Builders in Watford

Our average rating for Extension Builders

5.0 - 5.0 out of 5 from 2274 reviews

  • Lukpol Building Services Ltd, Borehamwood

    5 out of 5.0

    "Łukasz did an excellent job. The load-bearing wall demolition was carried out efficiently, professionally, and exactly as..."

    Mariusz Aleksander on 15th May 2026

  • LINX Design And Build, London

    5 out of 5.0

    "Linx Team recently transformed our garage, and we couldn't be happier with the outcome. The team finished the assignment..."

    James Ferguson on 10th May 2026

  • Beswick Building & Renovations Ltd, St Albans

    5 out of 5.0

    "Having now used Beswick Building for two projects (inevitable when dealing with a Victorian property), I have found the..."

    Edward Schroeder on 8th May 2026

  • UCS Damp Proofing, Highgate

    5 out of 5.0

    "Richard came to view the proposed work, provided really useful advice that helped with my decision-making and made me..."

    Sarah C on 1st May 2026

  • 21st Century Design & Build Ltd, London

    5 out of 5.0

    "We have had a great experience with Thomas and his team. Thomas really helped us with a complete kitchen renovation. He..."

    Clody Wright on 30th April 2026

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