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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.

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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 St. Albans. 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 St. Albans, (Herts),...

    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...

    St. Albans
    Hertfordshire
    AL2 1DP

  • 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...

    118 reviews / 4.92 out of 5

    This is the second project we have completed with Beswick Building Ltd at our home, and will not be the last! Matt, Steve and the team are...

    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...

    77 reviews / 4.86 out of 5

    I got a couple of quotes but went with Lucasz because he sounded experienced. I thought my job was complicated as it needed a number of trades:...

    Borehamwood
    Herts
    WD6 2JD

  • 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...

    12 reviews / 4.96 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 St. Albans. Covering St. Albans and surrounding areas

    Oliver Building Services Ltd provides house extensions and bungalow extensions in St Albans, helping homeowners in and around the local area make...

    36 reviews / 4.97 out of 5

    We are delighted with our new kitchen. Oliver and his team are true professionals and did a brilliant job of fitting it. They were friendly,...

    St. Albans
    Hertfordshire
    AL1 5GW

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    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 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

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

    Chelebi Builders is a Build & Design construction company based in North London. Our expertise range from Loft Conversions, Extensions, House...

    31 reviews / 4.96 out of 5

    Chelebi carried out a side and rear extension on our Victorian semi detached. Cafer and his team pulled out all stops to ensure works were...

    London
    Greater London
    N12 0DR

  • Extension Specialists in Finchley. Covering London, Home Counties and all surrounding areas

    In an unstable market, house extensions are often the most viable option, allowing you to maximise the use of your existing space without...

    38 reviews / 4.91 out of 5

    Allan and his team are excellent. Very respectful, punctual and professional. Cannot be happier with the service they provided.

    Finchley
    London
    N3 2AG

  • 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
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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 2533 reviews

  • Westbury Builders, Gravesend

    5 out of 5.0

    "New kitchen - Excellent work, professional & trustworthy"

    Maria Wheeler on 14th October 2026

  • Level Up London Ltd, Romford

    5 out of 5.0

    "A brilliant team. Andrew is excellent with communication and his commitment to doing a good job is so evident. The team..."

    Lucy Hobbs on 11th October 2026

  • Level Up London Ltd, Romford

    5 out of 5.0

    "Absolutely superb! I could not recommend Andrew and his team more highly. I am had a complex job involving a window..."

    Lucy Hobbs on 11th October 2026

  • R&J Building Services Ltd, Shefford

    5 out of 5.0

    "Absolutely brilliant. I asked Jon at R&J to quote for removing my old conservatory and replace with a wooden open topped..."

    Henry Titley on 11th October 2026

  • Nevill Construction Ltd, Bishop's Stortford

    5 out of 5.0

    "Dan and Danny are absolutely amazing! They did a fantastic job on our loft conversion, and we couldn’t be happier with..."

    Derek Tills on 10th October 2026

Other locations for trusted Extension Builders

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