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  4. Extension Builders in Welwyn Garden City

Extension Builders in Welwyn Garden City

Browse trusted local Extension Builders in Welwyn Garden City 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 Welwyn Garden City. 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 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 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...

    116 reviews / 4.92 out of 5

    "Matt Beswick and his team did a complete kitchen renovation for us. They fitted a new kitchen from ceiling to floor which basically involved...

    St Albans
    Hertfordshire
    AL1 1SF

  • Extension Specialists in Waltham Cross. Covering Herts, Essex and North London.

    GP Property Services has over 25 years experience in offering a wide range of building services from extensions, renovations and loft conversions...

    31 reviews / 4.99 out of 5

    Gary and Paul have just completed a downstairs rear extension, side upstairs extension and full redecoration including new windows throughout on...

    Waltham Cross
    Herts
    EN7 6DR

  • 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 Ware. Covering Herts . London . Essex . Cambs . Beds .

    About UsReid James is a family-run building and construction company based in Ware, Hertfordshire, serving London, Essex, Cambridge and...

    107 reviews / 4.82 out of 5

    A lovely job carried out by Stuart and his team. Complete refurbishment of our shower room/cloakroom. Work completed to a high standard by all...

    Ware
    Herts
    SG11 1BQ

  • 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 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...

    74 reviews / 4.86 out of 5

    I would highly recommend this construction company. I have used their services for the second time and once again I am very satisfied with the...

    Borehamwood
    Herts
    WD6 2JD

  • 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 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 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 Welwyn Garden City

Our average rating for Extension Builders

5.0 - 5.0 out of 5 from 2376 reviews

  • 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

  • LINX Design And Build, London

    5 out of 5.0

    "Linx team did a fantastic job with our plumbing and heating. Professional, efficient, and easy to deal with from start to..."

    David O'Doherty on 30th 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

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