How it works
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Post a job
Tell us about your job, and we'll alert suitable extension builders in Welwyn. It’s simple and free.
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Tradespeople respond
Once your job is posted, you'll get responses from interested extension builders through the website.
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Review and choose
Browse profiles, work history, and feedback, then choose who you wish to share your details with.
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Taylor building solutions
101 reviews • 100% positive ratingExtension Builder working in WelwynTrade Member since 2019Thanks for viewing our page if your looking for a friendly family run carpentry and building firm then your at the right place. We undertake all types of work no matter how small an pride ourselves on attention to detail. We specialise in extensions and conversions and have read more
Latest Carpentry feedback review:
Skirting + Coving (2 x rooms) ASAP
Very pleased with the job completed by Taylor Building Solutions. They are reliable and left the place tidy. Many thanks!
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Mc Donald Ltd
No reviews yetExtension Builder working in WelwynTrade Member since 2020Mc Donald offer a wide range of services that cover the entire project. From concept to completion. Our wide range of capabilities means you’ll always have our in-depth expertise, experience and know-how at your disposal. By providing every service under one roof, Mc read more
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DJ Cox Building Services Ltd
No reviews yetExtension Builder working in WelwynTrade Member since 2019All building work, extensions, loft conversions, electrics, plumbing, plastering, bricklaying, patios, drives, bathroom & kitchen fitting, fencing. read more
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Michael Biggs
No reviews yetExtension Builder working in WelwynTrade Member since 2022Quick, efficient and neat work. Team of two. Can do everything start to finish read more
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Noel Clancy
No reviews yetExtension Builder working in WelwynTrade Member since 2020Noel Clancy building services was established in 2011 but I have been in the trade for 25+ years. Taking on projects from kitchen fitting, bathrooms/wetrooms to extensions and loft conversions. Covering all trades including brick laying, plastering, carpentry, tiling, read more
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Maytrix Construction Limited
2 reviews • 100% positive ratingExtension Builder working in WelwynTrade Member since 2013Maytrix Construction Ltd was formed in 2012, our management team and key staff has over 90 years of combined experience delivering high end construction projects, so you can be confident that our unique blend of expertise and experience means we deliver schemes to the exact read more
Latest New Builds client reference:
New build brickwork and block work done on budget and on time. Workmanship excellent. Maytrix kept me informed on progress and were very helpful tradesmen who were always on time.
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Mars Building
3 reviews • 100% positive ratingExtension Builder working in WelwynTrade Member since 2014Mars Building is a local family run business with four generations of experience in the building and carpentry trade, all our workers are fully qualified and all our work is fully insured so if we're in your house you know you're in safe hands read more
Latest Conversions - General client reference:
All the work carried out was professional clean and tidy Ricky was on time and on budget I found Ricky to be helpful, patient and considerate. He listened carefully and totally understood what I wanted from the conversion. He is a talented...
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B Williams groundwork & brickwork
No reviews yetExtension Builder working in WelwynTrade Member since 2021All groundwork/ foundations and brickwork/ blockwork. 20+ years experience read more
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Nick's Authentic Carpentry and Building
3 reviews • 100% positive ratingExtension Builder working in WelwynTrade Member since 2011We're a new company but have the experience and knowledge of any other company.We're professional, organised, and give our customers what they expect and deserve. Being proud workers and undertaking everything thats thrown at us, Our focus is the job we're on! read more
Latest Kitchen Fitting client reference:
He did a complete kitchen renovation which included new roof and ceiling and some building work. They did an excellent job they were very good and always on time and I was very pleased with the result. I would recommend them one hundred...
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Lee Construction Builders Ltd
7 reviews • 100% positive ratingExtension Builder working in WelwynTrade Member since 2008Lee Construction Builders LTD are your local Builders in Stevenage. We offer free quotations and can build your project for a fixed price. All our team are fully qualified and experienced tradesmen that have seen and dealt with every building challenge possible. We have a read more
Latest Roofing (Pitched) feedback review:
Leaking roof
Fantastic job; quick reply; thorough professional job. Lee really likes doing the job right; certainly not a cowboy. He really took his time in assessing the problem. Very neat job from the inside and out. Highly recommended.
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Imperium Build
No reviews yetExtension Builder working in WelwynTrade Member since 2019Bricklayer for 26 years doing my own building work for last 12 years extension new builds al aspects of building start to finish,paving patios.internal steel works read more
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Landmarx
2 reviews • 100% positive ratingExtension Builder working in WelwynTrade Member since 2017Small friendly family run business with over 30 years construction and refurbishment experience. We offer all types of building services wether it is a small maintenance job to a new build . We work on commercial and residential buildings. We also provide project management read more
Latest Kitchen Fitting client reference:
Keith has helped design and fit our kitchen/utility room. Has re felted the flat roof on my garage and extension. He is currently fitting all my doors, skirtings and door linings. He boarded up and plastered doors where we have removed...
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DMS Home & Gardens Ltd
No reviews yetExtension Builder working in WelwynTrade Member since 2017Covering all aspects of building work from groundworks up to roofing, alterations, renovations, conversions, Landscaping & property maintenance. I am a reliable builder/tradesman, who is professional, tidy and committed to ensure your project runs as smoothly as read more
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N.N2 GENERAL BUILDING
No reviews yetExtension Builder working in WelwynTrade Member since 2022General building. EXTENSION, LOFT CONVERSION,GARDENS DESIGN,KITCHEN, BATHROOM, ROOFING,PLASTER &RENDERING, DECORATING, DRIVEWAY, PLUMBING, ELECTRICITY... read more
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The Datchworth Group
31 reviews • 97% positive ratingExtension Builder working in WelwynTrade Member since 2018Yates Home Improvements & The Datchworth Group, are sister companies, that together achieve a wide range of construction projects. whether you wish for an extension or loft conversion to a new construction building, we can complete the project from start to finish. All read more
Latest Plastering feedback review:
Plastering/skim of 2 ceilings with cornicing replaced
Dominic and his colleague a very good job of plasterboarding and plastering my ceiling. The work included the installation of coving. Dominic is courteous and hardworking and I recommend him as a multi-skilled contractor. I'm making...
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C Jennings Building
No reviews yetExtension Builder working in WelwynTrade Member since 2021We are a building company based in Hertfordshire. We carry out general building work including steel installations, building & garage conversions, extensions and new build garages. read more
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Taurito Property & Garden Maintenance
5 reviews • 80% positive ratingExtension Builder working in WelwynTrade Member since 2022We are a Family run Property Maintenance Company from Stevenage. Anything from Painting and Decorating, Kitchen and Bathrooms including renovations and extensions! read more
Latest Garden Maintenance feedback review:
Grass cutting
Really good will use again
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DMV Builders
No reviews yetExtension Builder working in WelwynTrade Member since 2015Advanced craft NVQ LEVEL 3 Brickwork Over 20yrs experience read more
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LC Construction
No reviews yetExtension Builder working in WelwynTrade Member since 2019I have been running my own building and construction business for approx 30 years, with over 35 years of industry experience. I am a fully skilled carpenter by trade but have vast amounts of knowledge and experience in all aspects of building and construction works. The read more
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A1Z Construction Limited
No reviews yetExtension Builder working in WelwynTrade Member since 2021Fast growing construction company We are happy to provide wide range of construction services including all types of extensions, new built, home renovation, ground works read more
What can extension builders do?
MyBuilder is the simplest way to find a reviewed and vetted extension in your local area. We can connect you with local extension builders near you, so you can choose the ideal tradesperson for your project with confidence.
Whether your plans are big or small, we can help you find a skilled extension builder to support you with your job. Your contact details are only shared with tradespeople you want to speak to, so you can check out their credentials, read honest customer reviews and get free quotes to compare.
There are lots of jobs that extension builders can help with, including:
- Extending your home with an extra room
- Two+ storey extensions
- Adding partition walls to create more rooms
- Building annexes or external structures
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