How it works
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Post a job
Tell us about your job, and we'll alert suitable extension builders in Wales. 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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R W Langford Builders Ltd
8 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2016R W Langford Builders are a family run business that offer a friendly and reliable service and believe customer relations and satisfaction is a top priority. We can complete any building job from start to finish making it a stress free experience for our clients. All work is read more
Latest Extensions feedback review:
50m sq single, 7m sq dbl extension and a dbl garage
Bob and Craig did an amazing job on our extension, garage, 3-tier patio and fences, as well as a new window, wider door way and window replacements in the existing house. We received quotes from a dozen firms, but their quote was by far the...
By greesevans on 13th Jul, 2020
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Mark Cater
50 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2015I offer a wide range of trades. Covering all areas of work. I am very hard working and offer a very competitive rate. I keep very good communication with the customer. I am reliable and always start work on time. read more
Latest Extensions feedback review:
Bungalow extension- family room and ensuite bedroom
This work was needed to provide suitable accomodation for my disabled father and we are all delighted with what has been achieved. Despite the many problems caused by covid 19 lockdown restrictions with problems sourcing materials, Mark...
By katharine65840 on 20th Apr, 2021
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Donald Thomas Builders
4 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2013Hi, my name is Donald of Donald Thomas Builders. With over 25 yrs experience in the building trade and many contracts behind me, I have a good understanding of what clients require and I'm always happy to give my input and expertise to a project. read more
Latest Extensions feedback review:
Builder required for extension
We had 'Donald Thomas Builders' to build our extension. We were quite nervous about the process as it is a lot of money and you hear such horror stories. We needn't have worried. Donald approached the quotation process and the build in a...
By anon-230111040004879758 on 20th Dec, 2016
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S.H.PHILLIPS BUILDING CONTRACTOR
2 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2012We are a well established family business trading for 30 plus years offering all aspects of building works with friendly and professional service. No job too small free estimates and quotations with no obligation. read more
Latest Extensions client reference:
Steve undertook the conversion of a 50 x 20 foot stable block annexe on my Grade 2 listed former coach house to create an enlarged domestic dwelling. The old roof was removed back to below the wall plate, a new roof was cut to alignment and...
Reference taken by MyBuilder on 23rd Aug, 2012
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C J Nowell Construction
1 review • 100% positive ratingExtension Builder working in WalesTrade Member since 2019We are a family run construction company with over 15 years experience. We are highly experienced in all aspects of the building trade, from groundworks to plastering, painting and decorating, we have it covered. read more
Latest Extensions feedback review:
Single storey extension
Excellent workers, polite, informed and punctual, great job, will definitely use them again, patio looks amazing! Great price too!
By mick57681 on 24th Jun, 2020
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Powys Builders Limited
2 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2015We are a family run business with over 30 years experience in all aspects of building work. We can provide references and have numerous testimonials from previous clients. We employ fully qualified tradesmen for all sorts of jobs no matter how small or large, we are very read more
Latest Bricklaying feedback review:
wall around pound
work was done well. would recmend them to others looking got jobs done
By anon-211128010004439264 on 14th Oct, 2015
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T.W.Carpentry & Building
7 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2016I run a well established and VAT registered Carpentry & Building business with over 15 years experience. I have an experienced qualified team of tradesmen who are more then capable of carrying out all types of building work. All of my work is completed to the highest read more
Latest Carpentry feedback review:
Plaster board installation
Tom’s boys worked with us initially plaster boarding the entire house and garage. Based on this experience, we kept Tom’s team on for the rest of our self-build project. They performed first and second fix carpentry throughout the whole...
By the_old_grazing on 20th Nov, 2020
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Bowen Building
53 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2015I am a professional tradesman and have over 30 years experience. I have a team of men who are here to do the best component work at all our customers houses as we would at our own homes. read more
Latest Restoration & Refurbishment feedback review:
Restore brick hearth behind cooker and install hood
The team at Bowen were fantastic. Efficient, polite, careful, and straight-forward. I'd hire them again on any job. And the end results were really fantastic - they talked with us at each step to ensure that work was done to a standard and...
By jeremy57370 on 26th Jul, 2022
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S C J CONSTRUCTION
30 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2008WE ALSO HIRE OUT TOOLS AND PLANT E.G DIGGERS, DUMPERS AND TIPPERS read more
Latest Bricklaying feedback review:
Repair old stone garden wall
Reasonable quote provided quickly ,work done to a high standard and tidied up after themselves .Would definitely recommend and use again .
By marie10423 on 5th Mar, 2022
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S.S Carpentry and General Building
No reviews yetExtension Builder working in WalesTrade Member since 2019Hello we are a construction company where no job is to big or too small. We we do all aspects building from new build to extension too renovation. Kitchen fitting bathroom fitting. Are fully qualified team will get the job done to a high standard. read more
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castell estate maintenance
8 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2013A family run firm built on reputation, we pride ourselves on customer care, so you can be sure of the highest standards. We specialize in barn conversions and period restoration,our trades men are fully qualified and happy to help. We design and build beautiful landscaping read more
Latest Roofing (Flat) feedback review:
Flat Roof.
Terry did a great job replacing the flat roof over my parents garage, even taking into account the very challenging weather. Good, open communication from start to finish and the most important element, keeping perfectly to his promises....
By jonnyboy_16 on 12th Mar, 2020
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MS Build Southern
52 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2020We are a dedicated team with more than 30 years experience in the building trade . Our expertise covers all aspects of building projects including extensions , loft conversions, kitchens, bathrooms , roofing ,renovations and refurbishments . We treat all our clients with the read more
Latest Roofing (Pitched) feedback review:
Purlins support needed!
The assessment of the work needed for the roof was comprehensive and fulfilled the structural survey repair needs fully. The work was completed to an excellent standard, tidy in progress and cleared up well at the completion. All the work...
By kafff17 on 17th Nov, 2022
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Barcud Coch Ltd
No reviews yetExtension Builder working in WalesTrade Member since 2022Barcud Coch Ltd carry out extensions, new builds, barn conversions and renovations in Ceredigion & North Carmarthenshire. read more
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D & M Jones Developers
3 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2017D & M Jones is a building company that helps you with all aspects of constructions. Our aim is to be recognised as one of the best building firms in the area. To ensure this we take our quality of work and customer service very seriously.Our team is skilled and delivers work read more
Latest Groundwork & Foundations feedback review:
Extension of existing foundation
Absolutely professionally done. That is the right company that we were looking for - correct, in a good price and friendly staff. We recommend it!
By telelink_uk on 15th May, 2017
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RM Builders
3 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2017I have been in the building trade for over 10 years,most recently gone self employed due to the experience gained during those years.My work ranges from stones work,block/brick,slabing to the likes of general building read more
Latest Bricklaying feedback review:
New wall
Great job no fuss very clean removed all rubbish will use again
By tim_vt4 on 15th May, 2020
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Mike Guest Electrical Plumbing Building
2 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2019Electrical work 18th edition registered Contractor All plumbing work Extensions building repairs and renovations New builds My own architect Roofing and painting read more
Latest Electrical feedback review:
Smoke alarms and certificate.
Good company, turned up on time, gave fair report , and generally left work area tidy.
By tony37984 on 31st Jan, 2020
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D.scaifeconstruction
2 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2020Hello there i specialise in renovations, extentions, stone walls, bricklaying, patios and all aspects ground works. read more
Latest Groundwork & Foundations feedback review:
Greenhouse
Job about to start all looks very positive for a great job
By david56146 on 4th Nov, 2022
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David Holmes
2 reviews • 100% positive ratingExtension Builder working in WalesTrade Member since 2016We are a small construction business based in west Wales. Our staff have been in the construction industry for over 30 years covering various trades from bricklaying, plastering, carpentry, groundworks and roofing. We undertake all works including new builds, extensions, read more
Latest Bricklaying client reference:
David has worked for us as a bricklayer and ground work specialist on various residential projects for over twenty years, and we have found him to be a conscientious and reliable builder with a very high standard of workmanship. David is a...
Reference taken by MyBuilder on 22nd Jun, 2016
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J J Construction
8 reviews • 88% positive ratingExtension Builder working in WalesTrade Member since 2018Sole trader construction business working on my own or with 1-3 employees, with 25 years of building experience in all forms of construction. Renovations, extensions, house remodelling and all forms of domestic building projects. In the past I have worked as foreman for read more
Latest Bricklaying feedback review:
Block extension shell
Jay has now carried out numerous big projects for me. He is now just completing a large and quite complex extension to my house. The standard of his work is fantastic with great skill and attention to detail it certainly is looking very...
By philip70520 on 22nd Feb, 2019
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LA brickwork
No reviews yetExtension Builder working in WalesTrade Member since 2020Hello there, I’m Luke from LA brickwork,I have worked all around wales and England building anything from garden walls to extensions to schools to retirement homes.All brickwork and masonry undertaken. Anything from garden walls to new builds. Thank you feel free to get in 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
Top Extension Builder Reviews
Extension Builders working in Wales have an average review score of 98% positive based on 3,589 homeowner reviews.
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Ask an Extension Builder
Our vetted professionals answer your home improvement questions
- Builder not turning up
- Tying in to existing brickwork/ continuous cavity in new + old walls
- Conservatory or extension
- Can a conservatory be converted into a extension?