Extension Builders in Mountain Ash | MyBuilder

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Some of our top rated extension builders in Mountain Ash

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Ppd building and roofing
Rating: 5 out of 5
Extension Builder in Mountain Ash
All building work undertaken, no job too small or big,30 years experience.
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Latest review:
Bricklaying- 3 Dec 2021
Paul did a fantastic job taking down my existing 30m fence and replacing it with a 2m high block wall, and rendering it to my chosen colour. Paul listened to every request I had and carried them out perfectly. He managed to put a really nice curve on the wall rather than the normal stepped approach, which I was less keen on. He managed to save a fir tree and line of bamboos that I felt sure would be impacted or need removing during the building work. Paul and Rob cleaned up after themselves every day, and were very respectful nice chaps. The job did take longer than expected, but each delay was beyond Pauls control, and overall I am delighted with the result.
A.L.P plastering & building
Rating: 5 out of 5
Extension Builder in Mountain Ash
Hi. We offer a very high standard of work we take on all aspect of building work from garden projects. House renovation,new builds , extension. We have qualified plumbers and electricians that work along side us. So we have a very good skilled team. We are helpful and polite.
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Latest review:
Extensions- 31 May 2023
We hired Anthony back in January after he gave us in what we thought was a very good quote, Anthony was quick to respond and he was very thorough with the job moving forward, he took over from another builder who didn’t do a very good job, and Anthony took over and we are delighted he did. Anthony and his team were always on time, clean and their eye for detail is excellent. They would always talk us through the next steps and if we had any questions he would always re assure us and give us brilliant advice, I couldn’t recommend Anthony enough he has saved our house and made it a home again, if anyone is looking for any building work anthony is your man, top man anthony thank you very much 👍🏻
ecas systems
Rating: 4.7 out of 5
Extension Builder in Mountain Ash
We are an established construction business with a qualified, dedicated and friendly building and electrical team who guarantee a high standard of work with value for money. We can carry out any kind of home refurbishment that you may require from an extension to a new bathroom or kitchen. All our work is guaranteed and customer satisfaction is top of our list !!
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Latest review:
Extensions- 2 Sep 2019
Good start so just need to maintain momentum.
Orange Grove Construction
Rating: 5 out of 5
Extension Builder in Mountain Ash
Started own business in a partnership deal in 2008 with long time friend who had been working as a soul trader for 6 years. We are now trading under the name of Orange Grove Construction and in this present climate have been very busy with continuous work ranging from extensions to renovating/loft conversions, kitchen fitting, bathroom fitting, wall and floor tiling, plastering and rendering, U.P.V.C, basement conversions, conservotories, fencing, garden walls, patio laying, fascia and soffits and guttering. When we set out, we only advertised for one month to pick up work, the rest of the work came in from word of mouth.
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Latest review:
Conversions - General- 30 May 2013
Dave Phillips was brilliant. Friendly and accommodating, nothing was too much trouble. He converted our garage into living space, always solving the small problems builders face as they make progress. He has a really good network of reliable specialists for electrical, plastering...etc, all of whom he has known for decades. A perfect example of excellent small business. I have already recommended him to our friends and family, as a result he has lots of new business keeping him busy. Our friend's house needed full refurb, some very serious work, and Dave was available on the phone 24/7 when not at their house. As soon as we can afford to do more work on the house, Dave will be our first choice builder, in fact, we will wait until he is available to do any future work on our property.
CLM Windows and Doors
Rating: 5 out of 5
Extension Builder in Mountain Ash
Hello, CLM Windows and doors is a family run buissiness. CLM will work together with customers to design and experience the new look of your homes and work places. We aim to satisfy every customer and provide a high standards of work. CLM employees are friendly and polite.
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Latest review:
Extensions- 19 Nov 2020
Excellent from start to finish. Nothing was too much trouble and came in with some great ideas around design. Highly recommend. First class job
R Rowley plastering
Rating: 5 out of 5
Extension Builder in Mountain Ash
Qualified solid and fibrous plasterer, All aspect of plastering undertaken. 15years plus on site and domestic refurbs Degree educated qualified construction lecturer for 5 years. Portfolio available with recommendations R Rowley plastering
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Latest review:
Plastering- 4 Sep 2020
Living room walls and ceiling plastered. Communication leading up to the job and during was great. Richard was great to deal with. Started first day and arrived early which is always a good sign. I went away for a few days whilst work being done and Richard kept me informed and sent through pictures and video. Really, really pleased with finish and can’t wait for it to dry out now. Cleaned up once finished too. Richard to come back to finish off once other works done and this hasn’t been a problem with him either. Would definitely recommend.
Rjm home improvements
Rating: 5 out of 5
Extension Builder in Mountain Ash
I’m a carpentry and building company focused on quality craftsmanship, honest work, and attention to detail. I specialize in custom builds, repairs, and renovations, delivering reliable results you can trust. Every job is done with pride and built to last.
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Latest review:
Fencing- 24 Apr 2026
Very professional called out same day and was very thorough very good quality and worked to a high standard will definitely use again
BLP groundworks
Rating: 5 out of 5
Extension Builder in Mountain Ash
BLP groundworks our type off work consumes off new build houses , extensions , foundations , conservatory bases , mini digger hire , retaining walls , drainage , driveways , patio & steps , garden maintenance . We have 15years experience in the construction game and always looking for new challenges. There is no job to big or small for BLP groundworks
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Latest review:
Groundwork & Foundations- 14 Oct 2019
Good job well done . Trusty bunch of lads worked tirelessly in extremely bad weather.
Cosy construction
Rating: 5 out of 5
Extension Builder in Mountain Ash
Hi all I've got 30 years experience in the building industry.im a bricklayer by trade.i cover resin drives,patios,extentions,fencing,house renovations, painting,what ever comes my way
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Latest review:
Driveways (Tarmac Surface)- 12 Jan 2026
Excellent work, they done a amazing job on drive way couldn't be happier, the whole team were great I'd highly recommend using them.
Engwell Building Services
Rating: 5 out of 5
Extension Builder in Mountain Ash
I am a qualified Bricklayer. Engwell Building services are an established business with over 25 years of experience in the field. Based in Penpedairheol (Hengoed), Engwell Building Services has an ever growing customer base, through the Local Valleys area all the way to Cardiff. Providing services for individuals and organisations like Local Councils and Churches. Whatever your need, don’t hesitate to contact us and see how we can help you.
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Latest review:
Extensions- 5 Sep 2025
We are so glad we chose Mark and the team! From start to finish. Sorting the structural calculations, dealing with the building control department and co ordinating the contractors needed to complete the job. Great communication, trustworthy and a pleasure to deal with. In some ways we are sad that they have finished! Quality work, completed in good time. Scheduled payments as the job progressed. Running my own business I am always critical of other services. I can safely say there isn’t one thing I could criticise. Building control required additional specifications but Mark didn't charge us any extra. A man to his word and price. We are so happy with the end result. Would highly recommend Engwell Building services. Top people. Top job.
KVC Carpentry and Building
Rating: 5 out of 5
Extension Builder in Mountain Ash
KVC Carpentry & Building has a wide range of knowledge in all areas of the building trade. We offer an all round building service so you don't have to organise different trades. We cater from the smallest of jobs to the largest of projects such as extensions. We work with you every step of the way.
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Latest review:
Tiling- 10 Apr 2016
Kieran did an awesome job of both enlarging my loft hatch, fitting a loft ladder and both tiling and flooring my bathroom. He is super helpful and a really nice guy who will always do his utmost to make sure the client is happy. Kieran has also done work for two of my neighbours who can't speak highly enough of his work. I can recommend KVC 100% and will definitely be using Kieran again in the future!
DLF Developments
Rating: 5 out of 5
Extension Builder in Mountain Ash
Property development Extensions New builds Landscaping Driveways Roofing
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Latest review:
Driveways (Paved & Loose)- 20 Nov 2023
Excellent work from Daniel and the boys and was flexible on price too. Drive was done in just a few days.
DMS Carpentry and Build
Rating: 5 out of 5
Extension Builder in Mountain Ash
I am a fully qualified carpenter. With 20 plus years experience in all the building industry. Great customer service.
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Latest review:
Windows & Doors (Wooden)- 2 Jan 2025
Excellent services from DMS carpentry. I would highly recommend.
Precision Carpentry and Building
Rating: 5 out of 5
Extension Builder in Mountain Ash
All aspects of Carpentry and Building work undertaken. -Internal to external Carpentry Specialists. -Loft Conversions -Flat Roofs, EPDM -Fascia and soffit -Dry lining -Media Walls -Glass Balustrades -Stair case renewals and many more..
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Latest review:
Loft Conversion- 26 Apr 2024
Used Precision Carpentry for our loft conversion. They did a fantastic job, absolutely cannot fault them. Kept us updated all the way through and can tell they really take pride in their work. Would 100% recommend them to anyone.
Cozens Carpentry & Electrical Contractor
Rating: 5 out of 5
Extension Builder in Mountain Ash
All aspects of construction.
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Latest review:
Loft Conversion- 15 Apr 2026
Fair price, very friendly and professional. Job took a little longer than first thought. But completed to good standard. Thanks Andrew!
JP Carpentry
Rating: 5 out of 5
Extension Builder in Mountain Ash
Jp carpentry has been operating around for 10 years undertaking all aspects of first and second fix carpentry, bathrooms, kitchens and small extensions..
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Latest review:
Joinery & Cabinet Making- 1 Mar 2021
Our under stair storage now completed, and what a superb job!! No hesitancy in recommending. Job completed to a very high standard and even made a good job of cleaning up after completion.