How it works
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Post a job
Tell us about your job, and we'll alert suitable extension builders in UK. 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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rcm carpentry
128 reviews • 99% positive ratingExtension Builder based in SeafordTrade Member since 2010We have a fully skilled team of guys who always strive to go the extra mile. Having been in Mybuilder for all these years I was one of the first to start my positive feedback. We pride ourselves on taking on one job at a time and fully concentrating on that job, not read more
Latest Extensions feedback review:
Extension & Open Plan Living
Rae and his team were amazing from beginning to end, this was a big build for me and he held my hand all the way through, he and his team took the time to understand the build, what I wanted to achieve and even though a couple of the things...
By darren40011 on 5th Sep, 2023
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Build It Developments Ltd
33 reviews • 100% positive ratingExtension Builder based in BasingstokeTrade Member since 2011We build homes,extend homes, alter homes, convert lofts & refurbish. read more
Latest Extensions feedback review:
Large extension and renov of detached family home.
We were so fortunate that Gary found us through MyBuilder. Gary and the BuildIt team made the biggest, scariest project of our lives a thoroughly enjoyable and fun process. Considering the scale of the project (a back-to-brick renovation,...
By matt93968 on 8th Jan, 2021
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Millington Construction Ltd
86 reviews • 90% positive ratingExtension Builder based in TauntonTrade Member since 2013we are a family run business with over twenty five years experience in building customers ideas on time and in budget We offer no obligation quotes for any of the following areas.Extensions, garage conversions, Building Renovations, groundwork Drainage, drives, patios, read more
Latest Extensions feedback review:
@ storey extension
On first meeting john, he turned up on time for quotes and meetings and was friendly and helpful. The groundworks went really well. The brickwork was a good standard.The living room was renovated at the same time. Concurrently the Loft...
By paul59837 on 16th Sep, 2023
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PJL Brickworks
110 reviews • 99% positive ratingExtension Builder based in LiverpoolTrade Member since 2016Hello I'm Paul. Thanks for reading my profile, I have 20 years experience in building With vast experience in most trades, My line of work is Domestic and Commercial extensions, Garden walls, Structural alterations, New builds Outbuildings, Conservatory read more
Latest Extensions feedback review:
Side return single storey kitchen extension
Paul did a good job building a side extension for us. We didn’t have plans and we are pleased how he has achieved what we wanted. Paul went out of his way to source new bricks when I didn’t like the ones that matched the original...
By ju90 on 27th Sep, 2023
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Aidan Property Developments Ltd
29 reviews • 100% positive ratingExtension Builder based in PrescotTrade Member since 2018Turn key extensions complete finish read more
Latest Extensions feedback review:
Double storey extension / loft conversion
Excellent Job done on time. Very happy with the finished product. Cheapest quote. Very good communication- I knew where I was at each stage. Kevin was very open to changes I made along the way. If I wasn’t happy with something- he...
By dave34590 on 7th Feb, 2022
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RW Building Services
37 reviews • 100% positive ratingExtension Builder based in CranleighTrade Member since 2009We provide a comprehensive specification and quotation for all our clients without obligation. Please look no further and be our client today and forever. read more
Latest Extensions feedback review:
Rear extens./double storey/above garage ext
Rodney and his team are hardworking, and punctual. Extremely respectful of neighbours and also of us living in the house throughout the project. Really flexible as well with some changes during the building process. Lovely finishes to the...
By fabsurrey on 30th Jan, 2021
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M.T.S Builders
31 reviews • 100% positive ratingExtension Builder based in WarminsterTrade Member since 2009MTS Builders Limited is an established and competitive building and construction company based in Wiltshire. Our portfolio includes the construction of extensions and alterations for domestic premises for various clients and architects throughout Wiltshire and Somerset. read more
Latest Extensions feedback review:
Garden Room Extension
Martyn and his team were excellent. All the guys were nice and friendly and did a top notch job. They tidied up at the end of the day of work, and kept us in the loop as to what was happening when and next. When they started they cracked...
By mandrake99 on 16th Oct, 2020
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LNB Building Solutions Ltd
55 reviews • 100% positive ratingExtension Builder based in BrentfordTrade Member since 2014We are specialise in all types of new builds from large extensions to loft conversions or building a new house with complete planning services with structure drawings and designing interior as well.We are members of federation of Masters Builders. First time buyers with read more
Latest Tiling feedback review:
Kitchen floor tiling.
I hired Lokesh to tile my kitchen floor. Lokesh is very professional and reliable and did a fantastic job. I will definitely be hiring Lokesh again in the future to do more work for me.
By maria_375 on 10th May, 2023
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Focus Builders
18 reviews • 100% positive ratingExtension Builder based in BoltonTrade Member since 2017EXTENSION SPECIALISTS: Please allow me the time to introduce Focus Builders the North West’s leading Extension/Permitted Development Specialists with over 35 Years experience in Domestic House Extensions. Our complete Design and Build package takes all the stress read more
Latest Extensions feedback review:
Bungalow rear extension
Sean's team has done a great job. Tim and Carlos are very professional and the quality of work is of high standard. The team is very flexible and provided a number of suggestion for the improvement of our house with reasonable price. If...
By rhys_285 on 27th Jul, 2023
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RG CARPENTRY AND BUILDING 24HR LOCKSMITH
125 reviews • 100% positive ratingExtension Builder based in HuntingdonTrade Member since 2008Rg carpentry and building are long establish company offering quality work and that personal attention to make sure our customers are happy with any job we undertake all The team are tried and tested and the best in there field of expertise, We have been working in area read more
Latest Roofing (Pitched) feedback review:
Roof structure assessment and inspection
Richard was quick to respond to my request and did a good analysis of the situation. He has vast experience and could provide the clarity I needed for the inspection. Would definitely recommend.
By alexraymond on 1st Dec, 2022
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ABC Construction (SCOTLAND) Ltd
31 reviews • 100% positive ratingExtension Builder based in GlasgowTrade Member since 2009As an experienced Structural Engineer with the team of great builders (including joiners, roofers, plumbers, decorators etc.) I provide my clients with the Design and Build service. read more
Latest Extensions feedback review:
Rear single storey extension (L-shaped)
I would first of all like to thank Andrew and his team for the hard work they have put in building us a fine extension. We have finally had our rear/side extension for the kitchen completed after 10 months of build. We are very happy with...
By anon-220911004502321522 on 10th Sep, 2016
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CSN building contractors
17 reviews • 100% positive ratingExtension Builder based in LeedsTrade Member since 2014Hi I'm Chris, CSN is based in the Temple Newsam area of Leeds , we are extension specialist with a 5 star rating, all our work is available to view and also speak to our happy customers, if you want the job doing properly and the price to be competitive then please give us read more
Latest Extensions feedback review:
Kitchen extension and fit-out
Our decision to go with Chris's CSN Building Contractors proved to be good one. We've ended up with the extension we wanted at a decent price and completed in an acceptable timescale. Chris's tradespeople were a hard working bunch and the...
By braemarstan on 15th Mar, 2021
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Beech Hill Installations ltd
40 reviews • 93% positive ratingExtension Builder based in MansfieldTrade Member since 2009Welcome to Beech hill installations ltd ,We are a small friendly company with a very big reputation.We offer a service from design to completion with years of experience we should be your contractor of choice. We look forward to hearing from you and helping you complete your read more
Latest Extensions feedback review:
Single story extension
whole build process made easy with good communications and the ability to adapt plans or adjust the build as it progressed, would have no hesitation in recommending them and would certainly use them again
By jason_571 on 6th Nov, 2018
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282 building solutions Ltd
32 reviews • 97% positive ratingExtension Builder based in ChoppingtonTrade Member since 2014Hi Welcome to my profile. 282 building solutions Ltd is a family business its our aim to give a smooth and stress free build. I'm a time served joiner and have worked in the building trade for 30 years I cover all areas of building work, extensions & joinery work. I read more
Latest Extensions feedback review:
Single storey flat roofed extension+garage conversion
282 Building solutions, have done a marvellous job for us, even neighbours commenting on the way the job has been accomplished. The rubbish was cleared from the front of the house at routine intervals and there was a minimum of noise and...
By gary_1tyk on 15th Jul, 2023
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Ava Constructions & Decors Ltd
30 reviews • 100% positive ratingExtension Builder based in HayesTrade Member since 2014Ava Constructions & Decors strive to offer bespoke service in building.We Offer Project Management and ready to provide quality service.In these years I learned to respect customers requirements and to apply them in accordance with the Building Regulation.Punctuality and read more
Latest Extensions feedback review:
Shower room/toilet extension
We are very glad that we hired Deep. He is a very pleasant and very punctual person. He has explained in detail each step of the build with us. We are satisfied that he is a very good project manager and sorted out everything from the...
By angela_29 on 31st Oct, 2023
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Jw carpentry and build
16 reviews • 100% positive ratingExtension Builder based in BristolTrade Member since 2019Hello, my name is Jason, been in the building trade for 29 years, We have a great team behind us to deliver your building projects. read more
Latest Extensions feedback review:
2nd Story extenstion
Jason and team are friendly and knowledgeable. I was very impressed that the project stayed on budget with no deviation from the quote, and we even had some extras thrown in. Timescales were longer than we expected, and there are times we...
By ian95460 on 8th Aug, 2023
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Extension Kings Ltd
87 reviews • 100% positive ratingExtension Builder based in HollowayTrade Member since 2017I've been working in building trade for over 20 years , I can undertake any job small and big from foundations to the roof and anything between. I can provide any references and I have insurance of £5 million. Me and my team take pride at what we do and we do it first read more
Latest Conversions - General feedback review:
Brick wall alterations - work needed to start ASAP
Highly recommend! Really pleased with the work. Alban was always responsive, helpful and kept his promises. Will definitely use again.
By bella_clo on 1st Apr, 2022
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JNR Building Ltd
69 reviews • 100% positive ratingExtension Builder based in NorwichTrade Member since 2008Julian has worked for big contractors as well as small builders in his local area and has been running his own business for the last 15 years. Although Julian's main trade is brickwork, he has a fully qualified team which can cope with all jobs big and small, whom you read more
Latest Restoration & Refurbishment feedback review:
House requiring full refurb
Julian and his team were fantastic throughout the complete refurbishment of our 6 bedroom property, with rear extension. Professional, friendly, competitively priced, well managed and with a high standard of finish. Due to their...
By atr_day on 9th Sep, 2023
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v. ghinda
41 reviews • 98% positive ratingExtension Builder based in BelvedereTrade Member since 2012Established 12 years ago we are a professional team specialised in Construction as Extension, Loft Conversion, Painting and Decorations, Carpentry and Joinery, Kitchen Fittings, Bathrooms, Flooring, Plastering, Underfloor Heatings, Electricity 6 years registration with read more
Latest Restoration & Refurbishment feedback review:
Stable Block Refurbishment
Vasile did a great job. His experience, advice and quality workmanship means I’d recommend him without any hesitation. I will definitely use him again!
By darrenroos on 28th Jun, 2023
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Gerrie and Son Building
27 reviews • 96% positive ratingExtension Builder based in PetersfieldTrade Member since 2014Gerrie & Son Building is a family run business that has been operating for over 55 years in Hampshire and Surrey, Started by my grandfather and father a bricklayer and Carpenter/Joiner respectively. We provide a full range of building services specialising in home read more
Latest Extensions feedback review:
Rear single storey extension and loft conversion
A positive experience from start to finish. Paul and his team were hard working and professional but also friendly and worked hard to minimise the disruption where possible. Good communication throughout the project and their experience...
By jamesems on 9th Oct, 2023
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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Extension Builders working in the UK have an average review score of 97% positive based on 148,010 homeowner reviews.
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Ask an Extension Builder
Our vetted professionals answer your home improvement questions
- Can a conservatory be converted into a extension?
- Damage to neighbour's property
- Does anyone know of a user friendly estimating software for extension or small build costing that is designed for a small to medium sized company?
- Idea of cost for second floor extension only