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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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:
Single storey extension 3.5 by 5 metres
Gary has been a great help. He came and viewed the site for a quote, got the job done quickly and efficiently with minimal disruption to us or our neighbours. Building looks fantastic with good quality workmanship and materials.
By emma20397 on 26th Sep, 2020
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UNIQUE REFURBISHMENTS
219 reviews • 100% positive ratingExtension Builder based in RomfordTrade Member since 2009Unique refurbishments provides a full building service. We are fully qualified tradesman We are a team well more like a family to be honest. We all have a roles in the team and everyone is 100% all the time. We pride ourselves in being the best at what we do Also a read more
Latest Loft Conversions feedback review:
New dormer loft conversion on Victorian mid-terrace
We had a two bedroom, one bathroom loft extension and are very happy with the outcome. Bathroom is fitted to a high standard and looks great. Thanks very much!
By maya_47 on 28th Dec, 2022
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rcm carpentry
121 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:
Single storey extension
From the start Rae gave us advice and went out of his way to make sure we were happy with the work. Excellent communication, absolutely reliable and well organised; Rae has a brilliant network of tradesmen. Despite some weather issues the...
By clubberlang on 27th Feb, 2023
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Millington Construction Ltd
83 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 Loft Conversions feedback review:
Dormer loft conversion
I couldn't have chosen a better company. They have done an amazing job, come up with some brilliant ideas which solved problems and been quick to deliver. John has kept me informed throughout and listened to what I needed. He's been honest...
By sarah17150 on 20th Nov, 2022
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RW Building Services
36 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:
Single storey extension
Late review but Rob's team did a brilliant job on our extension. They worked solidly from early to late and accomodated changes as things progressed. They finished the project to a brilliant standard and I wouldnt hesitate to use them again...
By gemmyp on 13th Apr, 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:
Attic conversion or side extension
Our side extension on our 1930's house has just started in the last few weeks and we couldn't be happier. Martin is fantastic at managing all aspects of the project and so organized, he goes above and beyond. His team are professional and...
By sarah84084 on 14th Oct, 2020
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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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Land Trades Construction Ltd
28 reviews • 96% positive ratingExtension Builder based in UxbridgeTrade Member since 2015Land Trades Construction is privately owned business that has evolved from small beginnings to that of an innovative, reliable and flexible contractor. We are a family-owned business that offers a professional service with a personal touch. We are easy to reach and quick to read more
Latest New Builds feedback review:
Build new 4/5 bed
Don't make the mistake is I did when I did not believe previous negative reviews left by clients on google. Faizan is a scam artist and awful workmanship. All was going well until the project was coming to the near finish where his workers...
By lisa49244 on 24th Oct, 2022
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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:
Wrap around, mostly double storey, extension
Chris and his team built our double storey wrap-around extension which was completed in April 2021. It was a big job, he stuck to the quote and timeframe and we are so pleased with the end result! There were a few hiccups here and there...
By kelly913 on 28th Jun, 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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Extension Kings Ltd
86 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:
Enlarge opening on brick shed for new door
Alban and his team arrived on time, the work was done as per the quote and completed to a high standard, his team were helpful with everything we wanted. they cleaned up thoroughly after the job. I would use Alban again for any work we may...
By mr53707 on 3rd Dec, 2021
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Prohaus Ltd
23 reviews • 100% positive ratingExtension Builder based in SurbitonTrade Member since 2015We have a number of years experience of working in the industry, we have done a range of different projects over the years including domestic work along with commercial work and shop fitting. We can take on projects of all sizes, from small renovation works to project read more
Latest Extensions feedback review:
single storey rear extension (+ poss loft conversion)
I have been promising Nat to complete this feedback since he and his men finished this work and I feel very bad for not doing so until now. When I was planning for this build I was very nervous as I knew that the house was going to be my...
By denny_18 on 25th Oct, 2018
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v. ghinda
39 reviews • 97% 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 Electrical feedback review:
Garden lighting
This guy is a con artist do not employing whatsoever he come to my property and we agreed a price including all cables he come to turn up to my property and demanded that I pay absolute cowboy avoid at all costs
By maidstone_landlord on 6th Jun, 2022
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PWD CONSTRUCTION LTD
37 reviews • 97% positive ratingExtension Builder based in WareTrade Member since 2014I established my business to meet the needs of homeowners looking for skilled and qualified tradesmen that put trust at the top of their requirements. From small jobs to large extensions and landscaping we can help to make your property dreams come true. Money back read more
Latest Extensions feedback review:
Ground Floor - possible 2 Storey extension.
We hired Paul and his team to demolish our conservatory and build a ground floor extension in its place which we use as a playroom, a few months ago (June 2021). This was the first time we had any major work done to our house and we could...
By aj_mathias on 20th Oct, 2021
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NLB Construction Ltd
24 reviews • 100% positive ratingExtension Builder based in PeterboroughTrade Member since 2008As a fully insured business and member of the federation of master builders and Trust Mark ,we focus on our clients and their needs so every job is finished to the highest standard at a budget suited to them. Also we manage all our trades in house. We are very proud of read more
Latest Extensions feedback review:
1st floor side extension
Neil did an excellent job at doing our 1st floor extension, I also requested for him to carry out a few extra jobs and nothing was too much trouble, he made sure he left it clean and tidy after each day and also ensured that it was left...
By bobhawkswell on 28th May, 2021
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30 Day Extensions Ltd
21 reviews • 95% positive ratingExtension Builder based in WimbledonTrade Member since 2016Recently completed 96 projects in 2022. •Fantastic reputation, reviews on google and webpage. • Speed, we build shell in 30 days. •priced by a QS and we add 15%. Simple! • free planning. •Shops-Wimbledon open and Surbiton and Streatham soon. •Highly skilled read more
Latest Extensions feedback review:
Clapham SW11, single story, side-return extension
A really excellent set up of builders. Peter was great in evaluating the work and what we needed done. Sue was clear in her communication on costs, and then execution of the works by Taras and his team was superb. The extension was built...
By julian87460 on 30th Nov, 2020
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Smiley Builders
16 reviews • 100% positive ratingExtension Builder based in South NorwoodTrade Member since 2009Smiley Builders are a highly experienced multi-trade team specialising in Extensions, Loft & Garage Conversions, Full Refurbishments, Bathrooms & Kitchens in SouthEast London. We have secured a reputation based on, first class workmanship, efficient management skills and a read more
Latest Extensions feedback review:
Single storey rear extension
Very constructive input throughout the whole process. We were given a clear idea of timescales for every step of the build, what to expect and how they would minimise disruption to our household which was all done effectively as promised....
By phil24773 on 4th Aug, 2019
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JNR Building and Maintenance LTD
64 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 12 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 Extensions feedback review:
Consevatory conversion
Converted a conservatory into a dining room extension. Great conversion, really pleased with Julian and the team. Highly recommended, would use again without hesitation.
By mr67652 on 22nd May, 2022
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LNB Building Solutions Ltd
52 reviews • 100% positive ratingExtension Builder based in StainesTrade 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 Restoration & Refurbishment feedback review:
Refurbishment of the house.
We invited Mr. Lokesh Nagpal for the job and found him to be very polite and professional. We saw some of his other job and found it of very good quality, so we gave him the work. He completed our work in good time and with good quality...
By shamsa33682 on 13th Mar, 2023
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282 building solutions Ltd
30 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 as possible. I'm a time served joiner and have worked in the building trade for 25 years I cover all areas of building work, extensions & joinery read more
Latest Extensions feedback review:
Kitchen extention
Can't fault the work at all and will recommend to others 100%.
By guy75188 on 6th Jul, 2022
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 134,093 homeowner reviews.
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Ask an Extension Builder
Our vetted professionals answer your home improvement questions
- How near can my neighbour build an extention to my boundry, the size he is considering does not require plannning concent.in adition this extention is going limit view / sunlight can i object?
- 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?
- Where do i start with planning a single storey extension? how much should i be paying for architects plans?
- Idea of cost for second floor extension only