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
218 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
120 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:
Utility Room Extension 10x2.5m
Unfortunately, we were unable to get the work done due to financial issues, however, throughout the process Rae communicated well and patiently and kept in touch over what became a long drawn out process that ultimately failed! Hopefully...
By sharpplayer on 17th Jan, 2023
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William Bennett Construction Limited
93 reviews • 98% positive ratingExtension Builder based in MansfieldTrade Member since 2012A family owned business with over 40 yrs experience. Specialising in all types of projects including extensions, new builds, bi-fold doors, replacement doors and windows and RSJs. We also complete external works, block paving and patios, landscaping and external rendering. read more
Latest Conversions - General feedback review:
Patio door removal and window fitted
Very good team,great to have people who were able to provide the new window along with doing the brickwork and plastering rather than having to contact separate people and try to fit everything together. Luke and his guys are friendly and...
By marie18042 on 31st Mar, 2022
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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:
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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RG CARPENTRY AND BUILDING 24HR LOCKSMITH
123 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 Carpentry feedback review:
Roof trusses
Richard, came and quoted the job. Very reasonably person who knows what needs to be done. In one day he and the team positioned roof trusses for my L shape roof. Went above and temporary covered all with felt to make it partly watertight...
By xx30802 on 3rd Nov, 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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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 Extensions feedback review:
House rear extension in SL3
My extension work was a 4m rear extension + garage to kitchen conversion with underfloor heating + front porch. Faizan's quote was in the mid range compared to other quotes I received. He started the works in very short time after we agreed...
By ashrafd on 6th Nov, 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:
Large side and rear extension
Chris was great throughout, gave best and clearest quote. Was willing to change spec within reason during the build and was really flexible fixing snags. I could not have chosen a better builder.
By brendan_58 on 3rd Oct, 2020
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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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Nagel Services
31 reviews • 94% positive ratingExtension Builder based in West MallingTrade Member since 2012Hi, my name is Laurence I have over 25 years experience in the building trade. Over the past 4 years I have expanded the company and become a LTD Company carrying out building works to include a Restaurant in Bromley and a New Build Barn and Barn Conversion in Ashford. read more
Latest Extensions feedback review:
Single Story Extension - Completed by end of May....
Large exension completed - Kept me updated, completed on time/budget - Returned, when asked 2 years after build, to rectify some minor issues. Trustworthy and highly skilled which helped to manage the stress of a major renovation. Thanks...
By user_p42 on 9th Aug, 2021
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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:
Remove timber stud wall and insert steel 'goalpost'
Alban and his team arrived promptly each day and worked with a high degree of care. Importantly, I would also add that Alban's team were a pleasure to have at the house during the works. I am an Architect alongside being the client in this...
By benjamin85776 on 25th Oct, 2022
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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:
Two storey side / single storey rear extension
Naz and his team worked with great professionalism, positivity, and commitment from start to finish of my project, building a large two storey side extension, single storey rear extension, and full refurbishment of a dilapidated existing...
By steve_monk on 13th Jul, 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 Restoration & Refurbishment feedback review:
Renovation of 5 bed period property and outbuilding
I can’t recommend Paul and team highly enough. Easy to work with, and all work done to a very good standard. I will definitely use Paul and team again!
By wbartholomew on 5th Apr, 2021
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NLB Construction Ltd
23 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 Loft Conversions feedback review:
Loft conversio
Very pleased with the work |Neil and his boys provided in doing my loft conversion always on time and the tidiest builders iv ever had the pleasure of meeting, always there when said they would be and informed me step by step of what they...
By anon-211008003003461080 on 7th Oct, 2015
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30 Day Extensions Ltd
21 reviews • 95% positive ratingExtension Builder based in WimbledonTrade Member since 2016Complted 90 extensions and lofts in a year. We build high spec extensions/lofts in 30 days/240 hours- watertight plaster finish. Opening high st shops first open at Wimbledon. Free! in house architect, Engineer and QS if you instruct us. We also build ECO friendly ICF read more
Latest Extensions feedback review:
Rear single storey extension and ground floor refurb
The guys were great. Peter sits on top but his teams operate really well. Pricing is good, and Susan keeps you informed the whole way through. Strongly recommend
By sleekmania on 8th Apr, 2022
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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 Restoration & Refurbishment feedback review:
Extensive refurbishment of 3/4 bedroom terraced house
I cannot recommend Baz enough! If you want a very skillful and honest builder with great ideas and an eye for detail you will find him in Baz. He will be behind the success of your project. A very good listening ear but also someone that...
By sissy_chara on 18th Feb, 2020
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 the UK have an average review score of 97% positive based on 130,927 homeowner reviews.
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Ask an Extension Builder
Our vetted professionals answer your home improvement questions
- Converting an old conservatory into kitchen
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