Extension Builders in Avon

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (8 reviews)

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Some of our top rated extension builders in Avon

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Justin Milton
Sponsored
Rating: 5 out of 5
Extension Builder in Avon
Hi, I am Justin Milton. Together with my father Geoff we have built some of the most prestigious houses in Bristol and have 90 years building experience. Our portfolio of Developments is extensive in areas such as Clifton & Leigh Woods. We have also undertaken projects for the Royal Household and other blue chip corporate clients. Please have a look at the photos we have uploaded which highlights just a small percentage of some of the work we have carried out. Our reputation speaks for itself.
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Latest review:
Bricklaying- 28 Jun 2025
Great job, Justin was very communicative, honest, and got the job done for a good price. Very happy!
West Country Carpentry
Rating: 4.9 out of 5
Extension Builder in Avon
I have been doing carpentry and construction for 25 + years . We take alot of pride and care in the work we do, all work is undertaken by highly skill workmen . We are very keen to take on all sorts of jobs small or large and give 100% commitment and time to every job
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Latest review:
Extensions- 13 Apr 2024
I had a lot of work done inside the house, installing a kitchen and bathroom including the plumbing and electrics, knocking down walls and changing the layout of the rooms.The work took a lot longer than expected but was completed to a high standard. We had to wait a long time for windows which held everything up and was beyond the control of Martyn or the team.The team were professional and knowledgeable and respectful of us having to live in the house meanwhile.
Ryan purnell
Rating: 5 out of 5
Extension Builder in Avon
Experienced bricklayer with a strong record of delivering high-quality masonry work for residential and commercial projects. Skilled in brick and block laying, repairs, and decorative finishes, with a focus on precision, durability, and attention to detail.
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Latest review:
Ryan recently built a small brick wall for me, and I couldn’t be happier with the result. He turned up on time, was clean and tidy throughout the job, and was always polite and helpful. Ryan was clearly very knowledgeable and completed the work efficiently and to a high standard. The whole experience was great from start to finish, and I would happily recommend his work to anyone looking for a reliable builder.
MBBM
Rating: 4.9 out of 5
Extension Builder in Avon
Let me introduce myself my name is Dan, Butson construction limited, we cover all aspects of building Maintenance, kitchens, bathrooms, loft conversion, extensions, HMO etc, we are reputable reliable company that work to the highest standards. The quality of our work and quality of customer care is of paramount importance to us, we also offer design and build services from architects, structural engineers etc
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Latest review:
Extensions- 21 Oct 2025
Dan and his team did an amazing job of our single story extension. Dan provided a very comprehensive breakdown of his quote, which he stuck to throughout the build. We made a few changes as we went along and Dan accommodated these without hassle. The timescales were a little longer than planned, but this was due to the weather and other factors outside of control. Overall Dan provided us with a very competitive quote and met all our expectations in terms of quality and finish. We would have no hesitation in recommending Dan, and in fact we have done already to 2 of our friends :-)
Set Square Group ltd
Rating: 5 out of 5
Extension Builder in Avon
Set square group is a family run business. We are honest and reliable people who take great pride in each and every job we complete. We have good communication skills and find it a pleasure to deal with customers on a daily basis. No job too small.
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Latest review:
Extensions- 17 Nov 2024
We decided to just do single storey rear extension, full width of the house and 4.5 length with Ryan. As well doing extension, change ground floor layout, make old kitchen into utility room, downstairs toilet & shower, take down old kitchen window to make a hallway, then in living room, remove old patio doors and change it into double doors into the new extension. We wanted the boiler moved from our bedroom to new extension too. Installation of kitchen, flooring and painting was going to be done by us. All other work by them. It wasn’t just reasonable price and previous good review reason for choosing Ryan, Set Square was member of federation of builders, he come out couple of times, quote he give gave a good breakdown of work that was going to be covered. What I like about Ryan is the material he used was high quality and not cheap version ones. Overall, I think we were lucky that Ryan was available and we discovered him. Work done to high standard. Thanks Ryan and family.
TJ Building (Bristol) Ltd
Rating: 5 out of 5
Extension Builder in Avon
TJ Building (Bristol) Ltd, led by Thomas John Wood with 20+ years of construction experience, is a trusted company in the Bristol area. Tom and his team stay up to date with current UK Building Regulations, ensuring reliable work and well-informed recommendations.
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Latest review:
Extensions- 16 Sep 2021
Tom did an excellent job in completing my porch, despite having to work through a back injury. He was always prompt, and kept me informed of work in progress and timescales. He managed the job very well, and ensured that the door and window that were supplied by Price Glass were fitted in tune with the porch build sequence. He kept me informed of any changes to the budget caused by changes that were requested or necessitated by external factors. I would certainly recommend Tom for your project.
Wilson & Cole Developments Ltd
Rating: 5 out of 5
Extension Builder in Avon
Wilson & Cole Developments Ltd is a specialist construction company that carries out a wide range of services, including Loft conversions, Extensions, Renovations & New Builds. We offer a design and build service as well as work with existing plans. Fully insured and all works certified. Proud members of the Federation of Master Builders. 20+ 5* reviews on google. Website showcasing work and reviews. Please feel free to check it out. Thanks for reading and we look forward to the opportunity to work together on your project.
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Latest review:
Carpentry- 4 Sep 2020
Dan helped me out at short notice after being let down by another tradesman. His approach is 100 percent professional, he completed the Job as discussed on time and within in budget. He is a great guy to have around, clean and tidy and very well organised. We have already discussed future work and would thoroughly recommend him. Cheers Dan
ultra trade
Rating: 5 out of 5
Extension Builder in Avon
We are a Building/construction business and have been in the trade for 34 years. I did a five year engineering apprentiship and have passed carpentry/bricklaying/electrical/plastering etc courses over the years. We specialize in all forms of Quality domestic building work to include all internal and external construction.
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Latest review:
Extensions- 8 Feb 2026
Excellent work carried out by Graham, Ollie, Turks and the team! Ollie and the team worked hard to get the bathroom extension done with minor alterations at my request taken into account and catered for. Would highly recommend the team who were polite, courteous, worked hard and were tidy.
JM Building Services (Munford Enterprises Limited)
Rating: 5 out of 5
Extension Builder in Avon
Welcome to JM Building Services. We are a full-service building company proudly serving the Bristol area, offering everything from new builds and home extensions to refurbishments, renovations, and more. Whether you need a complete house build or just a new tap, we’ve got you covered. Our strong reputation and loyal client base speak to the quality of our craftsmanship, attention to detail, clear communication, and commitment to honesty and integrity. Our goal is simple: to deliver top-quality service at a fair price—without ever compromising on standards.
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Latest review:
Extensions- 2 Apr 2012
Would absolutely recommend JM Building Services. Very professional and excellent work. We hired JM to complete a single storey kitchen extension, and ended up not only having an extension done but also a full house render. Very pleased with the results.
Lee ward
Rating: 5 out of 5
Extension Builder in Avon
Extensions,alterations,patios,garden walls,fencing,plastering & general building high stand of workmanship with pride in my job
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Latest review:
Bricklaying- 19 Feb 2024
I am very pleased with the quality of work that Lee did at my house. Lee is clearly very experienced and knowledgeable about building work. He replaced a cracked wooden lintel above a window and a patch of ceiling which had been removed. He showed me the new lintels after they were in place and how he had stabilized the wall above it. He put up new insulation backed plasterboard and replastered the whole area. He protected the window, window sill, floor and furniture whilst the work was going on and left the room very clean and tidy afterwards. I have no hesitation in recommending Lee for building work.
rwconstruction
Rating: 5 out of 5
Extension Builder in Avon
We are a construction company with over 40 years experience, working in both domestic and commercial areas, the type of work we do are as follows- loft conversions, extensions,new builds, garage conversions, kitchens, refurb works plus any single trade jobs.As a company we can take projects from start to finish saving our customers the stress of liasing&organising different companies and individuals
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Latest review:
Extensions- 21 Aug 2022
Rob Workman IS a master craftsman. I know it says so in writing. But now that our extensive rebuild and extensions are complete, we have seen it with our own eyes as our project unfolded. Rob took our falling down, damp, mouldy, unattractive bungalow and gave us back the keys to what more than one visitor has described as a ‘Grand Designs’ and stunning modern home that meets the highest grade of eco builds. As well as working with meticulous care & always remeasuring twice ‘just to make sure’, Rob proved himself to be good at tackling the challenges & curve balls that doing up a house is always going to throw up. Our roof, and two of the walls, proved to be insubstantial to the point of dangerous. Rob worked hard to find a cost-effective solution which met the approval of the building inspector and structural engineers. As well as Rob working on site, he brought Matt and Josh who were the epitome of polite, careful workers whose own professionalism at everything from groundwork, brickwork roofing & much else besides was a pleasure to see. Other contractors who Rob brought in - such as Simon Stadden Windows - produced great quality work to complement that of the main team. We are than pleased with the work done, with the timeliness of the work, with the price, with the tidiness of the team, and above all with the gorgeous, solid house they have left behind for us. We can recommend Rob and his team unconditionally to those looking for builders.
Jack heard
Rating: 5 out of 5
Extension Builder in Avon
I’m a self employed carpenter working out of Bristol. I’ve got years of experience in a wide range of carpentry and general building from first fix working to building regulations and second fix to a high finish standard. Tv and film scenic carpenter. Festival builds.
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Latest review:
Carpentry- 14 Sep 2023
Jack boarded my loft and the work done was excellent. I found Jack punctual, polite and trustworthy. Highly recommended.
Saxon Developments
Rating: 5 out of 5
Extension Builder in Avon
We are a good friendly company we have 20 years experience theirs no job to big or to small we take on everything and all ways their to keep the customers happy
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Latest review:
Plastering- 26 Nov 2021
Wayne got one of his guys to plaster my toilet and he did a great job and was quick. I'll likely reach out again soon for some more plastering to be done. Thanks.
Daniel Sims
Rating: 4.9 out of 5
Extension Builder in Avon
At D.C projects and property management company limited we can provide all services for any project. We also do property management and property maintenance. We can also now provide remedial works for aluminium/pvcU windows, doors and glazing related issues. We have a excellent, hard working, friendly team.
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Latest review:
Windows & Doors (uPVC & Metal)- 23 Apr 2025
After a quick message in the evening they was here the next day. Was impressed by their commitment to going the extra mile. Highly recommended. Thanks
Gf construction
Rating: 5 out of 5
Extension Builder in Avon
Hello I'm Gareth the guy behind G.F.construction.I am a easy going friendly chap who loves making peoples wishes come true😊.I am a time served bricklayer but have picked up alot of skills on the way ie plastering carpentry rendering to list a few.Detail and care is what separates me from the rest in my opinion which has always kept customers coming back to me time after time.
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Latest review:
Conversions - General- 11 Nov 2025
Many thanks for your professionalism and approach to what was a small but never the less very important job for us! happy to endorse and recommend GF Construction
MW Building Services
Rating: 5 out of 5
Extension Builder in Avon
I am a builder with over 30 years of experience . A small family business offering a professional service that will take care of you and your home . All disruption will be kept to a minimum with are friendly reliable service
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Latest review:
Loft Conversion- 12 Dec 2017
Mark and Will did an amazing job. They communicate well throughout and tried their very best to not disrupt the house. Though this sort of work is major and takes a lot of time it was a pleasure to have them around. They are always cheerful and I was happy for them to have access to the house to work while I was away at work. Top job, I highly recommend them.
TP Carpentry
Rating: 5 out of 5
Extension Builder in Avon
I’m a qualified Carpenter and I specialise in loft conversions in which case I frequently carry out a wide range of carpentry and building work. I’m happy to give a rough estimate without seeing the job however I can give more detailed free quote by viewing. Me and my team are friendly, motivated and hard working and will try to ensure works are carried out in a clean and stress free manner.
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Latest review:
Extensions- 1 May 2025
Great job. Thanks. Was really quick

4.1

Top rated Extension Builders

Our Extension Builders in Avon, are rated 4.1 out of 5 based on 8 reviews from customers like you.

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What types of services are offered by local extension builders in Avon?

Building an extension is a major milestone for any home. It’s not just about adding extra space, it’s a big step that can transform how you live day to day, opening up new possibilities for comfort, lifestyle, and family needs.

This is why it’s so important to find the right extension builders in Avon for you. They can help with a variety of tasks and projects, including:

Extending your home with an extra room
Two+ storey extensions
Adding partition walls to create more rooms
Building annexes or external structures

To find the right extension builder near you, simply post your job on MyBuilder. Explain the type of help you’re looking for, and then home extension builders in Avon who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen Avon extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in Avon?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Avon will charge between £16 and £42 per hour.

Single-storey rear extensions cost between £20,000 and £60,000 depending on size and finish.
The cost of double-storey extensions, which add more space and value, can range from £100,000 to over £170,000.
Larger wrap-around extensions that combine multiple extension types can range from £40,000 to over £120,000.

The cost of an extension will vary depending on your property. For instance, extending in certain areas may require structural adjustments to ensure stability, which can increase your material and labour costs.

To get an accurate price for your home extension, request detailed quotes from several Avon extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Avon home extension project is likely to cost.

Find extension builders in Avon with MyBuilder

Hiring the right extension builder in Avon with MyBuilder couldn’t be easier. Just follow these simple steps:

Step 1: Post your extension project on MyBuilder

Whether you’re planning a single-storey extension, a loft conversion, or adding a new room, post your job on MyBuilder to find local Avon extension builders. Once your job is live, we’ll share it with home extension builders in Avon who can express their interest.

Step 2: Compare different extension builders in Avon

When you start receiving interest, review profiles of local Avon extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire Avon extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Avon, compare their experience, guarantees, and costs before choosing who to hire.

You’ll also have confidence knowing that every tradesperson on MyBuilder is verified through several checks, including:

ID verification: When a tradesperson joins MyBuilder, we ask for a valid ID, such as a passport, ID card, or eIDAS certificate.
Company verification: For tradespeople operating under a company, we make sure every tradesperson has a registered business.

Did you know? Our continuous monitoring and complaints process ensures that tradespeople who don’t meet our standards are promptly removed from MyBuilder’s platform.

Avon extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Avon extension builder before hiring?

Before hiring an extension builder in Avon or extension building company in Avon, ask a few key questions to make sure you’re choosing the right professional for your home extension project.

What qualifications and experience do you have as an extension builder in Avon?

An extension builder in Avon should have a strong track record with similar projects and relevant building qualifications or trade memberships, such as the Federation of Master Builders (FMB) or TrustMark.

Will my home extension meet all building regulations and planning requirements?

Your Avon extension builder should ensure the project complies with Building Regulations and, where necessary, handle or assist with planning permissions. Ask how they manage building control inspections and what documentation you’ll receive once the project is complete.

What experience do you have with similar extensions in Avon?

Ask to see examples of their previous work, or view examples of their work on MyBuilder. Ideally projects similar to yours in scale and design. This helps you assess the Avon extension builder’s ability to deliver a result that meets your expectations.

How long will the extension take to complete?

Extension project timelines can vary depending on size, complexity, and weather. A typical single-storey extension might take around 8 - 12 weeks. Request a detailed schedule so you know what to expect and when key milestones will be reached.

Do you offer a guarantee for your work? Most Avon extension builders offer a guarantee or warranty on their work, often between 1 and 10 years depending on the project and materials used. This gives you assurance that any issues will be resolved after completion.

If you still have questions about the professional you are looking to hire, we have a full detailed guide on hiring the right builder here.

FAQ: Common questions about home extensions in Avon

Can an extension builder in Avon help with planning permission?

Yes, many extension builders in Avon can guide you through the planning process. They can help prepare drawings, advise on local requirements, and liaise with your local council to ensure your project meets all necessary regulations.

Can an extension builder in Avon handle everything from design to construction?

Many Avon extension builders offer full design-and-build services, managing both the architectural planning and construction stages. Ask your builder whether they can provide a complete package or if you’ll need to hire an architect or designer separately.

Will an extension builder in Avon help with materials and finishes?

Yes, most extension builders in Avon can source materials and offer advice on finishes that suit your design and budget. You can also choose to supply certain materials yourself, just make sure this is agreed upon before work starts.