Extension builders in Alton

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.7 (10 reviews)

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Some of our top rated extension builders in Alton

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Brickie
Rating: 5 out of 5
Extension Builder in Alton
Hello I’m Vitor founder of Hennessy Construction. We are an experienced,approachable team of skilled builders delivering high-quality workmanship across the industry. Our specialist services include: .EXTENSIONS .NEW BUILDS .REPOINTING PROJECTS .STRUCTURAL REPAIRS .RENOVATIONS .SUBSIDENCE We adhere to all building regulations,deliver reliable results and keep communication open and honest-whatever the size of your project. We have full public liability insurance.
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Latest review:
Repointing- 10 Oct 2026
A great professional job. Everything was kept clean and tidy. Vitor is a very nice and polite worker. Would use again.
Weplumbheat
Rating: 5 out of 5
Extension Builder in Alton
We are local and independent family-run business with many years of experience in plumbing and heating and complete house refurbishment and renovations. So, whether you need to replace a dripping tap or a leaking pipe, kitchen appliance installations or a complete house refurbishment, we can help. We specialise in managing the whole project. Our engineers are highly trained and fully qualified. They are Gas Safe Certified. No jobs too small or too big and we take pride in our work.
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Latest review:
Bathroom Fitting- 25 Mar 2026
Sujit and his team are experienced & professional. Work was completed to a high standard, and was very tidy & clean. Polite, respectful and accommodating. Sujit gave good advice and was supportive in the choices/suggestions that I made. I am extremely happy with my bathroom & have had numerous compliments. Highly recommended
Mushroom Building Services
Rating: 5 out of 5
Extension Builder in Alton
We are a small building company with over 30 years experience based in Farnham. We offer a full building service from start to finish. We complete all work to the highest standard, no exceptions. We’re fully insured and qualified.
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Latest review:
Conversions - General- 29 Sep 2022
The job - gutting our living room. Tearing down the ceiling, removing all old wallpaper and ripping up the floor in order to insulate and add lighting. While we were doing this, we decided to replace the main steel in the living room (which was oversize and impacted the floor height in the guest room) and do remedial works in the guest room. The steel replacement was not time budgeted, but Oli and Tony didn’t hesitate to quote,To make time for us and bring in the structural engineer. Probably added 3 weeks to their time on site. The trades they brought in (plumbing for heating, electrician for downlighters, structural engineer and plasterers) were all professional, did an excellent job and were all unfailingly polite. It was easy to build a good, positive relationship with them, to the point we felt comfortable giving them the keys to the house so they could work while we went away for two weeks. They sent photos of their progress and showed up and worked as if we were there. I was very impressed by the state of the house when we got back. They watered our plants (I didn’t ask) and they cleaned the hallway so that it was spotless. They did a good job for a fair price, and were always cheerful and open to conversation. They came back to do a few snagging items without being chased (this is a huge thing for me, after having chased many builders to finish bits and pieces). I would definitely use them again.
Legacy Home Contractors ltd
Rating: 5 out of 5
Extension Builder in Alton
Legacy Homes Ltd is a Hampshire-based building company specialising in high-quality domestic and commercial construction. We deliver reliable, well-managed projects with a strong focus on craftsmanship, integrity, and long-term value.
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Latest review:
Work was completed efficiently and effectively. Excellent craftsmanship, professional approach and minimal intrusion on the rest of the house. Would definitely recommend and employ again.
Precision building & maintenance
Rating: 5 out of 5
Extension Builder in Alton
Builder specialising in brickwork
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Latest review:
Bricklaying- 4 Aug 2020
Top job, efficient and tidy. Would definitely recommend! Thanks Luke.
Thames brickwork
Rating: 5 out of 5
Extension Builder in Alton
Hi I’m Dan, I’m a level 3 qualified bricklayer who has been in construction for over 20 years. I work with my dad who had been a bricklayer for over 40 years. We pride ourselves on being honest and upfront with customers. We have a lot of pride in our work and complete jobs to a high standard.
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Latest review:
Dan carried out the block work for our single storey rear extension. He was reliable and easy to talk to. Helping us through the whole process of the extension and putting us in contact with other tradespeople. He has a great attention to detail and is very thorough in his workmanship. Would recommend him to friends and family.
Dermot Grieve
Rating: 5 out of 5
Extension Builder in Alton
I’m a bricklayer with 35 years experience from refurbishment to new builds . Dig foundation pour concrete and build sub structur, Lay floor and build super structure to wall plate
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Latest review:
Repointing- 8 Oct 2026
Dermot arrived in good time everyday, worked efficiently and left the site clean and tidy. He's a lovely chap and I'm very pleased with his work. I'd definitely recommend him.
Lime green homes
Rating: 5 out of 5
Extension Builder in Alton
Our work starts in the ground, prepping groundwork and foundations, then undertake all work in the building trade to construct a new home. We also do extensions, renovations, conversions, and everything associated with these works
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Latest review:
Bricklaying- 7 Feb 2023
Tom was absolutely fantastic- he did the job at hand to a high standard and also took on some extra work which I was also very happy with. A really nice, friendly guy who’s always happy to give his expert advice- I highly recommended his services
Collyer Construction Ltd
Rating: 5 out of 5
Extension Builder in Alton
Collyer Construction Ltd are a building contractor based in Fleet, Hampshire and covering areas such as Hook, Farnham, Guildford, Basingstoke and Woking. Professionally managed by the director Chris Collyer who has more than 30 years experience in the construction industry. Our projects typically involve large scale renovations, two storey extensions and new builds. We offer a fully project managed solution, we can advise on architects and can liaise directly with clients or developers.
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Latest review:
Two storey side and rear extension to create large Kitchen/Dining/Family Room, New, Garage, Hot Water and Heating System, Ensuite, Spare Bedroom and Family Bathroom. As first-timers to a house extension project, we’ve been delighted with Collyer Construction. Chris was customer-focused, calm and reassuring throughout and we felt that he always considered the build from our perspective. The site was kept tidy and secure, our neighbours were considered at all times and his team were a pleasure to have around. Most importantly, the build quality and finish was superb and we were on time and to budget. We have no hesitation in recommending them, and have done several times already!
J.P.R Drylining
Rating: 5 out of 5
Extension Builder in Alton
Hi I'm Josh of JPR Drylining LTD Myself & my team pride ourselves on working to the highest standard whilst being clean and tidy and providing our services at a competitive rate. Please see my company description below to understand what services we provide. Thanks
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Latest review:
Plastering- 7 Feb 2020
Excellent job finished to a very high standard, wouldn't hesitate to recommend Joshua and his team.
K7 Renovations
Rating: 5 out of 5
Extension Builder in Alton
At K7 we pride ourselves on our attention to detail. We only use quality tradesman. Our aim is to give our clients the dream house they have been looking for. We at K7 we undertake extension, loft conversions, garage conversions,bathroom/ kitchen renovations and full house refurbishments.
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Latest review:
Kevin from K7 renovations has done 2 jobs for me in the last few years, the first being an annex in my garden, the second was a full extension with high vaulted ceilings. Both jobs ran smoothly from the time I handed him my architects drawings. The things that stood out for me were Kevin's knowledge and understanding of what I required, the timekeeping of everyone on site and last but not least the site was left tidy at the end of every day. I would highly recommend K7 to anyone. I would be happy to share photos of these projects with anyone.
S.K building services
Rating: 5 out of 5
Extension Builder in Alton
I am a sole trader with qualifications in bricklaying. I have experience in all types of brickwork and ground work such as patios, driveways, drainage, foundations and conservatory bases.
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Latest review:
Extensions- 9 Feb 2026
Firstly I would like to thank Scott and his team for their hard word completing our Porch build on schedule despite the cold and very wet weather throughout January. Scott is excellent at his job ( ground works and bricklaying ) and knows when he needs to bring in other trades to complete the project. Always on site when he said as with the other trades he booked. He kept me up to date throughout the build. We are very pleased with our new Porch and impressed with S.K Building Services work ethic and would highly recommend given them a chance to quote your building project. I will definitely use them again for any future projects at home or garden . Once again thanks Scott and team from a very happy customer - IAN & GINI -
Savage Brothers Building Services Ltd
Rating: 5 out of 5
Extension Builder in Alton
As a company we like to have a clean and tidy site and this reflects in our work. We enjoy building extensions and our customers are always pleased with the work and the respect we show. We love being on site from start to finish to see all the work carried out and keep it to a high standard.
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Latest review:
Savage Bros built me a single storey extension on the back of house with pitched roof, four velux windows in a vaulted ceiling, they fitted a new cream gloss kitchen with black granite worktops and turned my old kitchen into a new dining room. Richard also installed a new bathroom suite and downstairs toilet and finished by tiling and painting the rooms. Richard takes great pride in his work and he has great attention to detail, I cannot fault anything. He comes in early and works solidly all day, cleaning up at the end of each day. A true professional in all aspects of the job. We would recommend him, he is a lovely genuine man.
TP Plastering Contractors Ltd
Rating: 5 out of 5
Extension Builder in Alton
Here at TP Plastering Contractors Ltd we specialise in all aspects of plastering, all aspects of rendering, drylining, insulation floor screed and decorating. Under our sister company TP Developments we also cover all aspects of home refurbishment/conversion and improvement work from start to finish. We strive to go the extra mile with all of our clients to make sure every job exceeds expectation and make a house a home to be proud of. Over the years we have worked with private clients, builders, architects, landlords and property developers. The devil is in the detail. We look forward to working with you.
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Latest review:
Conversions - General- 23 Sep 2026
Tao was brilliant gave us all the information we needed.
DAN Z GENERAL BUILDING LIMITED
No reviews yet
Extension Builder in Alton
I'm a Polish builder with 16 years experience. From 2008 I worked for English contractors, usually I take all kinds of builder jobs, I have two guys who work with me, If you want see some of the jobs that I have done then contact me please.
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Kady Brickwork & Construction
Rating: 4.5 out of 5
Extension Builder in Alton
Hi there, We take on all types of building, alteration and landscaping work from small repointing jobs or changing locks to to large extensions and garden redevelopment. I'm a fully qualified bricklayer and carpenter with 25 years experience and an extensive list of trusted and vetted tradesmen We use regularly to provide professional quality to all our work. We are proud to say Most of our work is obtained though word of mouth and would be happy to provide further references if required.
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Latest review:
Extensions- 5 Nov 2020
Had wood delivered. Did not turn up to start the job. I tried calling and it sounded like he was asleep. Would not take any further calls. I asked for wood to be collected as he is unreliable but it is still here.

4.7

Top rated Extension Builders

Our Extension Builders in Alton, are rated 4.7 out of 5 based on 10 reviews from customers like you.

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

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 Alton 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 Alton who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Alton?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Alton 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 Alton extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Alton home extension project is likely to cost.

Find extension builders in Alton with MyBuilder

Hiring the right extension builder in Alton 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 Alton extension builders. Once your job is live, we’ll share it with home extension builders in Alton who can express their interest.

Step 2: Compare different extension builders in Alton

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

Step 3: Hire Alton extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Alton, 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.

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

What to ask a Alton extension builder before hiring?

Before hiring an extension builder in Alton or extension building company in Alton, 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 Alton?

An extension builder in Alton 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 Alton 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 Alton?

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 Alton 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 Alton 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 Alton

Can an extension builder in Alton help with planning permission?

Yes, many extension builders in Alton 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 Alton handle everything from design to construction?

Many Alton 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 Alton help with materials and finishes?

Yes, most extension builders in Alton 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.