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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JBS Brickwork
Rating: 5 out of 5
Extension Builder in Alton
We currently have a lead time of 7 weeks Please bear in mind when expressing interest JBS Brickwork & Construction is a fully insured brickwork and landscaping contractor based in Chichester, West Sussex. We take on everything from small repairs to large-scale projects — and we do every job properly. Backed by over 40 years of construction experience, our team combines traditional workmanship with a reliable, professional approach to modern building projects. Whether you need a garden wall rebuilt, a patio laid, or specialist flint work carried out, you'll get the same honest advice, fair pricing and quality finish every time. We also undertake insurance work. No job is too small. No project is too big. Just straight-talking, reliable tradespeople who take pride in their work.
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Latest review:
Groundwork & Foundations- 19 Aug 2026
JBS (Joe) responded to my job for the removal of an old concrete base and laying a deeper more solid one to support a heavy-duty steel shed. Joe arrived at the appointed time to assess the work and quote accordingly. It was very clear that he understood what was required a quote given which was concise. A date was agreed when the work would commence. On the allotted day and at the time agreed Joe turned up despite inclement weather and knuckled down to excavate the site then complete a new concrete base with his team… a truly family affair. The end result is right on the money, all done effortlessly the site left clean and tidy. A job well done we are happy with the result and as a result have another job lined up shortly. We would highly recommend JBS from our experience thank you.
Beyond Bricklaying Ltd
No reviews yet
Extension Builder in Alton
We are a local family run company with over 20 years experience in multiple new builds, commercial work, extensions, garden walls and re pointing. We pride ourselves on quality and customer satisfaction with references if required.
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Norval building
No reviews yet
Extension Builder in Alton
All aspects of work undertaken
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Woodfellas construction projects Ltd
No reviews yet
Extension Builder in Alton
Hi we are qualified and professional tradesmen with 25 years experience,We undertake all aspects of carpentry and building including kitchens, renovations, extensions, loft conversions and garage conversions.
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KAMIL THE BUILDER LTD
Rating: 5 out of 5
Extension Builder in Alton
I have a 20 years of experience as a builder. I take my work very seriously. High quality Service at a sensible price! - gas and heating services -plumbing services-bathroom and kitchen refurbishment-interior and exterior renovations and lots of more...
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Latest review:
Bathroom Fitting- 23 Jan 2023
Really excellent work from Kamil and his team. Beautiful quality en-suite bathroom installation completed on time and to the quote. Clean, tidy and great communication including during the job as things progressed. Already recommended to my in-laws and looking forward to having future bathrooms done by Kamil. Expert and knowledgeable. Easy to get on with and a pleasure to have in the house.
Knight bricklaying
No reviews yet
Extension Builder in Alton
From new builds/garages/extensions/walls/piers/patios. Fast efficient and always a tidy job.
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Kelsea construction ltd
No reviews yet
Extension Builder in Alton
I’ve been running Kelsea Construction since 2019, I am an experienced bricklayer with 8 years behind me. We are a passionate, hard working and forward thinking team. We can cover all aspects of the building world, from landscaping, extensions, new builds etc, no job too big or small. Kelsea Construction specialises in brickwork.
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Mason Bricklaying Ltd
Rating: 5 out of 5
Extension Builder in Alton
Dedicated brickwork contractor providing quality construction services across the south coast. Building Dreams Into Reality !
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Latest review:
Bricklaying- 17 Apr 2024
Dan replaced our old wooden porch with a brick / UPVC one. His quote was competitive and we are very happy with the end result. Dan was punctual, hardworking, reliable and tidy. We would not hesitate to use again and / or recommend to others.
Ajito Design + Build Ltd.
No reviews yet
Extension Builder in Alton
We are a team of experienced and talented kitchen fitters, carpenters and joiners based in Petersfield, Hampshire with over 10 years of fully qualified experience. Offering a bespoke, friendly and professional service in respect of both Residential and Commercial Carpentry including kitchen fitting & design and 1st & 2nd fix carpentry work. We bring a vast amount of experience and workmanship our projects and work on a wide range of both commercial and residential projects.
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Sukh
Rating: 4 out of 5
Extension Builder in Alton
Welcome to Shark Design & Build, your trusted partner for all your construction Specialising in a range of services including extension building, loft conversions, bathroom fitting, renovations, and carpentry, we are committed to transforming your living spaces into something extraordinary. Located in the heart of St Denys, Shark Design & Build has established a reputation for excellence in the Hampshire region. Our team of skilled professionals is dedicated to delivering high-quality craftsmanship and exceptional customer service. Whether you're looking to expand your home with a seamless extension or transform your attic into a functional loft space, we've got you covered. Our extension builders are experts in creating additional space that blends perfectly with your existing structure. We understand that every home is unique, and we work closely with you to ensure that your new extension meets your specific needs and style preferences. From initial design to final construction, we handle every aspect of the project with precision and care. Thinking about a loft conversion? Our team can help you unlock the potential of your unused attic space. Loft conversions are a fantastic way to add value to your home and provide you with the extra room you need, whether it's for a new bedroom, office, or playroom. We ensure that every conversion is completed to the highest standards, with minimal disruption to your daily life. At Shark Design & Build, our bathroom fitters are passionate about creating beautiful and functional bathrooms. Whether you're dreaming of a modern spa-like retreat or a classic, timeless design, we have the expertise to bring your vision to life. Our team will guide you through the entire process, from selecting the perfect fixtures to the final installation. Renovations are another area where we excel. If you're looking to breathe new life into your home, our renovation services can help you achieve just that. We take pride in our ability to revitalise spaces, ensuring that they reflect your personal style and meet your practical needs. Our carpenters are skilled artisans who bring a wealth of experience to every project. From custom cabinetry to bespoke furniture, our carpentry services are designed to enhance the beauty and functionality of your home. We use only the finest materials to ensure that every piece we create is both durable and aesthetically pleasing. Choose Shark Design & Build for your next project Our commitment to quality and customer satisfaction sets us apart. Let us help you create the home of your dreams with our comprehensive range of services. Contact us today to discuss your project and discover how we can make your vision a reality.
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Latest review:
Joinery & Cabinet Making- 1 Aug 2025
Very efficient and quick installation of wardrobes in 2 bedrooms. Good job by the fitters
King Construction
Rating: 5 out of 5
Extension Builder in Alton
Hi, my name is Jack, I have been a qualified bricklayer for 5 years, and been in the construction industry for 8 years, learning all different types of trades along the way! I take pride in my work and work hard to strive for perfection!
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Latest review:
Conversions - General- 3 Feb 2024
the builder was very polite and helpful he quoted a fair price for doing the job he turned up on time and he did a very neat job and cleared up and removed all the rubble we are very pleased with the workmanship and would use him again
LJR Construction
No reviews yet
Extension Builder in Alton
LJR Construction -Building Contractor operating for over 20 years, specialising in Extensions but have the team to undertake all aspects of building from minor plumbing works, re-pointing to full on House Builds. We pride ourselves on Quality and cleanliness.
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Kr construction and landscaping
New on MyBuilder
Extension Builder in Alton
Hi there I’m Kev have over 20 years experience in all aspects of building from digging footing to handing keys to a new house or adding a extension to the property from basements to roofs or transforming your garden I’ve been and seen a huge variety of works over the years and some challenging I’m kind friendly and will go out my way to help wherever I can while providing a high quality of service and reassurance that the job gets done right Thanks for reading
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Mr Developments
Rating: 5 out of 5
Extension Builder in Alton
General building contractor Time served plastering and bricklayer, with over 30 years experience on own contracts Specialises in extensions and renovations, have carried out contracts in past to value of 250k on total renovations Well experienced in all ground works
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Latest review:
Extensions- 27 Jun 2019
Mike built our extension (20m sq approx.) which involved rerouting a number of waste, soil & rainwater pipes, blocking up an existing window, fitting two new windows, sliding doors and roof lantern and laying a new patio area. He started and finished the work on time and readily coped with adjustments we made to the plans. My wife and I are very pleased with the results. Mike is a willing and able worker with an easy going, genial nature who wants to do a good job. We've asked him to quote for some addition work and I'm happy to recommend him.
Stag Hill Carpentry Ltd
No reviews yet
Extension Builder in Alton
We are a family business, we undertake all aspects of carpentry, joinery and small building works. We have three carpenters/joiners and me the director another carpenter/joiner with heaps of experience. We normally build roofs, staircases, built in storage, bespoke joinery, front doors, sash windows, flooring and much more.
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Mactar Construction
Rating: 5 out of 5
Extension Builder in Alton
Our friendly, experienced team have more than a decade of experience in the industry and we are known for our high standards, fair prices and attention to detail. We are fully insured and only employ the most reliable local tradesman. We always strive to complete the job within your budget and time frame
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Latest review:
Extensions- 15 Jun 2026
We hired Mac to complete a single storey extension which involved digging foundations, removing internal walls and installing a number of RSJs. Mac completed all of the work ahead of the tight schedule that we asked for as we had our first baby in the way. His workmanship was high quality throughout the project, he was dedicated and did not have multiple jobs on the go at once unlike other builders. we couldn’t be happier with the result and would hire Mac again for any future work. Mac was very friendly and approachable through the project and always had time to listen to our requests and even gave me some tips on other DIY projected had going simultaneously! I have no negative words to say about him.

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.