Extension Builders in Southampton

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.4 (5 reviews)

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Some of our top rated extension builders in Southampton

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Project Casa Ltd
No reviews yet
Extension Builder in Southampton
We are a building and development company focussing on extensions, renovations and new builds. We look forward to discussing your project.
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Muscat Carpentry & Construction
No reviews yet
Extension Builder in Southampton
Muscat Carpentry & Construction is a Hampshire-based building and renovation business specialising in home extensions, refurbishments, and bespoke carpentry work. We provide high-quality craftsmanship, reliable service, and attention to detail on every project — from structural construction to fine interior finishes. Our goal is to help homeowners transform their living spaces with professional, efficient, and trustworthy building solutions. We pride ourselves on delivering excellent results that combine traditional skill with modern design, ensuring each project is completed to the highest standard. With a strong focus on customer satisfaction, clear communication, and clean workmanship, Muscat Carpentry & Construction is dedicated to building long-term relationships and lasting homes across the South of England.
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Phoenix construction
No reviews yet
Extension Builder in Southampton
Welcome to Pheonix Construction With over 30 years of building experience, we are your trusted experts for all your construction needs. From extensions and new builds to beautiful landscaping, we cover every aspect of the building trade. Our comprehensive services include: •Full builds from digging out to shell construction to roof structure •Expert extensions and renovations •Professional brick laying •Stunning landscaping •Supply and fit of air conditioning systems At Pheonix Construction, quality and customer satisfaction are our top priorities. Whether you're planning a major construction project or a small extension, our skilled team is here to make your vision a reality. Contact us today to discuss your next project!
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Boxall Building Services
Rating: 5 out of 5
Extension Builder in Southampton
I have been in the building industry from 1983 when I started as a roof tiller. Over the years I have progressed to a multitrade builder tackling new builds, extension's, loft conversions and all other aspects of construction.
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Latest review:
We have hired Andrew to do quite a lot of work for us including replacing our conservatory and work on the exterior walls of our house. He is great, he is really friendly. I believe him to be completely trustworthy, after he had worked for us the first time I was more than happy to leave him with a house key when I went out. Andrew has always called us shortly after he has finished jobs to confirm that we are happy. I highly recommend him and give him 10 out of 10!
hb builders
No reviews yet
Extension Builder in Southampton
We are a family run business of two brothers working together with over 40 years experience in the building trade. We specialize in extensions bricklaying and plastering but are also able carry out a range of different jobs and would be more than happy to come and give you advice and a free quotation.
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Jps Builders Southern Limited
No reviews yet
Extension Builder in Southampton
JPS Builders are hard working, skilful builders. Vastly experienced in all aspects of building work. Covering everything from new builds, traditional oak frame work, renovations of listed buildings and extensions of all shapes and sizes. Based in Hampshire, we cover the south of England.
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J Squibb Carpentry and building
No reviews yet
Extension Builder in Southampton
Hi, I’m Jake and I’m a sole trader carpenter and can offer services in all aspects of carpentry and building work, ranging from property renovations to door installations, panelling, kitchens, decking and much more.
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TENON JOINERY SERVICES LIMITED
No reviews yet
Extension Builder in Southampton
Dear Customer We are an established Complete Building Contractor with a Specialist Joinery Workshop. We carry out all elements of building, from design, construction, electrical and Plumbing, fit out and decoration. New build and Refurbishment work.
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ND Builders
No reviews yet
Extension Builder in Southampton
We have been carrying out general building, extensions, alterations and renovations for over 30 years
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Bury hall home improvements
No reviews yet
Extension Builder in Southampton
General builder Hi my name is Mark, I have over thirty years experience in the building trade, we have carried out numerous building projects, from small patios to two storey extensions, we are a friendly professional team that will help you fulfill your project, to your expectations
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CGMT Carpentry & Build
No reviews yet
Extension Builder in Southampton
At CGMT Carpentry and Build, we take pride in turning ideas into reality. From custom carpentry to full property renovations, we provide a dependable, friendly service with attention to detail at every stage. Our goal is simple: quality work, honest communication, and results you’ll be proud of.
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KinleyPaving
No reviews yet
Extension Builder in Southampton
Reliable, Skilled, and Ready to Transform Your Outdoor Space With years of hands-on experience, I provide top-quality groundworks and landscaping services tailored to your needs. I take pride in every job, big or small, and deliver clean, durable results that stand the test of time. Services offered: • Bricklaying • Fencing • Timber & Composite Decking • Steel Work • Drainage Solutions • Block Paving • Resin Driveways • Patios • Artificial Lawns • Tarmac • Raised Flower Beds • Concreting • All Groundworks Whether you’re looking to improve your garden, upgrade your driveway, or need expert foundations laid, I offer reliable, tidy, and affordable solutions. I work closely with each customer to bring their vision to life and never cut corners on quality. Get in touch today for a no-obligation quote—let’s build something solid together.
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Tsw family builders
No reviews yet
Extension Builder in Southampton
When it comes to home improvement projects such as extensions and refurbishments, finding the right builders can make all the difference. Tsw family builders offer a unique blend of professionalism, expertise, and a personal touch that other large-scale construction companies may lack. With our commitment to quality craftsmanship and customer satisfaction, we have become a trusted choice for homeowners looking to transform their properties.
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Bogue Construction
Rating: 5 out of 5
Extension Builder in Southampton
At Bogue Construction our goal is not only to help design and build your new home but to make the process easy and enjoyable for you. We can help with all phases of your project from planning to completion. We are confident that you wont be disappointed choosing us for your project.
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Latest review:
Extensions- 9 Jul 2025
Patrick is polite, punctual, courteous and very hard working. He works to a very high standard and is skilled and very experienced in constructing house extensions. We are so pleased with how our conservatory conversion to a single-storey extension is progressing. We are so looking forward to the finished product. Thank you so much Patrick. We would highly recommend Bogue Construction.
Bricks&MortarBros
No reviews yet
Extension Builder in Southampton
🧱 Bricks & Mortar Bros 🧱 Small Business And Growing 🏆Building trust, Constructing quality 📍 Serving The South Coast
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Mark hutchings
No reviews yet
Extension Builder in Southampton
I am an honest, reliable builder, with 16+ years experience in all aspects of construction work Inside and outside.
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4.4

Top rated Extension Builders

Our Extension Builders in Southampton, are rated 4.4 out of 5 based on 5 reviews from customers like you.

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Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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

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

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

What are the hourly rates of extension builders in Southampton?

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

Find extension builders in Southampton with MyBuilder

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

Step 2: Compare different extension builders in Southampton

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

Step 3: Hire Southampton extension builders with confidence

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

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

What to ask a Southampton extension builder before hiring?

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

An extension builder in Southampton 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 Southampton 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 Southampton?

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 Southampton 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 Southampton 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 Southampton

Can an extension builder in Southampton help with planning permission?

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

Many Southampton 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 Southampton help with materials and finishes?

Yes, most extension builders in Southampton 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.