Extension Builders in Southampton

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.5 (6 reviews)

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Some of our top rated extension builders in Southampton

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Evermore Building
Rating: 5 out of 5
Extension Builder in Southampton
We are a family run building and property maintenance company with a combined experience of over 50 years in the industry. We are happy to quote on the smallest jobs that may only take an hour or two right up to full house refurbishments and extensions. From our own experience we know the small jobs often lead to bigger projects, once a client has seen the quality of our workmanship and experienced the open and transparent way we offer quotations and carry out the work this often leads on to bigger projects and recommendations.
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Latest review:
Kitchen Fitting- 15 Nov 2025
Kitchen Island installed to plan. Looks amazing and they did a fantastic job, cleaned up and left everything clean and removed all the rubbish. Definitely recommend them.
MS building
Rating: 5 out of 5
Extension Builder in Southampton
Hi my name is Mark I have been in the building trade for over 10 years all building work undertaken Groundworks,Drainage,Drives, Patios,Brickwalls/Extensions, Fencing,Exterior Painting,UPVC fascias and guttering,small carpentry works Please give us a call for a free quotation kind regards Mark
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Latest review:
Fascias & Soffits- 28 Apr 2020
Mark was great, he came straight out when we had a leaking roof, his work was professional and he always kept us up to date with what was happening. He fixed the leak and went above and beyond for us. Highly recommend and we will definitely be using him again!
MMMB Construction LTD
Rating: 4.8 out of 5
Extension Builder in Southampton
Triple MB Construction LTD stands as a beacon of innovation and excellence in the construction industry throughout the United Kingdom. With a steadfast commitment to quality craftsmanship, impeccable project management, and client satisfaction, Triple MB has emerged as a distinguished player in the realm of construction services.
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Latest review:
Loft Conversion- 21 Sep 2024
First of all, Manuel, Mike and the team are life savers. They took on our small but rather complex loft conversion after we were badly let down by the previous builders. The job involved the replacement of the whole roof structure including the installation of steel beams, adding Velux roof lights, an ensuite bathroom, electrics, plumbing, skimming and decorating plus installing a whole new staircase. Despite various challenges the team stayed positive throughout and always managed to find a solution. We did have limited space and lived and worked onsite alongside the works which was not an easy undertaking. Manuel and his team managed to get the job completed to our satisfaction and we are very happy with the results. Naturally, with a complex project like this there is always room for improvement in terms of planning and communication and working efficiently with the various trades. Ultimately, if you're looking for reliable and outcome-focused builders we can only recommend MMMB.
G.M.P Contractors Limited
Rating: 4.7 out of 5
Extension Builder in Southampton
I am George Parnavel. I run a small, family business with over seven years’ experience in the construction industry, serving Southampton and the surrounding areas. I handle groundwork, landscaping, paving, foundations, and drainage. As a CPCS Skilled Excavator Operator since 2019, I take pride in delivering precise, reliable work to a high standard.
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Latest review:
Demolition- 30 Jan 2026
All good and nice tidy job with a nice, can do attitude. Recommended by The LR Group.
Jamie
Rating: 5 out of 5
Extension Builder in Southampton
Recently started out on my own leaving a job of 10 years to work for myself . Have a small team doing all types of jobs from tiling / bathroom installation Fencing ,decking ,gutter cleaning / small plumbing jobs , Plastering , laminate flooring and more ! Been in the industry for 12 years , friendly and easy to work with
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Latest review:
Bathroom Fitting- 20 May 2024
Jamie and Steve were great. Any issues were overcome- caring attitude to all parts of the job and totally trustworthy. Clear invoicing after a great finish to the job. I am going to use them again when they are available
AA2 Architecture
Rating: 5 out of 5
Extension Builder in Southampton
In our Design & Build company, our experienced and knowledgable design team can help you fashion your build from start to finish, giving you a relaxed and enjoyable building process. One single point of contact from the design concept to planning to build completion.
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Latest review:
Architecture- 3 Nov 2019
Very pleased with his plans drawn explained to me took his professional judgement and know how and plans approved in first instance without any problem definitely recommend him and will always use him for future planning Aswell. Job well done.
Nath's Brickwork
Rating: 4.5 out of 5
Extension Builder in Southampton
15+ years experience in all aspects of brickwork, walls, conservatories, extensions, patios, repointing, painting and decorating all work undertaken and completed by qualified and competent professional tradesmen and tradeswomen
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Latest review:
Painting & Decorating- 29 Apr 2025
Nathan, Daisy, and Dan renovated and redecorated the front of my neglected Edwardian detatched house. Nathan replied to all my posts on Mybuilder.com immediately. He visited the property at the agreed time, and gave a thorough and detailed analysis of extra problems I had not forseen. He emailed a very reasonable quote the same day. The team started work within a week after I accepted the quote. They worked unobtrusively, doing a thorough job, explaining at the end of each day what had been done, and explaining the next stage. I would recommend them.
Staunch Developments Ltd
Rating: 5 out of 5
Extension Builder in Southampton
DNN Developments Ltd is a construction company who undertake any building jobs, ranging from ground works, landscaping and brickwork to extensions and complete renovations. We have years of experience and can get the jobs done from start to finish.
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Latest review:
Extensions- 1 Apr 2021
Very pleased with our porch - built to high standards. Zak worked hard and took pride in the job.
3 Futures ltd
Rating: 5 out of 5
Extension Builder in Southampton
We are a full turn key Construction company that offers Mechanical, Electrical & all Construction services, from a small repair to a major refurbishment or new build project. We pride ourselves in our ability to take an idea through to a completed reality, all this is achieved through our knowledgeable and expert team. We also hold accreditations such as CHAS and NICEIC
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Latest review:
Conversions - General- 22 May 2022
Terry and his team were great, work completed within time scale and accommodated changes we asked for. The finished work is exactly what we wanted. He kept us fully informed throughout and we’ll use him again when we’re ready for our next project. Would recommend.
PBcarpentry
Rating: 4.9 out of 5
Extension Builder in Southampton
7/7/09 Recently finished constructing 24 Arched box sashed windows.For a refurb At Oakly Hall Basingstoke. 01/10/09 Worked for various small builders from new builds to refurbs.16/03/09 working forman for a carpentry company on 3 sites, over looking 32 carpenters.I like to accomidate the customer with there requests and forfilling there desirers. I am qualified to draw on request work that the customer desires
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Latest review:
Extensions- 15 Mar 2022
Never ever, doubling outbuilding 2x2.7m so 2 time 2 meter single brick wall and one 2.7m with a door. Took over 2 months, winge all the way through trying to get more money over his quote. Brick binding not completed so after finished job, with first rain we have got a pool inside which caused damage. Roof felt was patchy and just couple of months start leaking so need to be done again. Informed him, no reply. So I have to do it again. Not recommending him at all. Paid cash in advance which was a mistake. Good speaker but not a good builder, contractor. Don't fall for him.
BCK BUILDERS
Rating: 5 out of 5
Extension Builder in Southampton
Professional Builder who strives only for the highest of standards. Work always completed to help the customer achieve their goal. All works undertaken, including: Repairs, Garden Walls, Extensions and New Builds. Builders public liability insurance £2,000,000.00 available on request.
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Latest review:
Extensions- 13 Sep 2022
Quick, polite and tidy company. Was a pleasure to use them and will consider them again in future. Ben was happy to discuss the job beforehand, then talk through any unforeseen aspects they came across during our renovation. Price was as quoted.
Brendon Green Mansions Ltd
Rating: 5 out of 5
Extension Builder in Southampton
Brendon Green Mansions Ltd are a fast, professional, reliable and experienced team of builders and building contractors. What ever your requirements, we can offer you the flexibility and experience to undertake large or small projects. All our projects are completed to ensure compliance with current building regulations.
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Latest review:
Extensions- 16 Dec 2019
Mark and his brother were faultless. Kept informed throughout. At no point were we left wondering 'what next?' Consulted with us throughout. Will be using for our next project in the new year. Very competitive prices. Very pleased with porch.
D & T Brickwork
Rating: 5 out of 5
Extension Builder in Southampton
Hello we are D & T Brickwork Ltd we pride ourselves on our top quality work and a very hard work ethic. We have been in the industry for 15+ years Each giving us a combined 30+ years building work experience. We insist on being as honest, open and clear with our clients as we can and it’s stood us in good stead up to now. Please have a browse through our profile and images. Hope you like what you see and look forward to hearing from you
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Latest review:
A boundary wall and fence alongside an inclined pavement was demolished by Storm Eunice. Something far more substantial was required to replace it. D&T Brickwork produced an unbelievable result, better than expected! After discussions with Dean and Tucker, emphasizing what we were seeking as a replacement, these guys provided an honestly priced quote, manually removed tons of spoil and very carefully planned and accurately delivered a phenomenal new retaining wall. They worked diligently throughout, provided plenty of helpful ideas, were polite and friendly and they have a superb work ethic. The quality of the work was exceptional and not rushed. Should we ever need additional works we will not hesitate to call upon the services of D & T Builders once again. Highly, highly recommended!
J.Allen Brickwork & Construction
Rating: 5 out of 5
Extension Builder in Southampton
A friendly and reliable company based in Hampshire specialising in all brickwork and construction aspects from extensions, garden walls, patios and everything in between! With 7 years experience in bricklaying and general building work we bring fresh and new ideas to the trade. We look forward to hearing from you soon!
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Latest review:
Repointing- 16 Jan 2023
Absolutely top notch service, turned up when he said he would gave honest quote and did a great job will definitely use again
Marcin Zuchowicz
Rating: 4.5 out of 5
Extension Builder in Southampton
I am a bricklayer/bathroom fitter/plumber and have been doing the above jobs for the last 20 years. I will decorate, fit bathrooms, kitchens and undertake most other jobs in the decorating business. I pride myself in being a perfectionist when it comes to work. I have many photos of jobs I have done and would be happy to provide these as proof of what I can do and the high standard of everything I undertake.
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Latest review:
Bathroom Fitting- 24 Jul 2021
Great work on the bathroom. On time and on budget
Binstead Carpentry & Building
Rating: 4.7 out of 5
Extension Builder in Southampton
I am small business,which can give competitive prices.I have fully qualified sub-contractors tradesmen and offer a full multi trade service. Our experience and expertise range from hanging doors to big extensions I’m also a B&Q approved kitchen installer.
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Latest review:
Extensions- 5 Aug 2020
Jason worked confidently and diligently throughout the build keeping the area clean and tidy as much as he could. The job progressed quite quickly, only being held up with delivery of materials due to Covid 19 short staffing by the suppliers. I am very pleased with the extension that Jason built for me and I am sure that the cost has been outweighed by the added value to my property. I would definitely recommend Jason to anyone and will be using him again for my next project.

4.5

Top rated Extension Builders

Our Extension Builders in Southampton, are rated 4.5 out of 5 based on 6 reviews from customers like you.

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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.