Extension Builders in Portsmouth

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.6 (7 reviews)

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Some of our top rated extension builders in Portsmouth

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melport electrical ltd
Rating: 4.4 out of 5
Extension Builder in Portsmouth
Here at Melport we undertake all aspects of building work & electrical work. Commercial, industrial and domestic works. We also carry out testing and inspecting on all works. We also offer finance on all works above £1000 please ask for my details.
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Latest review:
Extensions- 16 Nov 2024
Absolutely perfect. They weren’t the cheapest quotes for my work but showed genuine interest right from day one. All their employees where polite and considerate and checked if you where happy with their work through out the project. I would highly recommend them for any extension or building work. We are so pleased with the extra space we now have Thank you again Joe and Curtiss
Oakstone Developments
Rating: 5 out of 5
Extension Builder in Portsmouth
At Oakstone Developments, we bring craftsmanship, reliability, and vision together to create exceptional spaces that stand the test of time. From bespoke new builds and luxury home extensions to full-scale renovations, commercial projects, and complete property developments, we handle every stage of the construction process with precision and care. Built on strong values and attention to detail, Oakstone Developments is known for delivering high-quality workmanship, transparent communication, and projects completed to the highest standards. Whether transforming a family home, developing modern living spaces, or managing complex construction projects, our experienced team works closely with clients to turn ideas into reality. We pride ourselves on offering a complete end-to-end service — from planning and design coordination to construction, finishing, and project management — ensuring a smooth and stress-free experience from start to finish. At Oakstone Developments, we don’t just build properties — we build trust, quality, and lasting value.
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Latest review:
Plastering- 1 Apr 2026
They plastered 2 ceilings. Both look fantastic. Thank you.
Property Services Southern
Rating: 4.9 out of 5
Extension Builder in Portsmouth
Over 30 years experience in building industry on the South coast. We have undertaken a vast array of works including extensions, loft conversions, garage conversions, orangeries, conservatories and many more projects. We can also undertake small works. We are a clean, friendly, organised and dependable building company, working in a small team of professional and reliable builders with all trades covered.
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Latest review:
Extensions- 7 Feb 2021
Despite lockdown we really enjoyed having Steve and Colin as our builders for our project. They were very good value for money and we found them reliable, conscientious and friendly. They were very keen to do a good job and kept us informed and involved at all stages. We would recommend them!
Paul Gibbons carpentry and building
Rating: 5 out of 5
Extension Builder in Portsmouth
I'm a time served carpenter who has worked in the construction industry for the last 30years. I'm now carrying out jobs from an outside tap to small extensions. Carpentry ,plumbing, decorating , conversions and extensions
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Latest review:
Carpentry- 15 Aug 2019
Paul done excellent job. I'm very happy with his work in my flat . I very much recommend him to any one. Very good price and very good quality of job. Thank you paul. You deserve 1000 stars instead 5 .
MCD Building Ltd
Rating: 5 out of 5
Extension Builder in Portsmouth
We are a family business which specialises in extensions, refurbishments, driveways, landscaping and patios
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Latest review:
Repairing cracks in ceilings and walls and patch replastering. Mark did an excellent job, he's a great guy, friendly and professional and very respectfull of your property and made sure I was happy with what he had done. Nothing was too much bother. I would definitely get Mark to do any more jobs that might come up. Very satisifed customer.
MD home improvements ltd
Rating: 5 out of 5
Extension Builder in Portsmouth
Professional,reliable and clean plastering and rendering specialist. I have been in the plastering trade for over 20 years and have covered every aspect possible from newly skimmed rooms to complete refurbs. We cover the whole trade. All internal plastering and external rendering including natural lime renders and modern silicone based coloured renders. We also do building works if required. Our team has done single and double storey extensions from start to finish including kitchens and bathrooms. We cover the gosport and fareham area but a broader area for smaller jobs.
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alternative building services southern limited
Rating: 5 out of 5
Extension Builder in Portsmouth
We are specialists in extensions and loft conversions, with over 25 years experience, expert advice given , Architect and planning advice, all work under taken with a contract and 2 million pound liability insurance
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Latest review:
Works consisted of large extension to rear, and front. Fit kitchen, utility, underfloor heating(wet) reconfig mid floor(new bathroom) and 2 bed, 1 bath loft conversion. Colins work, knowledge with his team was excellent. Very professional, reliable and standard of work was first class. Colin kept us informed at all stages of the build. Even with the size of the build it was well managed to leave the house habitable at all times. A credit to the trade and wholeheartedly recommend.
Daniel thomas
Rating: 5 out of 5
Extension Builder in Portsmouth
I’m hard working and friendly and easy to get on with I have a keen eye for doin the job in hand right and neat and will do my best to keep customer happy
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Latest review:
Fencing- 29 Jun 2024
Great job done by father son duo. Polite and friendly, excellent high quality job. Fair price and no problems what so ever. We will be using again
C-W Brickwork
Rating: 5 out of 5
Extension Builder in Portsmouth
Thank you for taking the time to look at my profile. Please do not hesitate to contact me if you require further information. My name Matt from C-W Brickwork. I'm a hardworking professional who relishes in providing a first class service to my customers. I've been a bricklayer for over 20 years and been in the building trade for 22 years. I thoroughly enjoy my work and I love seeing transformations take place. I look forward to hearing from you.
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Latest review:
Bricklaying- 28 Oct 2025
Really professional job replacing our lintel. A few unexpected issues cropped up that was dealt with without any fuss or worry. Would highly recommend
Buildsure
Rating: 5 out of 5
Extension Builder in Portsmouth
We carry out work whatever your needs are we can carry out from footings,to finishing touches. We undertake new build extensions and refublishment domestic and also do shops dental practice and other commercial properties • Driveways • Patios • Brickwork • Dry lining • Plastering • Rendering • Tiling • Carpentry
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Latest review:
Groundwork & Foundations- 27 Apr 2021
Excellent job. Ben and his team were considerate, prompt, hard working and courteous at all times. They did a very good job and cleaned up thoroughly afterwards. Recommended.
CoursebyCourse Brickwork
Rating: 4.9 out of 5
Extension Builder in Portsmouth
CoursebyCourse Brickwork is a professional bricklaying company based in Portsmouth, covering Hampshire and the surrounding areas. We specialise in high-quality residential brickwork including house extensions, garden walls, structural alterations, brick repairs and general masonry. With extensive experience working on both domestic projects and larger construction sites, we bring strong organisation, skill and workmanship to every job. Our focus is always on producing clean, accurate brickwork while maintaining a tidy and safe working environment. We understand how important it is for homeowners to feel confident in the tradespeople working on their property, which is why we always aim to be reliable, tidy and respectful on every project. Free quotations are available and we are always happy to discuss upcoming projects or offer advice where needed. ✔ Fully insured ✔ Experienced and reliable ✔ Free quotations ✔ Guaranteed
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Latest review:
Bricklaying- 28 Oct 2024
Fantastic service, very happy with reaction and works completed.
Oakhurst Building Limited
Rating: 5 out of 5
Extension Builder in Portsmouth
We are a small local family run business with over 17 years of experience in the building industry.
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Latest review:
Restoration & Refurbishment- 23 Apr 2023
Luke contacted me the same day he was shortlisted and then came round and I had the quote by the evening. He did a brilliant job was polite, clean and tidy. We will definitely use him again and would not hesitate to recommend him.
Provini Trades
Rating: 5 out of 5
Extension Builder in Portsmouth
Provini Trades - Konrad. Always finish to high standards! Unrivalled attention to detail, cleaning, protection. Honest and trustworthy.
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Latest review:
Bathroom Fitting- 6 May 2016
Excellent job refitting bathroom, will definitely recommend and re hire for any upcoming jobs.
Lmt carpentry
Rating: 5 out of 5
Extension Builder in Portsmouth
Business has been up and running about 3 years, I mainly do carpentry but can cover all aspects off house renovations
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Latest review:
Extensions- 3 Jun 2020
Prompt, reliable service from the outset. Porch looks great and really sets off the front of the house ! No mess during or after the build. Have already passed on to do work for friends
Elite Brickwork Services (UK)
Rating: 4.6 out of 5
Extension Builder in Portsmouth
Welcome to Elite Brickwork Services (UK), my business aims to provide a professional first class service to all it's customers. No project is too big or small and every job is completed to the highest specification.
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Latest review:
Never done the job. Had to find another contractor.
OP Construction
Rating: 4.9 out of 5
Extension Builder in Portsmouth
OP Construction Ltd is a small business based in Wateelooville providing a professional building, alteration and general property maintenance service. Our personalised and friendly service is specifically tailored for all clients to achieve their building needs.
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Latest review:
Extensions- 13 Feb 2019
OP Construction have recently completed our conservatory replacement. The job was to replace our old conservatory which was too cold in the winter, and too hot in the summer, with single story extension to the house with brick work and a tiled roof. We are thrilled with the final result! Olly and the team were all very professional in their approach. They kept the area clean and tidy, and kept us up to date continuously throughout the build process. The quote was broken down for us, so we could swap some items in or out which we found very useful – but more importantly the job came in on budget and in the time frame agreed. Overall I would not hesitate to recommend OP construction, and will certainly use them again in the future. Great job!

4.6

Top rated Extension Builders

Our Extension Builders in Portsmouth, are rated 4.6 out of 5 based on 7 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Portsmouth?

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

Find extension builders in Portsmouth with MyBuilder

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

Step 2: Compare different extension builders in Portsmouth

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

Step 3: Hire Portsmouth extension builders with confidence

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

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

What to ask a Portsmouth extension builder before hiring?

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

An extension builder in Portsmouth 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 Portsmouth 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 Portsmouth?

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 Portsmouth 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 Portsmouth 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 Portsmouth

Can an extension builder in Portsmouth help with planning permission?

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

Many Portsmouth 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 Portsmouth help with materials and finishes?

Yes, most extension builders in Portsmouth 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.