Extension Builders in South Hampstead

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (20 reviews)

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Some of our top rated extension builders in South Hampstead

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Donaghy & Ross Construction
Rating: 3.7 out of 5
Extension Builder in South Hampstead
At Donaghy&Ross we believe on delivering only the highest quality of work to ensure are clients get the best possible service, with 16 years of experience and NVQ qualifications in brickwork we have the right team to do the right job.
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Latest review:
Bricklaying- 12 Nov 2016
Dear Brian I have tried to contact you on several occasions to complete the job. I really do not wish to leave negative reviews all over the Internet. Will you get in touch? Just ignoring the situation will not go away as I am now in receipt of your insurance documents and want to resolve amicably. I put you on notice to get in touch within 7 days. If I do not hear back I'm afraid I will have to start the legal processes as you give me no other option. I hope to hear from you within the allotted timeframe and do hope we can avoid litigation in this circumstance. Thank you. Dawn
FKL
Rating: 5 out of 5
Extension Builder in South Hampstead
Hi thanks for taking the time to read my company profile, Form Construction specialise in extensions lofts basements and renovations. We strive to deliver quality workmanship. We pride ourselves on being quality tradesmen, always going the extra mile for our clients. We work with many different suppliers to ensure our clients get good value and good quality materials. If you feel we are suitable for your project please get in touch to discuss your project Many thanks John Campbell
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Latest review:
Kitchen Fitting- 3 Sep 2020
Very reliable, hard working and talented ! His quotation was incredibly reasonable too. Very grateful
Angle Construction
Rating: 4.7 out of 5
Extension Builder in South Hampstead
We have been in the construction business for over 15 years doing all sorts of works, from minor works to full home constructions. No job to small no job to big. We work in and around London
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Latest review:
Windows & Doors (uPVC & Metal)- 28 Jan 2026
Very unhappy with how things went with Angle Construction overall. Poor comms during the transaction was the first red flag - no communication for 2 days the moment money was sent, however afterwards received an apologetic call - parts ordered and arrived in due course. Andrei turned up, and got to work on removing the old gate, but then started shaving down the post without saying anything -we were told after that the posts were not level. Eventually he said the door would need to be cut, which we agreed to. The door and posts were both cut to fit, but massive gap left at the bottom, and only half of the door fittings and no handles were installed! In addition, where the door was cut and the wood shaved made, a lot of mess was left all over the garden furniture and patio floor. Shocked at the lack of care and professionalism. He was clearly agitated and in a rush to leave. We have a working back door, but it looks like a real botched job. Not happy, and I would not recommend.
HadleyWoods
Rating: 5 out of 5
Extension Builder in South Hampstead
HadleyWoods provides the highest quality services for your home, office or commercial building. With more than 25 years experience we have many regular customers who would highly recommend us as a professional and respected service, our secret to this success is purely based on employing only the best workers with years of experience and attention to detail.
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Latest review:
Restoration & Refurbishment- 9 Nov 2024
Hasan did a good job removing my 2 chimney breasts. Quick and professional, will definitely use him again for future works
Roman Renovation Service Ltd
No reviews yet
Extension Builder in South Hampstead
At Roman Renovation Service we are a London based team of professionals providing painting, renovation and property maintenance services to your property (residential or commercial). With a combined team of 5+ years of experience in this speciality and outstanding customer service, we are here to support your needs with great care and attention. We will go above and beyond to make sure the job is done right to your satisfaction! We are able to provide a fast and free quote in person, our professionals are able to visit your property on short notice to provide a free of charge quote in person and advice. We look forward to hearing from you!
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Marios Brickwork
No reviews yet
Extension Builder in South Hampstead
Expert in restoring brick and stone walls with precise, durable repointing. Using the right mortar for each property, I ensure walls are weatherproof, structurally sound, and look their best. Free quotes and examples of previous work available.
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MCT Developments Ltd
No reviews yet
Extension Builder in South Hampstead
We pride ourselves in providing a full range of services, executed to the highest standards, from meticulous restoration of listed buildings to the creation of contemporary spaces. Over the years we’ve had the privilege of adding some of the London’s most iconic buildings from Hampton Court Palace to The Savoy Hotel, from Fortnum & Mason to The Connaught Hotel and the Royal Suite at The Mandarin Oriental Hotel to our portfolio. We are able to deliver on all aspects of work from extensions and loft conversions to full refurbishments. When delivering projects with specifications from the more modest to high end and complex, we work with our clients to ensure the highest level of quality and satisfaction. Driven by our core values of excellence, safety, integrity and innovation we continue to deliver an outstanding service for our clients, often exceeding expectations and always within budget. Whether it’s a new construction project, renovation, or sustainable building endeavour, we bring expertise, innovation, and dedication to every phase of the construction process.
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Parris Development
No reviews yet
Extension Builder in South Hampstead
Parris Development covers the full spectrum of residential renovation - from structural remodelling and internal reconfigurations to restoring listed buildings and navigating conservation area constraints. We handle landlord licences for alterations, liaise with building control, and ensure all work is fully compliant with the latest Building Regulations and British Standards. Our team excels at complex projects and collaborates closely with architects, planning consultants, and engineers to deliver seamless, regulation-compliant outcomes that protect your investment and enhance your living space.
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Aviraj Construction Ltd
Rating: 5 out of 5
Extension Builder in South Hampstead
We have been in the construction business over 10+ years. We specialized in complete bathroom renovation, kitchen renovation, flooring. We do extension, loft conversation, carpenter, brickwork, plastering, plumbing & all kind of general building work. We strive to provide 100% client satisfaction. We believe there is no job that can not be accomplished to customer expectation. We go extra mile to ensure that all customer needs and requirements are satisfied.
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Latest review:
Extensions- 7 Oct 2022
Our outdoor office was completed in time and on budget. I’m amazed at how quickly everything was completed and the standard is amazing. Would definitely recommend Parmajit to anyone looking to get a small to medium sized project done.
ALT’s Builders
Rating: 5 out of 5
Extension Builder in South Hampstead
We are a family run business with more than a decade of experience. At ALT’s Builders Ltd we pride ourselves on an efficient and friendly service, and achieve 100% costumer satisfaction ethic. So no matter how big or small your job is we can help. ALT’s Builders Limited is a leading and reputable Construction Company serving around London Ever since we opened for business, we’ve taken a comprehensive approach to construction industry, providing our clients with a wide range of services to cover their needs. our clients are our Number one priority and we go extra mile to make sure they’re completely satisfied. we stand by the excellence of our work and provide clients with personalized attention based on their specific needs. With this service, we’re fully prepared to tackle even the most complex projects and stand by the exceptional quality of our work.
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Latest review:
Loft Conversion- 31 Mar 2026
We recently hired Altin to do our mansard loft conversion and honestly, it was a really good experience from start to finish. He was always on time, worked really hard, and his whole team put in a lot of effort every day. Communication was easy and straightforward, which made things much less stressful for us. The project was finished on time as agreed, and we’re really happy with the quality of the work. Altin was also super helpful whenever we had questions and helped a lot with building control, which made a big difference. It’s quite a messy job (cutting through the ceiling and putting in a staircase), but they did everything they could to keep things as clean and tidy as possible, which we really appreciated. Overall, we had a great experience and are very happy with how everything turned out. I’d definitely recommend Altin to anyone thinking about a loft conversion.
Alsaeed
New on MyBuilder
Extension Builder in South Hampstead
We are a professional building and refurbishment team based in London, with experience in all aspects of construction and home renovation. We specialize in full house refurbishment, flooring, plumbing, electrical work, and general maintenance. With a skilled and reliable team, we are able to manage complete projects from start to finish. We are committed to high-quality workmanship, attention to detail, and completing all jobs on time and within budget. Customer satisfaction is our priority, and we always aim to deliver a professional and clean finish on every project. We are fully flexible and available to travel across London and surrounding areas.
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SPEKT GROUP LTD
Rating: 4.8 out of 5
Extension Builder in South Hampstead
We are a team father and sons, with over 30 years of experience in Wood Occupations and construction sites, who's goal it's to provide our customers with quality services.
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Latest review:
Carpentry- 11 Mar 2025
Great work and would recommend!
JAGJEET SINGH CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in South Hampstead
Hello everyone I am here make easy your home base. And your all type ground work ,drainage, extension your home and make looking nice and cool your garden . ETC house work so please contact with me I have professional team .we done jobs on time and make costumer happy. With affordable price Thank you for reading my company description
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Latest review:
Hard Flooring- 11 Dec 2025
Very professional service with great workmanship and good communication throughout. Solution oriented with very high attention to detail and still somehow fast! Aimiable and highly competent. Did an amazing job fitting my new laminate flooring. Would definitely recommend
B & M Home Improvement
Rating: 5 out of 5
Extension Builder in South Hampstead
We are a local and reliable Plumbing, gas safe and Home Improvement Company in London and surrounding areas.I gained my experience working in the Plumbing and gas department. No matter whether you require help with plumbing, power flushing, boiler installation, bathroom, kitchen, extention, flooring we take on all building work. We provide a full interior decorating service for domestic and commercial.
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Latest review:
Extensions- 10 Apr 2014
Max and Bob completed the extension on time and within budget. There were no hidden extras and despite Bob being on holiday for two weeks, Max worked hard and lon. The extension is 6m x 5m. There were issues with Building Control which Max sorted out and did everything to meet their requirements. The extension is built to a high standard, kitchen cabinets fitted well, tiling very good and we are pleased with the quality of their work. We are using B&M again as we are confident that although they are not tghe cheapest, the quality of their work is of a high standard. Besides, it is always a pleasure to deal with Max who is a gentleman, patient and listens to what is required.
G&J Renovation ltd
Rating: 4.7 out of 5
Extension Builder in South Hampstead
G&J Renovations ltd provides best quality of work as extension refurbishment new build painting plastring loft conversion and all building work
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Latest review:
Restoration & Refurbishment- 4 Mar 2026
Gurpreet and his team done my whole house renovation. Including the kitchen roof, new ceilings, skim/plaster all rooms, new tiles and flooring, all new wiring for the house, change the boiler location and fitted a new boiler .. have absolutely loved this team, especially Gurpreet. . The guy is always there to answer and follow up on any work . The work has been completed to the highest quality and really a trusted and a professional team !!... Even after the work is done, there will be few things but you can contact Gurpreet and he will sort it out for you... Overall a great experience working with this team !! ..I will be looking to get this team for all my future works !!!
Capital building contractors
Rating: 3 out of 5
Extension Builder in South Hampstead
North London based building company committed to provide highest quality service by experienced and highly skilled tradesmen. A team of 3 young tradesmen with an combined experience of over 3 decades in different trades like Carpentry, tiling, painting & decoration, electric and plumbing.
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Latest review:
Bathroom Fitting- 2 Nov 2021
Fair. I think in this stay n age tradesman take jobs that they can’t complete

4.2

Top rated Extension Builders

Our Extension Builders in South Hampstead, are rated 4.2 out of 5 based on 20 reviews from customers like you.

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

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 South Hampstead 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 South Hampstead who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in South Hampstead?

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

Find extension builders in South Hampstead with MyBuilder

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

Step 2: Compare different extension builders in South Hampstead

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

Step 3: Hire South Hampstead extension builders with confidence

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

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

What to ask a South Hampstead extension builder before hiring?

Before hiring an extension builder in South Hampstead or extension building company in South Hampstead, 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 South Hampstead?

An extension builder in South Hampstead 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 South Hampstead 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 South Hampstead?

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 South Hampstead 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 South Hampstead 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 South Hampstead

Can an extension builder in South Hampstead help with planning permission?

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

Many South Hampstead 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 South Hampstead help with materials and finishes?

Yes, most extension builders in South Hampstead 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.