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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M woodley and son
No reviews yet
Extension Builder in South Hampstead
We offer bespoke property service with over 30 years of experience , we specialise in large scale properties refurbs and new builds so we’re happy to undertake any job of any size , from herringbone flooring to bespoke bathrooms and kitchens
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Mc Donald Ltd
No reviews yet
Extension Builder in South Hampstead
Mc Donald offer a wide range of services that cover the entire project. From concept to completion. Our wide range of capabilities means you’ll always have our in-depth expertise, experience and know-how at your disposal. By providing every service under one roof, Mc Donald Ltd can handle your entire project from start to finish. This includes architectural planning, designing, building regulations and planning permission, structural engineering, constructing and managing your project.
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L.A. Morris groundworks Ltd
No reviews yet
Extension Builder in South Hampstead
20 years experience - We cover Groundwork’s, brickworks, driveways, big developments, fencing, new builds, very reliable and excellent service.
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J and J Building and Renovating Services Ltd
No reviews yet
Extension Builder in South Hampstead
JJ Building is a full service Building Company. We have been trading for over 25 years and carry out all types of work from from flooring to new kitchens and bathrooms to extensions and everything in between, no job is too big or too small. Please look at our Services page for a full scope of the work we do.
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Shergill Heating & Gas Services
No reviews yet
Extension Builder in South Hampstead
Over 20 years experience in all Building works, from developing New Build Flats, and Homes, down to all refurbishments and small renovation works. We can handle the job no matter how big or small it is, with our skilled and knowledgable team who have experience in all types of building, plumbing, electrical and carpentry work, we have you covered!
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Nms building ltd
No reviews yet
Extension Builder in South Hampstead
Kitchen extension Loft conversion and internal alterations
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Fourth Little Pig
No reviews yet
Extension Builder in South Hampstead
We are a specialist garden room company that offers beautiful buildings with bespoke dimensions and finishes while remaining affordable. We make this possible through our advanced, integrated design and manufacturing system which reduces cost without compromising on quality. Our system allows us to offer customers the ability to self design their garden room online and see instant pricing as they make changes. We use timber frame construction which reduces the overall footprint and cost, and our quality detailing and craftsmanship means it doesn't compromise on longevity or aesthetics while delivering better insulation and lower heating costs in winter months than alternative materials. Don't settle for standard when you could have bespoke!
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Mag Design & Build
No reviews yet
Extension Builder in South Hampstead
At Mag Design & Build we pride ourselves on quality of work and the finished job. We take on all building work. Free quotes and easy option payment plans make the process simple and easy to work with.
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SPB Building Services Ltd
Rating: 4.8 out of 5
Extension Builder in South Hampstead
SPB Building Services Ltd caters for both residential and commercial work. We offer high quality workmanship and competitive prices. We undertake both large and small scale projects and pay great attention to detail. Are you looking for a reliable and affordable building company to handle your next project? Contact us today and let us turn your vision into reality Whether you need a new home, an office, a renovation, or anything in between, we have the skills and experience to make it happen
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Latest review:
Bathroom Fitting- 4 May 2026
Very good would recommend
Simarji Singh
No reviews yet
Extension Builder in South Hampstead
At Simar Construction, we bring craftsmanship and design together to transform your home. Whether it’s a luxury kitchen, a bespoke bedroom, or a full home renovation, our skilled team delivers quality you can see and service you can trust. We handle every aspect of your project — plumbing, electrical work, loft conversions, house extensions, and driveways — all completed with precision and care. With years of experience and a commitment to excellence, Simar Construction ensures your home is built to the highest standard — from concept to creation.
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C M Maintenance
No reviews yet
Extension Builder in South Hampstead
My business is formed as a sole trader business in 2002. Have been working in domestic and commercial sectors(hospitals,schools and public houses )We are construction and building company and have been building extensions, completely refurbishment ground work etc. We have also certificate as a instalers for flat roofs with all sort of membranes and provide our clients with NIC and Gas safe certificate for our complete work.
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JCH Home improvements & landscaping
Rating: 5 out of 5
Extension Builder in South Hampstead
Local builder with 20 years experience in the construction industry. From extensions to bathrooms, windows, doors, patios, kitchens, fully landscaped gardens. Please get in contact for your free no obligation quote
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Latest review:
Decking- 14 Jun 2022
James Hynes of JCH Home Improvements have just refurbished our decking area. We thought it was a straight forward job, just to renew the decking and a tidy up BUT the original wood was so rotted the whole area had to be renewed. Joists, upright timbers etc We are thrilled with what James has done, so much more work than anticipated but the end result is fantastic. Would thoroughly recommend JCH Home Improvements and we will be using the again.
Guarded Properties
Rating: 4.7 out of 5
Extension Builder in South Hampstead
All works covered by £1m Public Liability All Building Works New Builds Extensions Refurbishments Outbuildings Roofing Bricklaying Electrics Carpentry GRP Roofing Asbestos Roofs Flooring Fascias Guttering Plastering Tiling Painting Decorating Ground Works Patios & Paving Fencing Carpeting Liaising with Building Control & Planning Your one stop construction shop!! High quality works Competitively priced Will beat any formal quotation on like for like basis!
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Latest review:
Extensions- 4 Jun 2022
Danny designed and built us a garden room to fit a challenging space at the bottom of our garden. His communication from start to finish was excellent, and he did an brilliant job on the room, inside and out. I would recommend Danny for any job, big or small.
Building Contractors UK
Rating: 5 out of 5
Extension Builder in South Hampstead
Commercial and domestic building company ,that cover all types of works . Exstentions Kitchens Bathrooms Structural steels
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Latest review:
Extensions- 5 May 2020
Amazing !!!!! From start to finish !!! Clear communist at all times , approachable , friendly .. treats you like a client not just a job . Pricing was sensible . Attention to detail was second to none . Finish was just amazing . Was so impressed have already recommended to my clients and a job has been acquired .. I will be having back to do remainder of extension and a few more rooms in house . Could not be happier and nor will you !
Sharphurst Contractors Ltd
No reviews yet
Extension Builder in South Hampstead
Sharphurst Contractors provide a complete range of building and property services. We are committed to providing a high-quality, reliable and cost-effective service, delivered by our friendly team who hold a diverse range of knowledge in all key areas of the business.
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Nobel LUX LTD
No reviews yet
Extension Builder in South Hampstead
We have 10 years experience in fitting kitchen and furniture for brands as Wren kitchen, Schimdt and other brands furniture and kitchen. As we are doing any extra jobs . We are doing most of the building works. We doing as well extension and refurbishment of your dream house .
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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.