Extension Builders in Belsize

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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Some of our top rated extension builders in Belsize

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Painting company
Rating: 5 out of 5
Extension Builder in Belsize
🔨 Painter & Builder Pro | Decorating & Construction Services Experienced and reliable builder offering a full range of services: ✔️ Painting & Decorating (interior & exterior) ✔️ Plastering & Drywall ✔️ Tiling & Flooring ✔️ Kitchen & Bathroom Renovations ✔️ General Construction & Repairs ✔️ Clean, professional finish every time ✅ Free Quotes ✅ Fully Equipped ✅ On time & Budget ✅ Friendly, Skilled Team Whether it’s one room or a full house, we handle all types of jobs — big or small. 📞 Contact us today and let’s bring your vision to life!
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Latest review:
Painting & Decorating- 11 Jun 2026
Liman done excellent job to complete our project. It is a big project and needs lots attention to details . He guided us through since buying the paints and completed the job with perfection. He was professional throughout and did the job in timely manner. Highly recommended. Thank you.
Grand contractor Ltd
No reviews yet
Extension Builder in Belsize
Grand Contractor Ltd, a trusted provider of skilled and general labour and supplies specifically for the facade and cladding and other building industry . We specialize in supplying reliable, experienced personnel for projects involving curtain walling, rainscreens, metal panels, composite systems, and more. Whether you need a full team or additional labour and supplied material to support your existing crew, we can provide: Curtain Walling/Window/Door installers Cladding Specialist Builders cleaning French Polishing and Magic Man Specialist. General site operatives • Drill lining •Builders Cleaning and site maintenance •Tile and Bathroom • carpentry and joinery Our team understands the demands of facade and other building work—precision, safety, and speed—and we’re committed to helping you meet deadlines without compromising quality. We’d welcome the opportunity to discuss in person how we can support your current or upcoming facade projects. Please feel free to reach out at your convenience
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ANGEL HOUSE
No reviews yet
Extension Builder in Belsize
We offer a wide range of services, which includes all services related to the construction, repair, landscaping of residential or commercial real estate and its surrounding zone. Our large team consists of real qualified professionals with many years of experience in various construction projects.
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Pro West Construction Ltd
No reviews yet
Extension Builder in Belsize
ProWest Construction – Building with Strength, Precision, and Trust ProWest Construction is a professional and forward-thinking construction company dedicated to delivering high-quality building solutions across residential, commercial, and refurbishment sectors. Built on strong foundations of integrity, reliability, and craftsmanship, we pride ourselves on providing exceptional service and outstanding results on every project we undertake. At ProWest Construction, we believe construction is more than assembling materials — it is about creating spaces that support lifestyles, businesses, and communities. Every project represents a client’s vision and investment, and we treat that responsibility with the highest level of professionalism and care. Our Services ProWest Construction offers a comprehensive range of services designed to meet the needs of private homeowners, developers, and commercial clients. Residential Construction, Refurbishment & Structural Alterations Why Choose ProWest Construction? Clients choose ProWest Construction for: • Professional and reliable service • High-quality craftsmanship • Transparent pricing and budgeting • Strong project management • On-time project delivery • Full regulatory compliance
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Terry Agyeman
No reviews yet
Extension Builder in Belsize
Am Terry and a general builder
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Kalinicz build and designe
No reviews yet
Extension Builder in Belsize
Hi my name is Arek I m professional carpenter I have done many wardrobes,kitchens,floors,doors and also lots of roof works loft conversions and many more 20 years experience and all professional tools always on time and always finish the job properly
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Decor Bros Ltd
No reviews yet
Extension Builder in Belsize
About Decor Bros Ltd Decor Bros Ltd is a trusted provider of high-quality painting, decorating, loft conversions, full house refurbishment and summer house extensions across the UK. With a commitment to excellence, we transform residential and commercial spaces with precision, creativity, and durability. Our skilled team specializes in: ✔ Painting & Decorating – Delivering flawless finishes for interiors and exteriors. ✔ Loft Conversions – Maximizing space with innovative and functional designs. ✔ Summer House Extensions – Creating stylish and practical outdoor living spaces. At Decor Bros Ltd, we take pride in delivering exceptional craftsmanship, personalized service, and timely project completion. Whether you’re a homeowner, landlord, business, or developer, we tailor our solutions to meet your unique needs. Let us bring your vision to life with quality you can trust. Get in touch today for a consultation! 📍 Operating UK-Wide
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Asen
New on MyBuilder
Extension Builder in Belsize
Tiler, painter, flooring, drywall, furniture assembly, roof repair, roof building, garden room/outside building, fancer, window fitter, loft conversion, kitchen extension
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Sandhu heating and construction limited
No reviews yet
Extension Builder in Belsize
All Bulding work undertaken
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Stevenmcfaddenandson
No reviews yet
Extension Builder in Belsize
Hi my name is Steven I’ve been in construction since Ive over 20 years work experience . I have many trades under my belt /Groundwork/ landscaping/ Building basements/ Carpentry /Roofing/ Reinforced concrete and form work .With work to a high standard and professional working environment
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Pistol Ltd
No reviews yet
Extension Builder in Belsize
Experienced
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C1brickwork
No reviews yet
Extension Builder in Belsize
At C1Brickwork, we take pride in crafting beautiful, durable, and functional outdoor spaces. With 8 years of experience in bricklaying and landscaping, we combine skill, precision, and creativity to bring your vision to life — whether it's a new patio, garden wall, driveway, or a complete landscape makeover. From the solid foundation of expert brickwork to the finishing touches of lush, well-planned gardens, our work is built to last and designed to impress. We're passionate about quality craftsmanship, attention to detail, and customer satisfaction - because your home deserves nothing less. •Custom brickwork, paving & retaining walls •Garden design & landscaping solutions Driveways, pathways & outdoor living areas Reliable, professional, and affordable service Let's turn your outdoor space into something you'll be proud of for years to come. Contact now for a free quote and see how we can bring your ideas to life.
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Motger Double Glazing Ltd
No reviews yet
Extension Builder in Belsize
Mother double glazing ltd. We recently start our work in london. We provide best services for double glazing in cheap price. We are new in the market in order to this we need to make friends not only the customer. We provide service. Please give chance to us.
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Marker building contractors LTD
No reviews yet
Extension Builder in Belsize
Marker Building Contractors LTD pride ourselves on customer satisfaction. We are a team of specialised tradesman with 15+ years of experience. We cover all aspects of building which include refurbishments, extensions and loft conversions. All jobs are completed to the highest standard by our team of skilled craftsman. We look forward to hearing from you.
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NKA BUILDERS LTD
No reviews yet
Extension Builder in Belsize
We are a company with experience and providing services with best quality and also providing warranty to the work that we build and we have liability insurance covering millions. Our services Paint and decorating Drylining Studs work plaster boarding Insulating Bathroom renovation 3d ceiling plus any other ceiling Flooring and flooring heating Tailing And much more Happy to help to anyone who is interested in our services
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Smart windows
Rating: 5 out of 5
Extension Builder in Belsize
Smart windows from MKD windows Group are a family run business covering Essex and Surrey. We specialise in UPVC , Wood & Aluminium. Offering quality products at quality prices. Reliable service, no pushy salespeople just a straight forward price! Certass registered with a 10 year insurance backed guarantee.
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Latest review:
Windows & Doors (uPVC & Metal)- 13 Mar 2026
Would highly recommend Dean, he removed my window and fitted French doors. Thank you.

4.1

Top rated Extension Builders

Our Extension Builders in Belsize, are rated 4.1 out of 5 based on 18 reviews from customers like you.

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

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

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

What are the hourly rates of extension builders in Belsize?

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

Find extension builders in Belsize with MyBuilder

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

Step 2: Compare different extension builders in Belsize

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

Step 3: Hire Belsize extension builders with confidence

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

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

What to ask a Belsize extension builder before hiring?

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

An extension builder in Belsize 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 Belsize 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 Belsize?

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 Belsize 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 Belsize 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 Belsize

Can an extension builder in Belsize help with planning permission?

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

Many Belsize 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 Belsize help with materials and finishes?

Yes, most extension builders in Belsize 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.