Extension Builders in Belsize

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (16 reviews)

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Some of our top rated extension builders in Belsize

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S WARAICH CONSTRUCTION LTD
No reviews yet
Extension Builder in Belsize
We do best work
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Read Developments
No reviews yet
Extension Builder in Belsize
Hi there. I'm a fully qualified plaster with over 30 years experience winning awards for my plastering skills. Cover all internal/ external plastering works. Also cover a wide range of other trades in building extensions along with refurbishments. Many thanks Simon
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Stark Management Limited
Rating: 5 out of 5
Extension Builder in Belsize
Accredited with the Federation of Master Builders, TrustMark, Better Business Group and Accreditus Register. Our specialities include New Build Projects, Developments, Extensions and Loft Conversions. We consider ourselves to be different from our competitors as we take on only one project at a time to ensure that we can give our clients our 100% focus and committment.
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Latest review:
New Builds- 24 Jul 2025
job
M&M Building
Rating: 4.5 out of 5
Extension Builder in Belsize
Bathroom and Kitchen renovation, floor and wall tilling, wooden floor, kitchen and bathroom plumbing, painting, wood renovation
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Latest review:
Bathroom Fitting- 19 Jan 2021
Efficient, good service. Work not carried out due to job being bigger than expected but good advice given. Will reschedule.
Catalin
No reviews yet
Extension Builder in Belsize
I am pleased to introduce myself as a small construction company. I am working in this field from over 10 years. I have a proven history of providing quality work and I am confident I can provide the same level of service to your project. I do all kinds of jobs from little extensions to variety of construction projects, so if you like to learn about the services or contact for a consultation I am look forward to hearing from you!
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Guri*s Brothers
No reviews yet
Extension Builder in Belsize
Landscaping,gardens,paving,maintenance
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Provision design & build limited
No reviews yet
Extension Builder in Belsize
Provision design & Build Limited is a family-run company that has built its reputation on the basis of quality and value of work. We pride ourselves on our high standards of work and excellent results, which have resulted in a high volume of recommendations from our clients. Our team has extensive experience in undertaking projects ranging from minor repairs and maintenance to major refurbishment ,Extensions ,Loft conversion ,New build and construction works.
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Eddie&Sons
No reviews yet
Extension Builder in Belsize
23 years of experience in building trade, starting from fitting kitchens, doors, skirtings, walls, ceilings, extensions, lofts, gardening+fences etc etc.
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Carry on laying
No reviews yet
Extension Builder in Belsize
My name is John,I’m 43 and live in Watford I have been bricklaying/landscaping for 23 years now. I have a good friendly team of professional tradesmen who are reliable and very hard working Over the years we have been involved various small and large projects,varying from garden works to new builds.we are also lucky enough to have been part of a number of film and media projects 🎥 We love what we do and always compete jobs to a high standard,we take great pride in every job we are lucky enough to be involved in
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Vincitore Construction Ltd
No reviews yet
Extension Builder in Belsize
Vincitore provides a fully comprehensive bespoke construction and renovation service for both Residential and Commercial clients in London. We provide exceptional standards and commitment to our projects. Our approach for the highest quality service is very simple – trust, competence and integrity. Vincitore Construction Ltd is a comprehensive provider of Building & Civil engineering services. Their expertise spans across various domains, including New Builds, Major Extensions, Major Refurbishment, and Property Maintenance works. Our goal is to become the top operator recognized for quality, integrity, customer support, respect for individuals, and delivering exceptional value.
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Parm builder
No reviews yet
Extension Builder in Belsize
We are ready to build anything whether it’s ur dream home or the biggest. We make our customers happy always We always listing them first nicely then we start the job. And we doing everything all building work like elctric,plumbing,extension,garage,loft,bathroom,kitchen .
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Israel torres
No reviews yet
Extension Builder in Belsize
Tiling, painting, block layer, drywall design,
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Oliver Edwards developments limited
No reviews yet
Extension Builder in Belsize
Oliver Edwards Developments is a family run business with years of experience, we specialise in a list of areas such as. Loft conversions Extensions Refurbishments Kitchens Bathrooms We pride ourselves on carrying out work to the highest standard with complete customer satisfaction.
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Andrea Elezi
No reviews yet
Extension Builder in Belsize
My name is Andrea Elezi, I am a family man with with 3 children. I have worked in the construction industry for over 25yrs and over this period of time I have gained a vast experience in a broad range of construction types form small ground works and landscaping works to the construction of basements and multi-story concrete frames. Throughout my Career to date, I have worked my way up to contracts manager.Then in 2017 myself and one of my colleagues decided to set up our own company
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Effort Construction LTD
No reviews yet
Extension Builder in Belsize
We are small construction company based in the London Borough of Sutton. Although relatively young, we have decade or two of expierience in building industry. We carry out foundations, underpinning, reinforcing works, groundworks, extensions, refurbishments, decorating etc. Providing reliable and cost effective building services tailored to meet our customers bugets.
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Raj Builder
No reviews yet
Extension Builder in Belsize
MyBuilder is a UK-based online marketplace and matchmaking platform that connects homeowners with local, reliable tradespeople (such as builders, plumbers, electricians, roofers, and other home improvement professionals. MyBuilder is a UK-based online marketplace and matchmaking platform that connects homeowners with local, reliable tradespeople (such as builders, plumbers, electricians, roofers, and other homes - **For homeowners**: Post a job for free (e.g., extensions, kitchens, bathrooms, roofing, gardening). The platform uses a matchmaking system to alert relevant, verified tradespeople in your area. You receive interest from tradespeople, review their profiles (including past work history, customer feedback, ratings, and references), chat directly, compare quotes, and hire the best fit. No fees MyBuilder is a UK-based online marketplace and matchmaking platform that connects homeowners with local, reliable tradespeople (such as builders, plumbers, electricians, roofers, and other home improvement professionals). Founded in 2018 by Raj (a stonemason and roofer frustrated with traditional ways of finding work), MyBuilder started as a simple idea to help consumers find trustworthy local builders and tradespeople more
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3.9

Top rated Extension Builders

Our Extension Builders in Belsize, are rated 3.9 out of 5 based on 16 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.