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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Bhullar bhuilders
No reviews yet
Extension Builder in Belsize
We are experienced builders with good team. We have been in to this industry from last 8 years . But the quality we provide is something that everyones are happy with. We do all kind of building work. Extention , bathroom , kitchen , tiling, flooring , plastering .etc. Almost everything .
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JSRM Construction LTD.
No reviews yet
Extension Builder in Belsize
Welcome to JSRM Construction LTD! We are dedicated to delivering top-quality building services tailored to meet your needs. With a team of skilled professionals and years of experience in the construction industry, we specialize in residential and commercial projects, ensuring that every detail is executed to perfection. Our commitment to safety, integrity, and client satisfaction sets us apart. Whether you’re planning a new build, a renovation, or an extension, we’re here to bring your vision to life. Let’s build something great together!
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Junaid Ahmed
No reviews yet
Extension Builder in Belsize
We are doing all kind of building works loft conversion, single or double storey extension, new build homes. Also we don’t charge any upfront, we will charge our clients after the work done and approved from building control
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Buckingham and sons ltd
Rating: 5 out of 5
Extension Builder in Belsize
We are family run business established over 10 years ago covering London in all aspects of building work and property maintenance. We pride ourselves on honest work and good ethics and look forward to working on your next project.
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Latest review:
Restoration & Refurbishment- 10 Jul 2026
Calm, collected and reassuring. J took all the pressure of me - completed all the work in a timely manner to the highest of standards. I really like how he took care of things that I didn't think of. He gave me lots of options about other requirements and where we could save on costs. Really highly recommended!
AJ
No reviews yet
Extension Builder in Belsize
handyman
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ALEX & JOHN LTD
No reviews yet
Extension Builder in Belsize
Alex Constructions specialises in high-quality commercial and residential refurbishments, extensions, conversions, and restorations. With a commitment to excellence, innovation, and customer satisfaction, we transform spaces into modern, functional, and inspiring environments. Our experienced team ensures each project is completed with meticulous attention to detail and the highest standards of craftsmanship. Whether it’s enhancing a commercial space or creating your dream home, Alex Constructions is dedicated to bringing your vision to life with precision and professionalism
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Sonic Building Supplies Ltd
No reviews yet
Extension Builder in Belsize
At Sonic, we provide expert construction, plumbing, electrical and heating services for residential and commercial clients. With years of hands-on experience and a commitment to quality workmanship, our licensed technicians deliver reliable solutions—from routine maintenance and emergency repairs to full system installations. Whether you're dealing with a leaky pipe, faulty wiring, or a broken boiler, we’re here to help 24/7. Serving London, Surrey, Sussex, Hampshire, Berkshire, and surrounding areas, we pride ourselves on prompt service, transparent pricing, and customer satisfaction.
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K&C
No reviews yet
Extension Builder in Belsize
Always up for a challenge and to just go that extra mile to please our customers!
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Yurii Patrash
No reviews yet
Extension Builder in Belsize
Experienced Bricklayer with a Strong Work Ethic I am a professional bricklayer with over 8 years of experience in the construction industry. I specialize in laying bricks, building stone structures, and restoration work. My experience covers a wide range of services, from constructing foundations to building walls, fences, and decorative elements. I ensure every project is executed with great attention to detail and the highest quality standards. Key skills include: • Accurate brick and stone laying; • Building strong foundations, walls, and partitions; • Working with a variety of materials: natural stone, clinker, concrete; • Reading and working from technical drawings and plans; • Handling both large-scale projects and small repairs. I am committed to delivering the best results for my clients: the precision, quality, and durability of my work is my pride. I guarantee top-quality work and timely project completion. Ready to assist with any bricklaying needs in London and surrounding areas!
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Beni The Builder Ltd
Rating: 5 out of 5
Extension Builder in Belsize
I am a mutli trade building company, and I carry out loft conversions, extensions, full refurbishments and renovations, new builds and garage conversions. I also carry out smaller jobs such as both interior and exterior decorating, kitchen fitting, bathroom fitting, tiling and general repair works. We also do fencing, paving and decking.
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Latest review:
Fencing- 9 Jun 2020
To say we are delighted with the results from Beni The Builder, is an understatement.They did an excellent job building a substantial retaining wall using railway sleepers and installing a new fence along the top. They also helped collect materials which enabled us to start the work sooner. Extremely capable and competent team, arrived on time and left the job site clean and tidy after completing the works. They dealt with some difficult ground works easily and expertly. Price was competitive and the quality exceeded expectations. I have no reservation recommending Beni The Builder and will invite them back for some projects we have planned in the near future.
ABL Building & plumbing solutions
Rating: 5 out of 5
Extension Builder in Belsize
We are a family run business, take pride in our work we carry out. We cover all aspects of building works from hanging a door to a complete new build house.
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Latest review:
Plumbing- 28 Jun 2023
Alan was a total professional, clean and tidy, fabulous job, will use him again and recommend him to everyone I know. Top professional.
Capital Construction Projects Ltd
No reviews yet
Extension Builder in Belsize
Loft Conversion Extensions Refurbishment New Build All aspects of building work
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R Willis construction
No reviews yet
Extension Builder in Belsize
I have been a builder for 30 years in that time I have undertaken many varied projects from small building works to big projects from extensions to new build houses and flats. I have also done many conversion projects. No job too small or large .
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Trevillion construction
No reviews yet
Extension Builder in Belsize
My name is Nicky and I have over 15 years bricklaying and landscaping experience. With bricklaying I specialise in restoration and repointing. I am an experienced digger driver as well. Have worked on my own jobs which include garden renovations and extensions, and on bigger sites building new builds. I have recently set up this profile and look forward to new projects. Please feel free to get in contact for a quote or advice.
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Vinna Contracts Limited
No reviews yet
Extension Builder in Belsize
At Vinna Contracts Ltd., we are a premier limited company specializing in dental builds with a growing footprint in other markets. Operating throughout London and Surrey, we bring extensive experience in refurbishments and construction to diverse projects. Our expertise shines in dental practice renovations, where precision and detail are crucial. Yet, our capabilities extend beyond this niche, encompassing a wide range of refurbishment projects. We excel in transforming spaces with a blend of innovation and efficiency. What distinguishes Vinna Contracts Ltd. is our commitment to excellence. Our work philosophy emphasises meticulous planning, clear communication, and superior quality. We strive to exceed expectations, delivering projects on time and within budget, while maintaining the highest standards. For a company that values your vision and delivers exceptional results, choose Vinna Contracts Ltd. We look forward to bringing your project to life.
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XK Constructions
Rating: 5 out of 5
Extension Builder in Belsize
I have been working in building industry for the past 12 years doing loft conversions, extensions and new builds. After so many years of experience i can proudly call myself a high level professional. All my clients were satisfied with my work and can gladly recommend my services. On demand i can take you around to some of my projects. An approximate calculation of the cost to complete the project will be done free of charge to the prospective client.
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Latest review:
Extensions- 7 Mar 2023
My husband and I just bought a house and we were having a real hard time finding a good builder. We registered on MyBuilder and shortlisted a few tradesperson, we then came across this amazing team from XK contractors. They have literally and figuratively been a real blessing. 10 days and they changed the look of our house to our preference. I'm not just writing this review for the sake of it, but they're honestly real hardworking people. The main man- Xhezavir leads the team like a dream and they all know exactly what they're doing. Highly recommended, decent pricing, great work team, keep up the good work!! 👍

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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Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

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.