Extension Builders in West 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 West Hampstead

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Carnot Construction Limited
Rating: 5 out of 5
Extension Builder in West Hampstead
Carnot Construction are committed to ensuring our clients are satisfied from beginning to end, we aim to take the stress out of building work and complete all projects as swiftly and cleanly as possible. We ensure our clients are in safe hands with strict contracts in place to protect both parties. We specialise in Extensions, New builds, Loft Conversions, General Conversions, Kitchen and bathroom renovation/fitting.
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Latest review:
Extensions- 15 Aug 2018
100% RECOMMENDED Michelle and her partner measured up and competitively quoted within a short space of time. She was then very patient and supportive when unforeseen planning issues popped up and set the start date back by quite some time. Once building started, all questions were promptly answered by either the site manager or Michelle, both being available at all times. I was away for the duration of most of the job and it was very reassuring to know that I was leaving it all in capable and honest hands. The workers were very proficient and tidied up after themselves at end of each day. They also put in some very long hours at times to hasten the work. I was also impressed by the handling of unexpected problems during the building (mainly invasive tree stumps!). I am absolutely thrilled with the end result. High quality workmanship and a beautiful building which I am sure will last many years. I would certainly recommend them without a doubt.
Venher Limited
Rating: 5 out of 5
Extension Builder in West Hampstead
We can undertake all your heating works as we are Gas Safe registered our service provides the safest solutions and the highest quality standard of work. Our heating & gas services include: • Gas and Central Heating Installation • Gas Safe Registered • Landlord Gas Safety Checks • Boiler Installation, Repair and Service • Gas Cooker and Fire Installation, Service and Replacement • Safe Capping Off of Unused Gas Pipework • Radiator Installation, Relocation, Repair • Thermostats and Smart Thermostats Installed and Replaced • Bathroom and Wet Room fitting • Pipework Replacement, Lead Pipework Removed and Replaced • Leak Detection
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Latest review:
Gas Work- 3 May 2026
Very professional, thorough with good communication. Explained the job. There was a slight increase in initial work, which did incur an additional cost but it was explained clearly by him. Would definitely recommend and use again
Albenathy Construction Limited
No reviews yet
Extension Builder in West Hampstead
my goals is to satisfied my clients and deliver my job with perfection. we accept small, medium and big jobs. my services are - General construction - Repair, Electricity... - Emergency work - Residential and commercial - Subcontractor...
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GDM BUILDING SOLUTIONS
Rating: 5 out of 5
Extension Builder in West Hampstead
With forty years of construction experience we are qualified tradespeople Our range of construction projects include kitchens & bathrooms, refurbishments, loft conversions and extensions. We project manage our work and believe that good clear communication with our clients is key to a successful project- from our first consultation visit, the quotation and build process. We want our clients to be delighted with both the quality of our work, and the manner in which it is carried out.
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Latest review:
Extensions- 13 Jan 2019
George was excellent throughout - would highly recommend. Although I did not hire George to complete the whole job (as someone in my family is a bricklayer) he was instrumental in completing the build. A few points to demonstrate: - Fair and transparent quote (which was stuck to); - Flexible throughout delays caused by me (planning, etc.); - Supportive (advice on what he would do if he was running whole job); - Professional (including team). I will use him again.
Ricardo
No reviews yet
Extension Builder in West Hampstead
Brick work ,roof, timber work , tile,tiler
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Kevin Mateus
No reviews yet
Extension Builder in West Hampstead
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Better building
No reviews yet
Extension Builder in West Hampstead
High ticket jobs
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Pawel Property Maintenance
No reviews yet
Extension Builder in West Hampstead
Pawel Property Maintenance With over 20 years of hands-on industry experience, Pawel Property Maintenance delivers high-quality building, renovation, and property improvement services across London. Built on craftsmanship, reliability, and attention to detail, the company has earned a strong reputation for completing projects to the highest professional standards. Specialising in residential and commercial property maintenance, refurbishments, painting and decorating, carpentry, kitchen and bathroom installations, and general building works, Pawel Property Maintenance combines traditional building expertise with modern finishing standards. Every project is managed with precision, clear communication, and a commitment to customer satisfaction from start to finish. Led by an experienced master builder, the company takes pride in providing dependable workmanship, practical solutions, and exceptional finishes — whether carrying out full property refurbishments or smaller maintenance works. Known for professionalism, efficiency, and honest service, Pawel Property Maintenance continues to build long-term relationships with homeowners, landlords, and businesses throughout London.
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Thomas Wicks Building Services Ltd
Rating: 5 out of 5
Extension Builder in West Hampstead
We are a growing domestic building company, with 20 years of experience carrying out all aspects of residential building projects. Extensions, Kitchens, Bathrooms and all of the related services such as Plumbing, Tiling, Electrics. We pride ourselves on giving the customer exactly what they want, making the experience of improving their property an enjoyable one.
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Latest review:
Bathroom Fitting- 2 Jan 2018
Tom was brilliant from start to finish. Clean and very personable, we have used him again since and will do in the future.
Plaza
No reviews yet
Extension Builder in West Hampstead
With over 10 years of experience in the London construction market, our company provides a wide range of professional building and renovation services. We specialise primarily in all types of tiling work — whether for bathrooms, kitchens, gardens, or outdoor areas. In addition, we handle smaller tasks such as painting, repairs, and installations, as well as full-scale plumbing, electrical work, and complete refurbishments. We take great pride in our reliability, punctuality, and the high quality of our workmanship. Every project is carried out with exceptional attention to detail, ensuring cleanliness, precision, and a solid guarantee on all completed work. I’m are always happy to offer expert advice and support throughout the renovation process, including assistance with sourcing and delivering materials needed for the job. My works covers a wide range of projects — from full bathroom renovations to flooring, kitchen upgrades, exterior work, and bricklaying. Upon request, I can also provide client recommendations from previous projects to confirm the quality of service
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Essem Designs Ltd
No reviews yet
Extension Builder in West Hampstead
New to ‘MyBuilder’. A qualified Architectural Technologist (CIAT accredited) with over 12 years industry experience ranging from high-end commercial, residential, retail (such as KFC, Wasabi, Starbucks, Watirose, Subways etc) and Stadium projects. All architectural & struc services are offered from planning to building control packages up to completion. Please contact us to determine the level of service you require and to make a FREE initial assessment and provide a fee proposal.
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Humphrys Maintenance Services Ltd
Rating: 4.5 out of 5
Extension Builder in West Hampstead
Family run building & construction company specialising in extensions, refurbishments and specialist DDA adaptations works. We cover all works trades and will provide an excellent finish to your project. We also carry out hard and soft landscaping!
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Latest review:
Extensions- 21 Aug 2020
Cannot fault the twins they have catered so much for me and my family. They've accomadated all my changes throughout and advised throughout the whole process....4 to 6 weeks to completion...but what an amazing bunch of guys to come across... Cant fault them one bit.... You'll be proud to gave this team do any work for you.... One happy family...x
XtraForce Limited
No reviews yet
Extension Builder in West Hampstead
XtraForce Limited are experienced building contractors and fully insured for the works we carry out. We are currently in the process of going through "The Federation of Master Builders" accreditation. We offer whole building packages ranging from extensions to new traditional house builds. We currently work as sub contractors to main contractors doing basement construction, basement conversions to reinforced concrete frames and structural alterations to existing homes to create larger spaces.
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NESIMI CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in West Hampstead
Nesimi construction ltd With over 18 years of experience, we specialise in bricklaying, driveways, and paving. We carry out all types of work including garden walls, patios, extensions, repairs, and general building. We pride ourselves on high-quality workmanship, reliability, and attention to detail. All jobs are completed to a high standard, on time, and at competitive prices. Friendly, honest, and professional service from start to finish.
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Latest review:
When Mr Nesimi came to undertake a pre-assessment for my front wall, he came across very professional and genuine and very honest about the work needed doing. He even suggested some changes to the work to reduce cost. The quote he gave me for the job was very reasonable and he was able to slot in my job within a week and arrive sharp on time at 8am and got on to the job straight away as I had a busy day at work for me to attend to. I notice that right from the start he was very clean and meticulous with the work and his job was of a very high quality ( compared to a job I had done by another builder 9 months ago). My neighbours also noticed this difference and were praising Mr Nesimi’s work. I would definitely recommend Mr Nesimi for any construction work as I felt he was very professional, reliable and honest and most of all the work was of high quality. I will be certainly calling him for my next job, most likely the driveway resurfacing and the attic conversion within the next year.
Jas & Savoy Construction ltd
Rating: 5 out of 5
Extension Builder in West Hampstead
Building work,rear&side extention,loft conversion,kitchen,bath room,drive way, shed all type of work undertaken
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Latest review:
Extensions- 27 Jul 2016
I am so overwhelmed with this company after having bad luck with another company I would really recommend Jas & Savoy to everyone I have had a single storey extension- They are very respectable 1000%- The work they do is highly professional- Also at a very good reasonable price- I did not even have to watch them- They stay in contact with the building control, I am lost for words... They follow the drawings, and do exactly what you want... Beautiful work very highly recommended.... Thank you so much for your hard work Jas & Savoy Construction ltd
Justas Kusak
Rating: 5 out of 5
Extension Builder in West Hampstead
I'm a self employed roofer for more than 14 years now. Roofing specialist you can rely on. 10 year Warranty for work. EPDM, GRP, Felt, RESITRIX, Kemperol, lead, slates, tiles, skylights and more...
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Latest review:
Fascias & Soffits- 19 Aug 2019
Very happy with the work Justas did, house looks much tidier with the new fascias and guttering. He arrived on time, quoted a fair price and did a good job. I would happily recommend and hire him again.

4.2

Top rated Extension Builders

Our Extension Builders in West 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 West 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 West 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 West Hampstead who are available and interested can respond to your post.

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

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

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

Find extension builders in West Hampstead with MyBuilder

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

Step 2: Compare different extension builders in West Hampstead

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

Step 3: Hire West Hampstead extension builders with confidence

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

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

What to ask a West Hampstead extension builder before hiring?

Before hiring an extension builder in West Hampstead or extension building company in West 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 West Hampstead?

An extension builder in West 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 West 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 West 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 West 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 West 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 West Hampstead

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

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

Many West 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 West Hampstead help with materials and finishes?

Yes, most extension builders in West 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.