Extension Builders in Westminster

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (18 reviews)

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Some of our top rated extension builders in Westminster

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(TLC) THE LONDON CONSTRUCTION GROUP LTD
Rating: 5 out of 5
Extension Builder in Westminster
cover a broad spectrum within construction ranging from both residential and commercial contracts, bespoke builds, refurbishment, and maintenance also implementation of design from minimalist design to period restoration and renovation of properties.
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Latest review:
Restoration & Refurbishment- 16 May 2021
TLC have completed the first phase of the project which has involved a complete renovation and upgrade of the kitchen, bathroom, and rear garden area. A new contemporary staircase has also been fitted. The work has been completed well ahead of schedule, and this is testament to the planning and coordination skills provided by TLC. All of the work has been completed to a very high standard, and a great deal of care has been taken to ensure the minimum disruption to the local residents. We are extremely grateful for the advice and support provided to us leading up to the restoration work and whilst the restoration was underway, and we are absolutely delighted with the final results. Our house has been transformed into a contemporary family home. Many thanks to Bradley, Paul, and the rest of the team at TLC.
adam lloyd construction ltd
Rating: 5 out of 5
Extension Builder in Westminster
At Adam Lloyd construction we specialise in high end refurbishments but we also undertake small works and maintenance from decorating to landscaping we have excellent tradesmen in-house
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Latest review:
This carpenter is a plywood maestro! My wardrobes are a testament to their craftsmanship – sturdy, stylish, and a definite upgrade from my previous cardboard chaos. Would highly recommend for a wardrobe transformation that's as solid as it is delightful. ⚒️👌 Top notch, class A stuff 👍🏻
GRB Building and Home Improvements
Rating: 5 out of 5
Extension Builder in Westminster
At GRB Home Improvements we have over 15 Years experience in general building contracting including extensions, kitchen and bathroom refits, loft conversions, garden landscaping, patios and outbuildings, drainage and groundwork, drives and general building maintenance. We passionately believe in customer satisfaction and strive to ensure that our quality work is delivered on time, as per the agreed schedule, and that we come in on budget.
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Latest review:
Carpentry- 24 Jan 2021
George came to do up our hallway. He laid flooring and installed new spindles and a handrail on our stairs too. He did a wonderful job on the whole lot and we were very happy with him. We were awkward and changed our mind on the first laminate flooring that I had picked out online, he ripped it up and started again with the new flooring we picked and it was no hassle to him. George is a lovely fella, trustworthy and professional. Would highly recommend
ADJ Builders Limited
Rating: 5 out of 5
Extension Builder in Westminster
Hello ..my name is Alfred. I, have over 12 years of experience in building site. Perfectionist in my work and ability to guarantee customer satisfaction. Hard working and ensures all deadlines and targets are met. A good eye for detail, precise and accurate at all times and will complete all work to the highest standards.My experience shows in the finish, with no visible streaks. Polite friendly and helpful.
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Latest review:
Painting & Decorating- 6 Oct 2022
Very pleased with our choice. We initially got four quotes from different builders, most of them were terrible at communicating apart from Alfred. He was very easy to work with, responsive and very careful with our brand new house. His team was hard working, tidy and fast. They completely renovated our garden from removal of old decking and gravel to setting up new fences, levelling and turfing the ground. They also removed our old kitchen, partition wall and carpet, as well as did jobs like plastering, building a wall and set up lights and shelves. We’ll surely have him back soon to work on other jobs.
Adam Favor
Rating: 4.8 out of 5
Extension Builder in Westminster
Our business was founded to offer clients the opportunity to bring a vision to life. As a design & build business we can take your dream home concept and turn it into reality. We will provide you with design plans for your projects and thorough project management. We also have the professional, experienced and quality tradesmen that are essential to complete the construction phase of the project.
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Latest review:
Plastering- 17 Jun 2024
Adam Favor and NOVA Design & Build are a nice bunch of guys and they are reliable/helpful. However, when it came to coving, architrave and flooring, acceptable standards were unfortunately not met. Other specialists had to be brought in to re-do around 20% of the job; namely certain sections of the cornice and door architrave. In the former, a few things were below standard including: 1) not joining the friezes in the correct places, 2) cutting inaccurately, 3) leaving gaps, 4) using silicon as a filler and adhesive. For the door architrave, the wood was misaligned and not glued/nailed properly. The flooring was not laid well because there are huge gaps at times; sometimes at 1 cm. Since the kitchen has been installed, it is too late to take up the floorboards again. The most dubious thing of all in this job was the quote received for decorating which was c. 15k for 47 m2. This included plastering repairs, but ultimately the job got done by someone else to a high standard at 7k.
VCKS
Rating: 5 out of 5
Extension Builder in Westminster
VCKS Professional service provided on time
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Latest review:
Tiling- 10 May 2025
Victor is excellent. Gave a competitive quote and stuck to it. Victor works quietly and thoroughly. The job was completed on time and to a high standard. I will use him again and I recommend him.
MT Building Services
Rating: 4.9 out of 5
Extension Builder in Westminster
MT Building Services here, we undertake all Building construction work from beginning to end. We are specialised in loft conversions, extension, full house refurbishments. We undertake small jobs aswell as flooring, kitchens,doors etc etc. Contact us for quotations. Thanks MT BUILDING SERVICES
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Latest review:
Restoration & Refurbishment- 2 Aug 2025
Asen did an incredible job! In just under 4 weeks he managed to assemble a team and complete renovation on a 2 bed flat including: * Full rewiring, new lights, updating and adding sockets * Fixing rotten and uneven subfloor and levelling the whole house * Wood flooring throughout - done excellently with no thresholds * New boiler and all new radiators * Built a pocket door at the porch to stop our kitties from escaping * Tiled the fireplace * Skirting, decorating and repainting the entire flat * Dealt with gutting the place and arranging pickup of rubish The place looks and feels amazing and everything works! Asen was good on the price, kept to the (very tight) timelines, great communication throughout and overall very professional and friendly! Pics shows after and during the work, ignore the moving boxes.
Vadet Construction
Rating: 5 out of 5
Extension Builder in Westminster
With over 20 years of experience in the construction industry. We provide high-quality services covering everything from strip-out to brickwork, electrical, plumbing, carpentry, tiling, plastering, flooring, and painting, leaving a tidy, clean site.
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Latest review:
Bathroom Fitting- 7 Jun 2026
We recently had our bathrooms refurbished by Vasile and his team, and we are absolutely delighted with the results. From the very beginning, they were professional, reliable, kind, and exceptionally helpful. Vasile was always available to discuss every aspect of the project, taking the time to explain things clearly and answer our questions with patience and honesty. It felt as though we had a genuine partner supporting us through the renovation of our three-bedroom flat. Vasile and his team were fully invested in achieving the best possible outcome and were always willing to go the extra mile when challenges arose. The quality of their work is outstanding. They worked efficiently, kept us informed throughout, and ensured everything was completed in a timely manner without compromising on quality. We would wholeheartedly recommend Vasile and his team to anyone looking for skilled, trustworthy, and genuinely caring professionals.
Remas Construction
Rating: 5 out of 5
Extension Builder in Westminster
I been in construction field for over 16 years: (Electric, Plumbing, Plasterboard, Painting, Flooring, Carpentry, GlassWork, Kitchen & Bathroom, Extension and much more..) I believe that quality is the result of careful planning and execution. Daily maintenance solutions.. (Urgent & Same day Service). Best price in London, Guarantee 💯 GENERAL CONTRACTOR'S Commercial & Residential Home inspection
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Latest review:
Ahmad did an exceptionally good job. He painted a large number of walls, filled them, gave me a recommendation as to what paint should be used and left everything clean and tidy every day. Highly recommended.
Arethusa Restoration
Rating: 5 out of 5
Extension Builder in Westminster
"ARL-Contractors" Arethusa Restoration Limited Is an Italian company offering an unrivalled quality of service as both Principal contractor in the refurbishment and renovation of houses, extensions, loft conversion and, commercial restoration and fit-out & Specialist contractors in the restoration of period and historic buildings, offering a niche service spanning traditional façade cleaning, restoration, conversion into new luxury modernised living spaces.
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Latest review:
Plastering- 19 Dec 2018
Roberto came out to site and quoted, I felt very confident and reassured by him very quickly. He quoted for the whole work and arrived and left on time. There was a lot of attention to detail on this job I am happy with his work, he is highly skilled, works hard and is also nice to be around. I will hire him again, if I need his speciality services in the near future.
Nick the Brick
Rating: 5 out of 5
Extension Builder in Westminster
Hello everybody, my name is Nico and I’m a bricklayer with Diploma and NVQ in bricklaying, I been working as a bricklayer for the last 10 years and after been working for all the main high standard bricklayer company I have decide to start my own company. In those years I always been appreciate for my professionalism and the quality of my work, including my obsession with details,I’m confident to say that I can take any expects of brick/block work. please feel free to contact me anytime.
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Latest review:
Demolition- 26 Aug 2025
Nico did an amazing job on emptying, demolishing and clearing the shed. It was much harder than anticipated but Nico and his team went above and beyond to do the job, leaving everything clean and tidy. Thank you for your hard work. Nico was always polite, courteous and super prompt. I will be using Nico’s services again and can highly recommend him to others.
Estate Renovation (Al Huda Corporation Ltd)
Rating: 5 out of 5
Extension Builder in Westminster
Estate Renovation provides substantial building maintenance and development services, which include but are not limited to: kitchen & bathroom renovation, property refurbishment, extension, conversion, paint & decoration, electrical and plumbing services. Our main purpose is to provide your home with safety, comfort and beauty. We are prepared to face any challenges and always strive to achieve continual improvement of our values and standards during projects.
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Latest review:
Bathroom Fitting- 30 May 2022
Mohammed Huda and his builder were professional and quick to attend our job –– recommend! The communication was fast and professional. Mohammed provided a detailed quote (our job had to go through insurance) that is fair and transparent. The builder who came around, Jafa, was very respectful to our things. We were able to trust him from the get-go and had a peace of mind when he was working. He works incredibly hard and is methodical in his process (e.g. painting ceiling first, then walls, so to avoid splatter unevenness). They responded to our requests quickly and fixed things we weren't 100% happy with. The team finished the job ahead of time, and gave us tips for refurbishing in the future. Very happy and highly recommend!
NA
Rating: 5 out of 5
Extension Builder in Westminster
Skilled, tidy bricklayer. Highly competent in building, pointing and restoration. Garden walls, extensions, new builds, etc
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Latest review:
Jack built a brick buttress to structurally support my garden wall. Originally I was going to rebuild the entire wall, but Jack’s advice to build a buttress saved me a lot of money! The job was done quickly, affordably and to a high standard. Would highly recommend.
Rizart terzeta
Rating: 5 out of 5
Extension Builder in Westminster
Experienced London-based carpenter specialising in commercial and residential work. Certified fire door installer, delivering high-quality, reliable, and compliant workmanship. Tape and joint Painting Glazing Partition walls Wall panels Standard doors Fire doors
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Latest review:
Carpentry- 10 Nov 2025
We know how difficult is to find someone reliable who knows what is doing. Well ,Rizart is the one who you can trust, relay on and have the job done in no time. 8 fire doors fitted in 2 days with certificates Thank you Rizart
MAF Contacts
Rating: 5 out of 5
Extension Builder in Westminster
Hello, My name is Dan Maftei, Founder of MAF Contracts ltd. MAF offers a range of services like demolition( stripping out), Plumbing, Electric, Rendering and Plastering, Painting and decorating, Tiling, Flooring, Carpentry first fix and second fix, Paving, Roofing, extension and Loft conversion. We can deal with big projects as well as small ones. Thank you, Dan Maftei
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Latest review:
Restoration & Refurbishment- 29 Dec 2018
Amazing work. A job very well done. Very hardworking people and high quality work. All was delivered exactly as agreed in time and to perfection. Thank you again for transforming my flat in such a lovely space.
CRAFTSMAN CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in Westminster
Welcome, and thank you for choosing us for your construction needs. We want you to feel completely comfortable and at ease when speaking with us. No question is too small or too big — we are here to listen, guide you, and support you at every step of your project. Our goal is to create a peaceful, respectful, and open environment where you can freely share your ideas, concerns, and expectations. We look forward to working with you and turning your vision into reality. Please feel free to reach out anytime. We are always happy to help.
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Latest review:
Extensions- 3 Feb 2026
The job went perfectly. The Builders arrived on time and finished all the work in two days the work was completed to a perfect standard he even cleaned up some of the mess that previous Builders had left behind, their work. I can say without hesitation is exemplary. I would highly recommend hiring Craftsman Construction Limited

4.3

Top rated Extension Builders

Our Extension Builders in Westminster, are rated 4.3 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 Westminster?

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

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

What are the hourly rates of extension builders in Westminster?

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

Find extension builders in Westminster with MyBuilder

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

Step 2: Compare different extension builders in Westminster

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

Step 3: Hire Westminster extension builders with confidence

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

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

What to ask a Westminster extension builder before hiring?

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

An extension builder in Westminster 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 Westminster 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 Westminster?

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 Westminster 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 Westminster 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 Westminster

Can an extension builder in Westminster help with planning permission?

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

Many Westminster 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 Westminster help with materials and finishes?

Yes, most extension builders in Westminster 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.