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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WHG Consultancy Ltd
Rating: 5 out of 5
Extension Builder in Westminster
Award winning builders in South West and Central London. We offer a complete range of design and build services for residential and commercial customers include new build developments, renovations, refurbishments, reconfigurations, extensions, bathroom and kitchen fitting, as well as bespoke carpentry, joinery and electrical work. We think your property is as individual as you are and help you to achieve your ideal home through our highly skilled & experienced team of designers and builders.
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Latest review:
Restoration & Refurbishment- 28 Dec 2015
I did quite a bit of research before choosing Battersea Builders. They didn’t come in with the cheapest quote but I never base my choice on price alone. And it wasn’t miles above the other quotes I got. Instead, I chose them because they ticked a lot of boxes including a) good independent reviews, b) a dedicated PM, c) qualifications, d) quick responses, e) a decent website etc. Overall, they did a fantastic job. The quality of the work and finish is really good. The PM, Tommy, was really helpful throughout and the team was very polite and conscientious. They were also on site every day as promised and didn’t play that old builders trick of getting the job and then going offsite to secure another job elsewhere (resulting in the deadline being missed). Was it perfect? No, but then not many projects are. I have a few minor comments including the fact there was a misunderstanding about the quality of bathroom cupboard I needed so the original quote was insufficient and costs had to be increased half way through the project. Despite this issue, Tommy did his best to keep the extra costs down. One other niggle was that I asked them to keep all the manuals and instructions for all the fittings but they threw them out. Not a big deal but quite annoying. Overall, it wasn’t cheap but I would use them again because the work was done to a high standard and the team were a pleasure to work with.
"Surudo" Building & Decorating
Rating: 5 out of 5
Extension Builder in Westminster
We are team of experienced builders provides professional execution of small, medium and larger projects, all types of refurbishment, maintenance and building services for private and business customers in London and surrounding areas. All of our work is carried to the highest standards.
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Latest review:
Bathroom Fitting- 3 Sep 2020
He is very professional and has done a good job on refurbishing my bathroom.
Full Circle Renovation Ltd.
Rating: 4.9 out of 5
Extension Builder in Westminster
Comprehensive project management in London. We specialize in complete refurbishment projects. In the last 15 years our team has been involved in a number of property renovation jobs, having accumulated extensive knowledge of the trade and valuable contacts with specialist craftsmen, suppliers and other professionals. We can help with the whole process from planning to delivery of final finishes. Call us today for a free no-obligation initial consultation, followed by a detailed cost estimate.
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Latest review:
The refurbishment of my small one-bedroom flat took approximately 2.5 months. I compared several builders before starting the project. The price was not the cheapest and the proposed timeline was not the shortest. Though Radilina seemed to be a good project manager and liked that she works on a fixed price for each work.
SDS CARPENTRY & BUILDING SERVICES LTD
Rating: 5 out of 5
Extension Builder in Westminster
SDS CARPENTRY & BUILDING SERVICES LTD is a team of qualified builders with over 15 years of experience and have all the skills necessary to take on board any building project at an extremely high standard. Yes, we’ll add real value, save you time and effort, keep disruption to a minimum and manage the project from design to final-fit. Our clients choose us because we have exceptional customer service and can deliver projects on time and within budget.
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Latest review:
Carpentry- 9 May 2020
I had a parquet floor laid and was very pleased with the result and attention to detail. Sergiu worked very hard and was a pleasure to deal with.
Onyx Construct Limited
Rating: 5 out of 5
Extension Builder in Westminster
We are a multi-trade construction company operated in domestic sector and we are able to full-fill any building requirement. The scope of projects we have delivered in the past spans from smallest jobs like kitchen or bathroom fitting to extensions, house refurbishments or loft conversions.The majority of our previous clients were extremely satisfied with high standard and quality of work. If you are looking for professionals builders with reasonable prices - you are on the right profile !
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Latest review:
Extensions- 29 Nov 2023
We had the most fantastic experience with Sarunas. He was highly professional from start to finish and completed the work to the highest standard. We extended our project significantly once we realised how excellent he was and he has now renovated our whole home over an 18 month period. He was able to guide us through the process and help us make key decisions which made the experience smooth and efficient. He is extremely skilled in all aspects of building, has high attention to detail and is a pleasure to have in your home! I couldn't recommend him higher and look forward to having him back in future to convert our loft!
KUBEL LTD
Rating: 5 out of 5
Extension Builder in Westminster
Welcome to KUBEL LTD, your trusted partner for all your construction and renovation needs. We specialise in building and renovating extensions, roofs, and gardens to transform your home into your dream space. With our expertise and dedication to quality, you can trust that your project will be completed on time and to your satisfaction.
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Latest review:
Wonderful and honest. Excellent finish.
WS Building
Rating: 4.8 out of 5
Extension Builder in Westminster
I am Builder with 30 years experience in all kind of building projects.Together with my team we can provide for you a complete building service and help with advice in any aspects of building works. We specialise in: conversions, extensions, renovations, reconfigurations, basements, lofts, new kitchens and bathrooms, flooring , doors, gardening, demolition works, roofing, steel installation, plastering, painting and decorating and all others of building works included electric and plumbing.
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Latest review:
Restoration & Refurbishment- 10 Nov 2025
Professional and on time, recommended
Buildstead Development Ltd
Rating: 5 out of 5
Extension Builder in Westminster
Our team at Buildstead has over 25 years of experience in the construction industry covering a wide range of project types. We truly are your "one-stop shop" when it comes to your project. From design to build, we pride ourselves on our integrity, the quality of our work and the working relationship we enjoy with our clients. With full project management included, you will be kept up to date at each step along the way ensuring complete peace of mind.
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Latest review:
Kitchen Fitting- 5 Nov 2020
An incredibly positive experience from start to finish. I found Robbie and team were hard workers, very likeable and provided brilliant results. Comms throughout were excellent. With Robbie happy to discuss the job over the phone beforehand and put our minds at ease. A big shout out to the team for undertaking this work during COVID. We understand the pressures this places on our tradespeople and we thank Robbie and his team for their diligence and commitment to wearing masks in our home and working safely. A brilliant experience.
Pawel
Rating: 5 out of 5
Extension Builder in Westminster
I am part of a dedicated two-man company with over 15 years of experience in the construction industry. We specialize in a wide range of construction projects, from extensions and loft conversions to garden transformations, as showcased in the photos below. When you choose me, you’re not just hiring a builder—you’re investing in exceptional craftsmanship, meticulous attention to detail, and a commitment to exceeding your expectations. I take great pride in my work, and my recent projects speak for themselves. I’d be delighted to share examples and even arrange visits to completed sites, where you can see the quality of my work firsthand and hear directly from satisfied clients. Your satisfaction is my priority, and I am committed to bringing your vision to life with professionalism and care. I look forward to discussing how I can help make your project a reality. Best regards,Paweł
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Latest review:
The job was to remove a stud wall with an archway between my kitchen and hall. Pawel was excellent from start to finish. He was good to communicate with before, and answered my questions fully. He turned up on time, was very neat and kept the noise down. He did a great job and cleaned up afterwards. I’d recommend!
Belgravia Property Solutions Limited
Rating: 5 out of 5
Extension Builder in Westminster
Belgravia Solutions is a trusted provider of professional handyman and building services, based in Belgravia. We specialise in a wide range of trade services, including painting and decorating, carpentry, bathroom and kitchen refurbishments and most skilled work needed in a home or office. Our mission is to make your life easier by delivering high-quality work on time and within budget. With an experienced team and a commitment to customer satisfaction, we’re here to help with projects and works of any size.
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Latest review:
Had an emergency when a pipe burst in the flat above causing flooding damage. Struggled to find a responsive option when I luckily game across Belgravia Property Solutions. They promptly inspected my flat, got me an estimate, and executed the works with a multidisciplinary team - walls plastered and painted, electrical repaired, floor recarpeted. Works were finished within one week of the first phone call. BPS will be my first call next time.
Torc Groundworks Ltd
Rating: 5 out of 5
Extension Builder in Westminster
Torc Groundworks & build take a professional approach to all groundworks, including piling, foundations, underpinning, drainage, RC Works, Brickworks, Paving, driveways and Landscaping.
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Latest review:
Groundwork & Foundations- 9 Nov 2023
Very professional, finished the job to a great standard.
Belhus Construction Ltd
Rating: 5 out of 5
Extension Builder in Westminster
Welcome to Belhus Construction Ltd, your premier design and build company serving the vibrant landscape of West London. With a steadfast commitment to excellence and innovation, we bring your architectural visions to life with precision and style. As a trusted name in the industry, Belhus Construction Ltd specializes in delivering bespoke construction solutions tailored to meet the unique needs of our clients across residential, commercial, and industrial sectors. From concept to completion, our dedicated team of professionals harnesses years of expertise and a passion for craftsmanship to redefine the skyline of West London. At Belhus Construction Ltd, we transform dreams into reality, one project at a time.
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Latest review:
Extensions- 12 Feb 2021
Micka is very professional and responsive to all my queries. Work finished to a very good standard.I am happy with my new side extension. I would use Qualityloft again.
Ifa construction ltd
Rating: 5 out of 5
Extension Builder in Westminster
House extension, lofts conversion, house refurbished, and new build
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Latest review:
Restoration & Refurbishment- 2 Jul 2023
AJ was thorough, friendly and thought things through. I would recommend him.
ASAR PLUMBING AND BUILDING
Rating: 5 out of 5
Extension Builder in Westminster
I am a qualified plumbing heating engineer and General builder, i have learned my trade working for a plumbing / building company for 15 years. i have also been Nescot College for four years where i gained my qualification. I am hard working person, honest, trustworthy and take pride of my job. Customer satisfaction is my top priority.
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Latest review:
Extensions- 17 Mar 2024
Agim and his team were great - communicated what they would do at each stage, the timing, materials needed etc., no major surprises. The building is quite old and wonky in places so they had to work with that and the finished result looks great. Very happy and have would recommend Agim again!
Qualitas Build Ltd
Rating: 5 out of 5
Extension Builder in Westminster
Quality service assured to all customers. Insured. All work guaranted quality work to domestic and commercial customers. Call us today for a free quotation. Work history Over 19 years of experience working all over London and sorrounding areas delivering excellent finish. We take on general building work, extensions, loft conversion, roofing, renovation, new build, tiling, Plastering.
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Latest review:
Handyman- 23 Nov 2024
Excellent, recommend this guy. He will do the jobs and do it well!!
REWORKS LONDON LTD
Rating: 5 out of 5
Extension Builder in Westminster
Our team comprises eager on-demand workers, with years of experiences, who deliver exceptional services to both residential and commercial customers all around London. Whether you need a painter that will not miss a single mark, or an electrician that assists you in emergencies, we will make sure to send you our specialized and competent workers for all your needs.
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Latest review:
Gas Work- 11 Dec 2020
Repaired and very happy!

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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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.