Extension Builders in Westminster

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (17 reviews)

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Some of our top rated extension builders in Westminster

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Dreamland Construction ltd
No reviews yet
Extension Builder in Westminster
We the “Dreamland Construction Ltd” are a general building firm. We offer a full range of services from architectural and structural design to dealing with planing permissions and council applications. We only use reputable and qualified trades to complete our projects on time in the most professional way possible. We undertake a wide range of works including new builds, extensions, Loft conversions, refurbishments, Kitchens, bathrooms, plumbing, electrics and decorating.
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Fixer/dryliner
No reviews yet
Extension Builder in Westminster
Professional wall/ceiling fixer dryliner with 5 year experience
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TEMFOR DESIGN AND CONSULTANCY LTD
No reviews yet
Extension Builder in Westminster
We offer all relevant services under one roof for your extension, loft conversion and refurbishment projects. We work across the London area and offer competitive, affordable prices. We provide free design advice, full planning drawings, submitting the plans, and preparing any changes requested by the council. We also specialize in Extensions, Loft Conversions, Structural Alterations, and Full Refurbishments. Fully insured and all our work is guaranteed .
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Elemari LTD
Rating: 5 out of 5
Extension Builder in Westminster
We are an experienced team, working in the Construction Industry for almost 3 years. We normally undertake any type of work, carrying out work of any building, civil engineering, or engineering construction work( Demolition, Rebuilding, Building, Alteration, Loft conversions, etc). We are experienced in Flooring, Painting, and Decorating, Bricklaying, Carpentry, Plastering, and lots more. All our work is guaranteed and fully insured for your peace of mind.
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Latest review:
Painting & Decorating- 22 Mar 2021
work done very quickly and professionally . very friendly would recommend .
J N J Building Services LTD
No reviews yet
Extension Builder in Westminster
JNJ Building Services Ltd provides bespoke building and renovation services for homes in and around North & West London. We deliver innovative and intuitive solutions for our clients, offering a full range of services from design to completion. Our team works together to provide you with a hassle-free service from start to finish. We aim to minimise the disruption a building project can have on your home life with our commitment to punctuality and always working in a clean and tidy environment.
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Carpenters
No reviews yet
Extension Builder in Westminster
Carpenter peinter small electrical
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Jack Dagley
No reviews yet
Extension Builder in Westminster
HI
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CTU Interiors Ltd
Rating: 5 out of 5
Extension Builder in Westminster
I have over 15 years experience working on the tools. I started building work with my Dad when I was still in school and joined him professionally when I was 19, I am now 37. I started on suspended ceilings and plaster boarding walls and ceilings. Then I moved into more residential works doing extensions and refurbishments. I have a good team of guys around me that between us we can get any job done for you. Customer satisfaction is very important because you are as good as your last job!
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Latest review:
Plastering- 9 May 2016
Managed to fit me in at short notice and the plasterer did a thoroughly professional job and was pleasant with it.
A S Builders
Rating: 5 out of 5
Extension Builder in Westminster
We are a family run business in construction industry since 1990, initially started by my father and now his sons have joined the business and looking to revitalised the business through the use of up-to-date technology. We undertake all types of building work through our team of skilled labour from a small job up to New Build. Our most recent job was conversion of a detached property to 7 HMO's.
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Latest review:
Extensions- 29 Apr 2026
Heera, Jagthar and team was my first personal experience with builders. Let me tell you, it was a pleasure to have them do our porch and other renovations in the house. They are so courteous, hard working and provided a great service. Firstly, I had a comprehensively written quote breaking down all of the steps required. Heera then ensured to keep me in the loop of any developments/any changes of plan required, outlining the reasons why and options, making it easy to understand and work together to completion. Their finish was to a high quality and they would always go the extra step to ensure this. I highly recommend AS Builders for any job and will definitely use them again in the future, and would recommend to my friends and family also. If you are considering them, grab a free quote and go from there... That's what I did! Thank you AS Builders for our renovations!
Building Ideas
Rating: 5 out of 5
Extension Builder in Westminster
With over 30yrs construction experience, I can offer a friendly, bespoke Architectural design service. Offering creative solutions from initial drawings to planning ,full working drawings and structural engineering calculations. I have been working between architectural design services and high end residential project management projects so believe I can bring value ,creativity and ultimately a strong understanding of what is required to deliver a project.
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Latest review:
Architecture- 20 Nov 2016
This is the first time we are carrying out an extension work at our property. Sean worked with us from a very early stage, prepared the drawings, coordinated with the council and ensured that we received the building approval on time. He was always available to advice us (when requested) on design challenges, choosing installers and material choices which we found very helpful. We are very happy with his work and thoroughly recommend him.
Memsur Gorda
No reviews yet
Extension Builder in Westminster
High Standard Quality Care
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SANDAROV LTD
Rating: 5 out of 5
Extension Builder in Westminster
W h a t s A p p for instant quote Sandarov Ltd is one of the most reputable, reliable and professional companies in London. We offer first class domestic maintenance, building and refurbishment services across London and surrounding areas. We assure our costumers that all our work is carried out to the highest industry standard and is fully insured and guaranteed. At Sandarov, we only employ skilled and experienced tradesman who take pride in delivering professional building service.
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Latest review:
Landscaping- 19 Apr 2019
Thanks so much ! Very happy with the result, my garden has been completely transformed. Excellent job done to a high Standard. The team were courteous, helpful, flexible and professional throughout the job. Good communication and fair price. Recommended
TG Building Services
No reviews yet
Extension Builder in Westminster
NEW BUILD - EXTENSION - CONVERSION RENOVATION BUILD WITH CARE FINISHED WITH PRIDE - Plumbing - Electrical - Carpentry - Roofing - Ground works & Drainage - Brickwork - Architectural brick & Stone works - Designer Stairs - Decorative flooring & Tiling - New Kitchens & Bathrooms - Window Installation - Alarms & CCTV - Custom Fencing - Decking - Patios - Conservatories - Decorative paving & Driveways - Metal gates,Railings & metal Fabrication - External wall insulation
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Adecon Design and Build Ltd
No reviews yet
Extension Builder in Westminster
Adecon build and design Ltd offer the complete package from design to construction. We specialise in Residential and Commercial sectors. We are problem solvers, an integrated team of Engineers and high skilled builders with extend experience. Regardless the scale or complexity, all projects are important to us, at all stages.
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DMurphy Construction
No reviews yet
Extension Builder in Westminster
I have been working in the construction industry for 20 years now. During my time in the industry I have gained a lot of experience from all types of projects .. I specialise in basements, loft conversions, extensions, refurbishments & shop fitting. I have a great team of fully certified tradesmen & have references from of list of happy clients.
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Urastar Construction Ltd
No reviews yet
Extension Builder in Westminster
Interior and Exterior Works, Extension and Loft Conversions, Renovations, Refurbishment, Civil Engineering Consultancy
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4.1

Top rated Extension Builders

Our Extension Builders in Westminster, are rated 4.1 out of 5 based on 17 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.