Extension Builders in St James

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.2 (19 reviews)

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Some of our top rated extension builders in St James

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T.G & Sons Construction Ltd
Rating: 5 out of 5
Extension Builder in St James
I have worked in Construction since 1990. I have owned and run my own Business since 1998. We undertake projects from £1k to £2M. New Builds, renovations, Extensions, Loft Conversions, Conservatories, Outbuildings, full Refurbishments and Modernisations. We have all trades available and take on every aspect of the building trade. We also provide Architectural and Maintenance services. We Plan, Design, Build & Maintain.
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Latest review:
Restoration & Refurbishment- 6 Aug 2019
We are so pleased with the result. All the guys were friendly, helpful and hard working. They did exactly what they said and kept us fully informed. We should have done this years ago. I fully recommend them. A great bunch.
RK Improvements Limited
No reviews yet
Extension Builder in St James
We at RK Improvements are a family-run building company with over 35 years of experience delivering high-quality workmanship across all aspects of the building trade. Our reputation has been built on reliability, attention to detail, and a commitment to customer satisfaction. From renovations and extensions to general building works and complete property transformations, we take pride in providing a professional service from initial consultation through to project completion. We value long-term relationships with our clients and look forward to helping bring your next project to life. Head to our instagram page for past work. Search for @rkimprovements
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B.S.Contractors
No reviews yet
Extension Builder in St James
I'm Mechanical Technician by trade but working in construction industry 26 years. I used to do many aspects of building mostly in residential part of construction industry. I succesfuly run loft conversions company between 2003 and 2006.I work myself and I cooperate with other small traders like plumbers and electricians. I mostly do myself structural works, carpentry and joinery, tiling, and roofing. I do complete jobts from structural works to painting and decorating etc.
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Taya Construction Ltd
No reviews yet
Extension Builder in St James
Taya Construction Ltd provides a comprehensive service to home-owners looking to extend, repair loft conversion,Kitchen,Bathroom,Roofing ,home extension or refurbish their homes. Having worked in the building industry for 10+ years, we have extensive experience of managing and implementing projects of any size.
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I&A Construction Ltd
Rating: 5 out of 5
Extension Builder in St James
I&A construction Ltd has been trusted name in construction and renovation,including bathrooms, kitchens,interior and exterior work.
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Latest review:
Ion was done extension and refurbishment in the whole home.Speed and quality purposes were much pleasant given by the professional workers.
Daltrey builders
No reviews yet
Extension Builder in St James
Daltrey builders has been an established company for over 35 years, works consisting of home extensions, loft conversions, general maintenance and much more.
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Richard Wilson
No reviews yet
Extension Builder in St James
I’m an experienced and hands-on builder who takes pride in doing solid, reliable work. I’m confident working on all kinds of jobs—from small repairs to full builds—and I always aim to keep things running smoothly, on time, and to a high standard. I keep things tidy, and I’m not afraid to put in the hard graft to get the job done right.
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LBS LANGTON LTD
Rating: 5 out of 5
Extension Builder in St James
WE ARE A BUILDING, GROUNDWORKS AND DEMOLITION SPECIALIST COMPANY WITH 28 YEARS IN THE INDUSTRY. WE PRIDE OURSELVES ON DOING THE JOB PROPERLY AND ON TIME WORKING WITH CLIENTS TO GET THE VERY BEST RESULTS
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Latest review:
Groundwork & Foundations- 25 Jul 2025
Ralph and his team did a fantastic job making a concrete base for a summer house He was reliable, charming and did a few extra jobs while he was here ! Ralph,Charlie, Roy and Captain were a pleasure to meet and we recommend this company wholeheartedly
UKPC CONSTRUCTION LTD
Rating: 5 out of 5
Extension Builder in St James
Based in London, UKPC Construction delivers high-quality building services with a personal touch. We specialise in full house refurbishments, renovations, loft conversions, and structural alterations. With a skilled and reliable team, we take pride in offering tailored solutions to suit different needs and budgets—without compromising on craftsmanship or attention to detail. At the core of our work are trust, reliability, and a strong commitment to client satisfaction.
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Latest review:
UKPC Construction is by far the best company I have ever worked with, and I highly recommend them to anyone. Their team is not only courteous and professional but also a breeze to work with. They expertly helped me transform my jungle-like garden, and although I'm writing this review after some time, I'm now looking forward to discussing the extension project they initially designed with me. A big thank you to UKPCC, and I wholeheartedly endorse their services to everyone.
Bergin Surveying Ltd
No reviews yet
Extension Builder in St James
Over 30 years combined experience within the construction industry. Specialists in high end, contemporary and sustainable building. The management team consists of chartered Construction manager (MCIOB) Leading operations and a fully qualified Quantity Surveyor leading commercial. Looking for work including: - - New Build Projects - Extensions - Refurbishments - Loft Conversions - Basements - Maintenance contracts
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Clear-Cut Construction Group Ltd
No reviews yet
Extension Builder in St James
At Clear-Cut Construction, we pride ourselves on delivering exceptional customer care and complete satisfaction. Through clear communication and expert project management from day one to completion, we deliver every project to the highest standard. Making the entire process as smooth and stress free as possible for our clients. Partnered with our sister company Clear-Cut Carpentry, we cover all building and carpentry projects including but not restricted to: Loft conversions, extensions, refurbishments, out buildings, garage conversions, decking, garden rooms, bespoke wardrobes / storage, porches, kitchen fitting and media walls.
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B D construction
Rating: 5 out of 5
Extension Builder in St James
Have been a builder for forty years family run business with my son’s working with me.
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Latest review:
Brad and his company have done various jobs in my house including painting and decorating - refurbing my bathroom (which is amazing) and putting a new roof on my shed. He also does a lot of conversion and refurbing work for the Property Investment company that I work for and all to a very high standard. He is professional and hardworking and wouldnt hesitate to use his company for future work as well
Emil Lungu
No reviews yet
Extension Builder in St James
17 years Experience in Groundworks, foundation,extension,etc.
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Beni The Builder Ltd
Rating: 5 out of 5
Extension Builder in St James
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.
Rose Renovations
No reviews yet
Extension Builder in St James
here at rose renovations we are more than happy to come and meet our new customers and supply a free quotation for any building work. all building work can be carried out by us.
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PS Brick Block &Home Improvement LTD
Rating: 4.7 out of 5
Extension Builder in St James
All type of building works to high standards. - extensions - lofts - plumbing - electric - decorating - new build - patios - driveways
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Latest review:
Extensions- 4 Nov 2023
Overall me and my husband are very satisfied with the workmanship and with the final result of our my fake cladded garage door with the new aluminium framed window. The original garage was converted into a habitable room 7 years ago with only a rooflight to bring light into the room, which is now my husband's office and this new window will make a lot of difference therefore we are very happy with the finished work. The work was done very quickly, the builders turned up on time and they were very efficient and helpful, they took particular care when installing the composite slatted panels to the marine plywood. The main contractor Pawel Speiwak also came on site to inspect the works during construction. The quote was also very competetive, a good value for money. I would definetely use them again for any future work in my house and recommend them to other people.

4.2

Top rated Extension Builders

Our Extension Builders in St James, are rated 4.2 out of 5 based on 19 reviews from customers like you.

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What types of services are offered by local extension builders in St James?

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 St James 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 St James who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in St James?

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

Find extension builders in St James with MyBuilder

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

Step 2: Compare different extension builders in St James

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

Step 3: Hire St James extension builders with confidence

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

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

What to ask a St James extension builder before hiring?

Before hiring an extension builder in St James or extension building company in St James, 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 St James?

An extension builder in St James 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 St James 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 St James?

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 St James 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 St James 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 St James

Can an extension builder in St James help with planning permission?

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

Many St James 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 St James help with materials and finishes?

Yes, most extension builders in St James 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.