Extension builders in St James

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.6 (20 reviews)

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Some of our top rated extension builders in St James

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B.z.brothers ltd
No reviews yet
Extension Builder in St James
At Bzbrothers, we are committed to transforming spaces and structures with a focus on quality and precision. extensive experience in construction, design, and landscaping to each project, ensuring innovative solutions that are both functional and visually appealing. From the solid foundations required in groundwork and bricklaying to the creative designs in landscaping, we handle each project with meticulous attention to detail. We cater to both residential and commercial clients, offering everything from comprehensive renovations to bespoke installations. Driven by a passion for excellence and a commitment to client satisfaction, we strive to exceed expectations at every turn. We believe in building lasting relationships with our clients, providing reliable service and superior results that make your investment worthwhile. Explore our services and discover how we can make your next project a success. At Bzbrothers, we don’t just build or renovate spaces—we enhance them, ensuring every project is a testament to our dedication and your vision.
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CLEMPTON BUILDING SERVICES
Rating: 5 out of 5
Extension Builder in St James
We are based in Crawley, West Sussex and we cover a radius of 80 miles. We offer domestic and commercial building services. Fully insured. We not only want to ensure you are completely satisfied with the end result, but we would also like you to enjoy the process along the way. Whatever your budget we offer a comprehensive tailor-made service. All our own full-time staff is industry professionals with years of experience behind them.
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Latest review:
Bathroom Fitting- 10 Jul 2023
Zolton was very professional and completed all the work in timely manner. Kept job very tidy all the time and no rush at all.
London Homes Construction Ltd
No reviews yet
Extension Builder in St James
All building works undertaken: single extension, double extension, loft conversion, refurbishments from private works to commercial projects. Family business who you can trust with several years of experience. We live by our motto: treat other people as you would like to be treated yourself.
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N Drummond
Rating: 5 out of 5
Extension Builder in St James
Hi, we are a small family run business where quality is paramount,we have over 40 years experience in all aspects of building work
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Latest review:
Carpentry- 10 Feb 2026
did a great job and a great service would definitely use again
tops developments
Rating: 4.9 out of 5
Extension Builder in St James
We undertake all type off building work, plumbing, heating, gas works,kitchens, bathrooms, refurbishment, extension, and small jobs. With over 8 years experience in industry, work warranties, qualified professionals. Our subcontractors and employees are professionals with experience. We are looking forward to hear from you. Thank you.
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Latest review:
Gas Work- 23 Dec 2025
Friendly, professional and fair with good communication. Would recommend
A&s builders and contractors
No reviews yet
Extension Builder in St James
We are team of qualified and professional tradesmen covering all aspect of building work, full house wiring, plumbing, bathroom renovations, painting and decorating, extentions and even double glazing. Our team is very professional and customer satisfaction is our first priority.
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R&J Quality & Decorating Ltd
Rating: 5 out of 5
Extension Builder in St James
R&J Quality & Decorating Ltd is a Basildon‑based home improvement and decorating business established in 2019, offering a wide range of services including house refurbishment, decoration, plumbing, electrical work, bathroom tiling and general renovations. The company focuses on quality workmanship and customer satisfaction, aiming to transform living spaces with meticulous attention to detail and a comprehensive approach to home improvement. �
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Latest review:
Hard Flooring- 2 Oct 2026
Really happy with the flooring work from Remus. He fitted engineered wood flooring in my home office, including removing and disposing of the old carpet, fitting new boards, laying plywood underneath, removing and refitting new skirting boards and painting the room. It wasn’t a straightforward job as the existing floor was uneven and there were gaps around the old skirting but Remus dealt with these and left everything looking neat and well finished. The end result looks excellent and has made a big improvement to the room. Remus was easy to deal with, timely,helpful, and clearly cared about getting the finish right. I’d definitely recommend him to anyone looking for a decorator.
LDN LUXURY BUILD LTD
No reviews yet
Extension Builder in St James
We are a local building company, based in Hemel Hempstead offering design and high quality services. We have more 10 years of experience in the construction industry. We do refurbishments, extensions, loft conversions and many other building services.
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Haycroft Contracts Ltd
No reviews yet
Extension Builder in St James
Haycroft Contracts are a friendly, honest and reliable building company. With years of experience, always willing to offer advice and guide you through your project.
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JCH Home improvements & landscaping
Rating: 5 out of 5
Extension Builder in St James
Local builder with 20 years experience in the construction industry. From extensions to bathrooms, windows, doors, patios, kitchens, fully landscaped gardens. Please get in contact for your free no obligation quote
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Latest review:
Decking- 14 Jun 2022
James Hynes of JCH Home Improvements have just refurbished our decking area. We thought it was a straight forward job, just to renew the decking and a tidy up BUT the original wood was so rotted the whole area had to be renewed. Joists, upright timbers etc We are thrilled with what James has done, so much more work than anticipated but the end result is fantastic. Would thoroughly recommend JCH Home Improvements and we will be using the again.
FS Vale management Limited
New on MyBuilder
Extension Builder in St James
As a family run Business with over 30 years experience in the construction industry specialising in the groundwork and Civils sector our aim is to combine our experience and expertise to create value whilst completing our works to the highest standard. Having worked on a variety of projects in size and value we have the know how to complete any groundwork and building projects. Specialised areas include -foundations -site clearance and enabling works -drainage works -278 works -basements -concrete slabs -Paving and driveways -roadworks Our company ethos is to exceed client's expectations by providing clear concise advice to our clients with the view to create a positive experience throughout the process of your construction project. We have gained years of experience working as a standalone contractor or as part of a larger team for managed contracts. We operate throughout Buckinghamshire, Berkshire, Hertfordshire, Surrey and west London. Full surveys and costings will be offered with every enquiry as well as material testing, project documentation. All works are fully insured and guaranteed.
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As2 construction Ltd
No reviews yet
Extension Builder in St James
AS2 Construction Ltd , where craftsmanship meets innovation. As a leading construction company, we specialize in delivering high-quality projects tailored to meet your vision. Our dedicated team of experts ensures excellence in every detail, making us your trusted partner in construction solutions. Explore a seamless blend of expertise, reliability, and creativity with AS2.
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ER Sumit Kundu
No reviews yet
Extension Builder in St James
I am Civil Engineer with 8 years of experience in Indian market currently gaining experience in UK. I have recently completed my Master's Degree in structural Engineering from Brunel University (September,2024).
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Oakview Developments
No reviews yet
Extension Builder in St James
We have over thirty years experience in the building trade on a wide range of projects consisting of: Extensions Loft conversions Landscaping Carpentry Brickwork Kitchens Bathrooms
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ERW Building Services
Rating: 5 out of 5
Extension Builder in St James
General builder covering all aspects of exterior and interior works. This includes groundworks from footings, drainage, paving, to conversions and interior maintenance and decoration. With over 20 years of proven experience using quality materials and tradesmen. My aim is to work with my customers to provide a service that fits to their plan and budgets giving sound advice on what would work best to give a lasting finish.
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Latest review:
Conversions - General- 17 Mar 2019
Elliott has to be the best decorator/ builder I have used. On time with works and no lies or excuses!!! After posting my job he call me within 30 minutes to arrange a visit. This was the following day. When Elliott arrived he understood my requirements and saw my ideas and advised when he thought from his experience, would work better. He was very polite and professional. I needed the work done within 2 weeks due to carpet being laid. He completed the works within 7 working days. The works involved, Removing a wall, Removing all woodwork, Boxing out pipes, Plastering, New coving, New skirting, New architrave 2 doors, Building an under stair shelving unit, Moving a socket, sky cables, internet box, Removing radiator, Painting of all new plastered walls ceiling and woodwork to my chosen colours. I was even able to get him to squeeze in some additional works. This was creating shelves in my airing cupboard upstairs and boxing out pipes in my hallway. Elliott’s communication throughout the works was great. Even if he was unable to get round my house he would let me know at his earliest opportunity. Very very tidy during works. I have a 3 year old and Elliott made sure it was left safe every night. The finished works are to a high standard and he even popped back to do a bit off snagging on a Saturday morning. When I say snagging it was a few paint marks, re-laying my old carpet and dropping my keys off. I will be using Elliott in the future.
Nobel LUX LTD
No reviews yet
Extension Builder in St James
We have 10 years experience in fitting kitchen and furniture for brands as Wren kitchen, Schimdt and other brands furniture and kitchen. As we are doing any extra jobs . We are doing most of the building works. We doing as well extension and refurbishment of your dream house .
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4.6

Top rated Extension Builders

Our Extension Builders in St James, are rated 4.6 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 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.