Extension builders in St James

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.6 (21 reviews)

Easily find verified St James Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in St James.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in St James

3754 Results

Sort by:

Majesticbuild
Rating: 3 out of 5
Extension Builder in St James
At Majestic Build Construction Company, we don’t just build structures; we craft environments that blend seamlessly with nature. With a passion for creating breathtaking outdoor spaces, our landscaping services are designed to enhance the natural beauty of any property, be it residential, commercial, or public. We specialize in: • Custom Landscape Design: Tailored to suit your vision and the unique features of your land. • Hardscaping Solutions: Including patios, walkways, retaining walls, and water features that add depth and functionality to your outdoors. • Sustainable Landscaping: Focusing on eco-friendly practices and native plant selections for a greener future. • Comprehensive Maintenance: Ensuring your landscapes remain as vibrant and immaculate as the day they were created. With a dedicated team of professionals and a reputation for excellence, Majestic Build Construction Company transforms ordinary spaces into extraordinary outdoor experiences. Let us bring your landscaping dreams to life!
Get in touch
Latest review:
Bricklaying- 17 Dec 2024
They initially gave a fair price and a date and timeline that fitted with our needs. Subsequently they over ordered on the bricks so we had over 100+ expensive London bricks left over and they under ordered on sand and cement.(Luckily the shop took them back but we had to deliver them there) The job took far longer than they had said although the poor weather did not help much which could not be helped. The worst was that the wall was finished so that the latch of the gate could not be fitted as the wall was a bit too long! The wall looks good but their customer service and time given for job as well as ordering materials needs some improvements. They are pleasant workers, not rude in speaking
ritz builders uk ltd
Rating: 5 out of 5
Extension Builder in St James
Ritz Builders UK Ltd can take care of any property renovation or house extension, from complex double basement developments to a new builds. Our builders have worked on various type of properties across UK, giving them a new light and converting them into modern and contemporary living spaces. Our professional construction team, who come supported by a dedicated workforce, are well regarded by commercial and residential property developers.
Get in touch
Latest review:
The builder was reliable and dependable. Work was neat and to taste .
chins design and build
No reviews yet
Extension Builder in St James
We undertake all manner of building and renovation work, having worked on a vast variety of jobs a professional, seamless and multi-trade service, for all domestic projects from , extensions, renovation, refurbishment and to fully finished houses, all tailored to meet our clients’ specific requirements. professional construction company covering South London and Greater South London.
Get in touch
B.CANI Limited
Rating: 5 out of 5
Extension Builder in St James
Reliable, fully insured construction company delivering high-quality workmanship across residential and commercial projects. We cover all aspects of construction including extensions, renovations, loft conversions, kitchens, bathrooms, roofing, landscaping and full refurbishments. From design to completion, we manage every stage with clear communication, fair pricing and attention to detail. Customer satisfaction, safety and deadlines are our priority.
Get in touch
Latest review:
Extensions- 11 Jan 2018
This was our first project, and we were exceptionally fortunate to find Bujar. We're actually getting tired of hearing our family and friends tell us how lucky we are and how amazing he sounds. One of the most honest, trustworthy, and genuine people I've ever met. If I had a problem, he'd be one of the first people I'd call! In fact I did last week and he came to the rescue :) His team were all friendly, polite, conscientious and very tidy. They worked around us as much as they could, always making sure we had access to what we needed which sometimes meant it took them longer to work. Bujar is a perfectionist and is so proud of what he does, he made sure everything was done to a high standard - the estate agent who came round after we were done was impressed! His prices are very fair (better value than other quotes we got and much less time). We couldn't believe it was done in the 3 months he said it would take, and we managed to fit in a few extra bits and pieces after that. He was so helpful throughout, took all project management on and didn't bother us unless an important decision needed to be made. He drove us around all over the place to sort kitchens, bathrooms, etc. and gave us really helpful advice throughout the process. Highly recommend him and his team. I can't imagine ever wanting to look for another builder unless I had to - something that is quite common amongst Bujar's clients. We are extremely pleased with everything about our new house.
Daniel Copil
Rating: 5 out of 5
Extension Builder in St James
Hello everyone, we are proud problem solving builders who covers all areas of building works: extensions, kitchens, bathrooms, painting and decorating, tiling, flooring, plumbing, electrics, carpentry, gardening, fencing, bricklaying, paving... Everything you need in one team for your peace of mind!
Get in touch
Latest review:
Tiling- 16 Jun 2026
Daniel is a hardworking, precise and clean worker. He worked tirelessly for a week, doing a fantastic job with everything we asked of him: we now have freshly painted walls, new carpets and a completely refurbished bathroom! He’s on time, polite, keeps noise to a minimum and he’s very pleasant to have a chat with too. I’ve already recommended him to my close circle very gladly.
Mad property care Ltd
Rating: 4.4 out of 5
Extension Builder in St James
Professional builder with many years’ experience, I get the job done. In the 16 years spent in construction I picked the skills required to get the work done without the need of another specialist. I’m a carpenter by trade but I’m also a plumber & so much more, I’ve dealt with all kinds of trades, building control, engineers, architects, electricians.
Get in touch
Latest review:
Conversions - General- 16 Apr 2024
Job completed. Very professional and efficient service. Would highly recommend.
Bricklayer
Rating: 5 out of 5
Extension Builder in St James
Small bricklayers gang ready for work : Face brickwork,Block work,Garden wall's any design you like. Pointing weather struck,flash. Old stock brickwork,New build brick work, Extensions.
Get in touch
Latest review:
Extensions- 1 May 2024
Vaidas and team were great. Got here early and worked solid until late. Built a 5x4m extension and done a great job. Looks good and has been approved by building control. Highly recommend.
GUANGDONG GEKE ELECTRONIC TECHNOLOGY CO., LTD
No reviews yet
Extension Builder in St James
We are a solar photovoltaic panel manufacturer in China. We design, supply and PM renewable energy project worldwide for customers requested. Kindly drop us email at geket@yahoo.com for further discussion. God bless you
Get in touch
Nero Building Work LTD
Rating: 5 out of 5
Extension Builder in St James
Our team is highly professional within the building trade.We have the ability to manage projects of all sizes and complexities. We are very dedicated to each project ensuring that it is completed at the highest standards within the timescale and the budget allocated. We are specialised: •new build/ houses • Extensions • Refurbishments • Loft Conversions
Get in touch
Latest review:
Extensions- 1 Mar 2021
Work completed to the highest quality. Real eye for detail and very reliable. Best decision I took was to work with Nezir on this project. Completed in a timely manner and perfect communication throughout. Fairly priced and knowledgeable in all aspects of renovation and construction, adding real value to my property.
Renaldo Dungu
No reviews yet
Extension Builder in St James
Hi , my name is Renaldo I’m a professional painter and decorator more than 3 years in industry I undertake big and small projects interior and exterior painting work, for more information please get in touch for a free quote .
Get in touch
Crown plastering & building
Rating: 5 out of 5
Extension Builder in St James
A family business run by father and son with over 30 years experience combined. Being a family business our work is our reputation and therefore all works carried out are to maximum potential! Clean, realiable and great pride is taken leaving customers happy and without hesitation for recommendations. Specialising in plastering, rendering, traditional Italian Venetian polished plaster and all aspects of building works also undertaken.
Get in touch
Latest review:
Bathroom Fitting- 20 Sep 2017
We hired Luca for a job that involved a variety of work across our entire flat. Being totally new to renovation work and having been stung by other builders, meeting Luca was a breath of fresh air – he was friendly, helpful and honest. Luca did an great job for a very reasonable price. He’s fairly new to contracting bigger jobs, but he’s got a lot of previous experience as a tradesman and his plastering in particular was perfect – we’ve had loads of compliments on the quality of his walls and ceilings. He was always on time, always communicated with us fully, and was a pleasure to have around the flat. He made a real effort to keep disruption as minimal as possible and was very patient with us about stuff needing to be moved from one place to another. It wasn’t the easiest job and there were a couple of problems and extras, but Luca takes a lot of pride in his trade and worked extremely hard to keep us happy. We had a couple of plumbing issues arise but he went well above and beyond to resolve them, coming back for 2 days after the job was due to be finished to make sure that everything was working properly. This is far more than we expected, and we did really trust that Luca wasn’t the sort of person that would leave anything unfinished. We’re so chuffed that we met Luca and with the excellent work he did, and would love to work with him again. Luca is going to go on to big things, so if you get the chance to hire him now, we'd recommend him without hesitation.
TSO Building Services
Rating: 5 out of 5
Extension Builder in St James
Hi, we are a family business and have been renovating and maintaining properties for over 9 years. From changing sockets, hanging light fittings, hanging doors, painting and decorating (in&out)to full bathroom or kitchen installations and extensions we are here to help.
Get in touch
Latest review:
Bathroom Fitting- 26 Jan 2019
Would certainly highly recommend! Trustworthy company I would gladly use again for other jobs. Keep to the quote. High quality job from start to finish, hard working guys who get the job done in great time! Had a new bathroom built in my large bedroom and tiled downstairs bathroom and kitchen. Happy with end product.
MLCC
Rating: 5 out of 5
Extension Builder in St James
We offer quality works at competitive prices. We are a small team of professional builders with over 12 years of construction experience. Whether you are looking for painting a room or bathroom refurbishment or building a new extension - we can take care of it all. Please contact us today for a free no-obligation quote.
Get in touch
Latest review:
Painting & Decorating- 27 Apr 2018
Claudiu and his team did an excellent job renovating our 2 bed flat in Bushey. He did a great job on the laminate flooring in particular. Installed coving, skirting, painted walls/doors/radiators, installed new light fixtures, and assembled furniture. Will definitely work with him again. In fact, I hired him back to do our bathroom next week!
Bondentreprise Ltd
No reviews yet
Extension Builder in St James
professional approach to various types of work. qualitatively and reliably.
Get in touch
MYD Studio London Limited
Rating: 5 out of 5
Extension Builder in St James
MYD STUDIO London limited is a Design-Led Architectural and Planning consultancy focusing on New Build ,Extensions, Loft Conversions, Change of use and Flat conversion projects in different Boroughs in London. Whether you are looking to increase the size of your home, make the most of its current size through an internal alteration, or gain planning permission in order to increase its value before selling, we will help you to produce a planning application to meet all of your expectations.
Get in touch
Latest review:
Extensions- 6 Aug 2022
Majid has been great in producing drawings for our rear extension. He's also helped explain the whole build process to us from design, building inspection, and building. We received our drawings in under 10 days from the initial consultation and site visit. Majid was accomodating and was able to visit the site on weekends for the initial consultation. Always a pleasure to deal with and has been easy to reach over the phone or email. Would highly recommend Maji and MYD Studio London to anyone looking for an architect.
L7 Enterprises Limited
Rating: 5 out of 5
Extension Builder in St James
We have carried out many refurbishment, extension and loft conversion projects for our own properties and now we have a good strong team we are looking to do more for the general public in between our own projects. Experience wise, across the team we have fully refurbished over 50 properties between us and always strive to leave a happy customer. For more details of our work, client testimonials & our team
Get in touch
Latest review:
Carpentry- 24 Jun 2016
Excellent job polite team very helpful, prompt & efficient and follow up very good. Would certainly use again and recommend

4.6

Top rated Extension Builders

Our Extension Builders in St James, are rated 4.6 out of 5 based on 21 reviews from customers like you.

Quality screening

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 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.