Extension Builders in Sydenham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (20 reviews)

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Some of our top rated extension builders in Sydenham

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Love Build Solutions Ltd
Rating: 5 out of 5
Extension Builder in Sydenham
In-house Electricans, undertaking full scope of projects. House extensions, loft conversions Carpentry Groundwork Electrical installation, alterations, repairs
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Latest review:
Conversions - General- 11 Jul 2019
Excellent work. Finishing is neat. Good communication through out the process. I knew what had been accomplished and what was to be done and when. Very respectful. Lovely team. Thank you guys 👏👏👌👌😀😀
Costello’s construction
No reviews yet
Extension Builder in Sydenham
Hello it’s Owen from Costello’s construction here, we as a company bring great service from the moment we start to the moment we finish. We cover all aspects of building from big projects to small projects supply top quality work which is always to a customers satisfaction as we like to keep our very good reputation up to standards also keeping our customers happy. The main thing for us as a business is that we always like to work with the customer closely to make sure they get the best job for the best price we can. Thanks Owen from costello’s construction
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Lrp brickwork
No reviews yet
Extension Builder in Sydenham
Hi there I am a solo trader I do private work on my own or if the job is big enough will take people on with me I am able to build any type of house /garden wall /porch / piers /extension anything you can think of i am more than capable. I normally undertake new house builds garden walls repaired and also rebuilt or building as new also extension any type of extra space that you require.
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NextGen Constructions Group Limited
No reviews yet
Extension Builder in Sydenham
This is NextGen Constructions Group Limited, we provide effective and efficient work to our clients, we have 13 years of building work experience, we also provide many services like extensions, new build, garage, loft conversion, etc.
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ECOFRAME DIRECT LTD
No reviews yet
Extension Builder in Sydenham
EcoFrame Direct specialises in the supply and installation of high-quality windows and doors, including uPVC and aluminium windows, composite doors, sliding doors, and modern glazing solutions such as rooflights and roof lanterns for residential properties. We work across London, Surrey, Kent, East Sussex and West Sussex, delivering carefully planned installations with a strong focus on quality, compliance, and customer experience. Every project is approached properly — from accurate measuring and specification through to professional installation and aftercare. Our team has extensive hands-on experience within the glazing and construction industry, and all installations are carried out in line with current Building Regulations. We work with trusted manufacturers and proven systems to ensure excellent thermal performance, security, and long-term reliability. We’re happy to advise on design, layout, glazing options, and energy efficiency, taking the time to explain everything clearly before work begins. Finance options are available where required, and all work is backed by product and workmanship guarantees for complete peace of mind. Free quotations, clear pricing, and reliable communication from first enquiry to completion.
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CPC Home Improvements Ltd
Rating: 5 out of 5
Extension Builder in Sydenham
We are a family run business and work very closely with the local authorities. We are affiliated with local regulators so you can see testimonials from previous jobs and rest assured on the services you will receive. We specialise in building, construction and home improvements
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Latest review:
Chris hung a number of prefabricated doors and door frames that needed adjusting. He promptly provided us with a detailed quote and his availability. He did a job on a Saturday which was great as we really need this job to be done as soon as possible. The job was completed quickly, the adjustment to the doors are practically not noticeable and the doors and frames look great. Chris and his helper were very helpful and did a great job for us. Will definitely us Chris's services again.
M&J
No reviews yet
Extension Builder in Sydenham
I am 29 years old. I really like working in construction. I have been working for 5 years in a company and now I want to do something for myself because I believe that I have all the necessary qualities and I want to start something for myself.
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JRS Builders Ltd
No reviews yet
Extension Builder in Sydenham
JRS Builders Company is a premier construction company that has been providing top-quality construction services for over a decade. With a team of highly skilled and experienced professionals, we are dedicated to delivering exceptional craftsmanship and outstanding customer service to our clients. Our commitment to excellence has earned us a reputation as a trusted and reliable partner in the construction industry. Whether it's a new home construction, renovation, loft coversion, extension, driveway & patio, bathroom & kitchen refurbishment or remodeling project, our team has the expertise and resources to bring your vision to life. Contact us today to learn more about our services and how we can help you with your next project.
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Build Better contractors ltd
New on MyBuilder
Extension Builder in Sydenham
Build Better Homes & Construction is a trusted local building company delivering high-quality workmanship at competitive prices. We specialise in garage builds, house extensions, home renovations, painting and decorating, door installations, insulation, and all aspects of general building work. We pride ourselves on being reliable, professional, and committed to completing every project to a high standard. Customer satisfaction, honest communication, and attention to detail are at the heart of everything we do. Whether you're improving your home or planning a larger project, we're here to help bring your vision to life.
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Get 2 go ltd
No reviews yet
Extension Builder in Sydenham
Hello, My name is Ash, and I am a builder with over 12 years of experience. I commenced my career with a roofing company, where I acquired essential skills and developed my own expertise. Over the years, I have engaged in various tasks, including wiring, plumbing, partitioning, and developing numerous skills. Today, I am capable of constructing new-build houses, as well as renovating, developing, and repairing existing properties. I am based in West London and commute to various locations, including Reading, Surrey, Southall, and Heston. Hiring me provides you with my extensive experience knowledge, including high-tech wiring and fixture repairs. From changing a basic lock to replacing an entire door, I am capable of performing a wide range of tasks, both large and small. I am eager to assist you.
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William rumball
No reviews yet
Extension Builder in Sydenham
Specialists in all brick and building work
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Sb landscapes
Rating: 5 out of 5
Extension Builder in Sydenham
Sb landscapes & groundworks LTD are a small friendly run business that pride ourselves with our very high standard of work offering a free no obligation quote. All works completed is fully guaranteed and covered by public liability insurance. Sb landscapes also offers waste disposal to and fully licensed to do so.
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Latest review:
Landscaping- 2 Oct 2025
Shay and his team knew what they were doing . Always on time . Listened to our requirements. Very happy with job .
Intercleanse Ltd
No reviews yet
Extension Builder in Sydenham
Intercleanse have been established for approx 15 years and undertake all aspects of building works. We undertake building works for Greggs the Bakers, Sussex Housing Group, Leaders Estate Agents, Main Car Dealerships - Motorline. We also carry out customer care works for many big house building companies i.e Ward Homes
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PS Brick Block &Home Improvement LTD
Rating: 4.7 out of 5
Extension Builder in Sydenham
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.
B.E Home Improvements
Rating: 5 out of 5
Extension Builder in Sydenham
Local building company. Loft specialists with a decade of experience. Why move out when you can move up? Complete loft packages available from plans to completion. Will work off your plans.
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Latest review:
Loft Conversion- 20 Jan 2026
I have chosen Byron and his company to complete my loft conversion. Job was completed within given time frame. Byron and the team were polite and hard working. During the building time, any issues found by myself were addressed and rectified as much as possible. At the closing weeks of my project, I have asked Byron to complete additional carpentry tasks. He found the time to accommodate my requests. Job had some messy stages but Byron was always trying to leave site clean as much as it was reasonably possible. Thank you for your work and I would be happy to hire you again in the future.
southcoast building services ltd
Rating: 5 out of 5
Extension Builder in Sydenham
I would like to introduce our company, Southcoast Building Services LTD, which has been successfully operating for the past 10 years. We are an established and trusted building company with an excellent track record of delivering high-quality work and maintaining strong customer satisfaction. We specialise in design and build projects for both commercial and domestic clients. Our services cover a wide range of construction works, from garden renovations, extensions, and loft conversions to full property refurbishments and new builds. We also undertake larger projects including care homes, supported living properties, and buildings adapted for special needs, where quality, safety, and compliance are essential. Our team is committed to providing reliable service, high standards of workmanship, and competitive pricing. We never compromise on quality and always aim to meet our clients’ requirements, deadlines, and budgets while maintaining clear communication throughout the project. We take pride in helping our customers complete projects of all sizes — from small improvements to complex developments — and we are always ready to assist with planning, design, and construction from start to finish. Sincerely, Erik Stankevics Southcoast Building Services LTD
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Latest review:
Hard Flooring- 5 Dec 2024
Erik kept me informed when he was running late due to traffic issues. He arrived and did a spendid job. Even hoovered the stair carpet when he was finished. We no longer have creaking stairs. Would recommend!

Top rated Extension Builders

Our Extension Builders in Sydenham, are rated 4 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 Sydenham?

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 Sydenham 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 Sydenham who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in Sydenham?

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

Find extension builders in Sydenham with MyBuilder

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

Step 2: Compare different extension builders in Sydenham

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

Step 3: Hire Sydenham extension builders with confidence

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

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

What to ask a Sydenham extension builder before hiring?

Before hiring an extension builder in Sydenham or extension building company in Sydenham, 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 Sydenham?

An extension builder in Sydenham 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 Sydenham 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 Sydenham?

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 Sydenham 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 Sydenham 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 Sydenham

Can an extension builder in Sydenham help with planning permission?

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

Many Sydenham 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 Sydenham help with materials and finishes?

Yes, most extension builders in Sydenham 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.