Extension Builders in Sydenham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (21 reviews)

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Some of our top rated extension builders in Sydenham

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Ionut
Rating: 5 out of 5
Extension Builder in Sydenham
Hello, I'm Ionut handyman, I also do tile and floor work, as well as paving and driveway work.
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Latest review:
Landscaping- 7 May 2026
“We recently had our landscaping redone along with new turf installation, and the results were excellent. The team was professional, punctual, and paid great attention to detail from start to finish. They completely transformed the garden, leaving everything neat, tidy, and looking amazing. The new turf was laid perfectly and has already made such a difference to the overall appearance of the space. Communication throughout the project was clear and friendly, and the workmanship was top quality. Highly recommend to anyone looking for reliable and skilled landscapers.”
Craft of London Ltd
Rating: 5 out of 5
Extension Builder in Sydenham
Craft of London are an established building company, specialising in design and build projects, creating bespoke interiors and homes. Our workmanship is of the best standard in London for either small, medium or grand designs.
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Latest review:
Extensions- 3 Sep 2013
Kel and his team worked on my single storey extension with bifold doors and glass roof. He also did some landscaping in my garden, replacing the fencing and installing a raised patio with cedar battens to the side. Overall I was very pleased with the work Kel did. He is a good communicator and frequently visited the site to keep on top of the work. Kel was happy to discuss requests and was flexible with design changes. The bulk of the work was completed on time with just some minor snags remaining, but the finish is excellent. It's been a long and stressful journey, but it's been easier with the friendly support and professional approach Kel has taken to his job. I'd be happy to recommend Craft of London and provide a reference on request.
Schwartzbuild Limited
Rating: 5 out of 5
Extension Builder in Sydenham
COVID SAFE (all materials for protection on work)WorkSafe!We are a Qualified Company , based on quality ,8-10workers fully qualified (gas safe, electric) with 10 years experience!Full Refurbishment ,Kitchen Refurbishment,Bathrooms installation,Painting & Decorating,Flooring,Plumbing,Tiling,Electrical work,Boiler installation, Gas certified,Double Glazing,Plastering,Extensions,Loft Conversion,New Built.We satisfied our costumers every time!Our reputation matters!Free Quotes!24/7for our Costumers!
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Latest review:
Bathroom Fitting- 31 Jul 2023
Good professional service
Red & Black
Rating: 5 out of 5
Extension Builder in Sydenham
Hi My name is Irdi Me and my team we are taking any job
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Latest review:
Carpentry- 27 Oct 2024
Amazing work ethic, very polite and punctual and did an amazing job. Definitely recommend and use again. Thank you.
M&S Building Services
No reviews yet
Extension Builder in Sydenham
I am a sole trader builder for 20 years experience.I covered most Aspects in building extension loft conversion and repairs pvc windows and doors kitchen bathroom painting and decorating and many more
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ADJ Builders Limited
Rating: 5 out of 5
Extension Builder in Sydenham
Hello ..my name is Alfred. I, have over 12 years of experience in building site. Perfectionist in my work and ability to guarantee customer satisfaction. Hard working and ensures all deadlines and targets are met. A good eye for detail, precise and accurate at all times and will complete all work to the highest standards.My experience shows in the finish, with no visible streaks. Polite friendly and helpful.
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Latest review:
Painting & Decorating- 6 Oct 2022
Very pleased with our choice. We initially got four quotes from different builders, most of them were terrible at communicating apart from Alfred. He was very easy to work with, responsive and very careful with our brand new house. His team was hard working, tidy and fast. They completely renovated our garden from removal of old decking and gravel to setting up new fences, levelling and turfing the ground. They also removed our old kitchen, partition wall and carpet, as well as did jobs like plastering, building a wall and set up lights and shelves. We’ll surely have him back soon to work on other jobs.
RnRbuilders
No reviews yet
Extension Builder in Sydenham
I have been in this business for years now. Within those years gained valuable skills that has enabled my business to grow graciously within the building trade. No job is too small or too big from changing a lightbulb to building an extension all our within our capabilities. We always put the customers first.
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LLOCKBUILDING
Rating: 4.9 out of 5
Extension Builder in Sydenham
"PUTTING THE TRUST AND RELIABILITY BACK INTO BUILDING" At Lock Building London, we specialise in helping you grow your vision by creating the dream home you've always imagined. We understand that your home is a reflection of your aspirations and lifestyle. Our team of skilled craftsmen will turn your ideas into reality, expanding your vision one brick at a time. From innovative designs to quality craftsmanship, we ensure that your home improvement project aligns perfectly with your vision and lifestyle. With our expertise, your dream home will not only meet but exceed your expectations, allowing your vision to flourish and your dreams to come to life
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Latest review:
Conversions - General- 15 Apr 2026
Luke and Diti are both amazing guys for this project. Honestly speaking they aren't the cheapest quote, but they are definitely beyond expectations. Luke was the only builder who gave a full transparent quote on each item and what was needed for the conversion. Really quick work and good planning because I have 2 cats and they did everything with enough people onsite to minimise the time. Speaking of work, it is good, we kept in communication and they were always happy to explain and adjust slightly according to my concern/question. Leave this comment after the work has been done for few months and everything is solid.
RM constraction
No reviews yet
Extension Builder in Sydenham
I am a building contractor with many years of experience. I can build your house extension, a garage, conservatory, a loft and any wall. I also work with renovations, so if you would like to finish the extension inside out or simple changing the look of your bathroom or kitchen look no further.
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VDK Developments Ltd
No reviews yet
Extension Builder in Sydenham
VDK are known locally for being trustworthy and reliable. We excel at bringing your project in on time and within budget. Specialist in .... Extensions, New Builds, Loft Conversions, Full Refurbishment, Internal & External Decorations
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Azure Notions Limited
Rating: 5 out of 5
Extension Builder in Sydenham
Azure Notions Ltd based in South East London with a geographical coverage across the whole of London, South East and home counties. Azure Notions are a highly respected contractor delivering new build, refurbishment, project management and design and build solutions to public and private sector clients. Azure Notions specialises in the education, high quality residential and commercial sectors across which the company has developed an extensive and diverse portfolio.
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Latest review:
Fencing- 22 Jun 2023
Didn't end up using them however they took time to come and quote me and was very professional.
BUILDING ANDREW & GREG LTD
Rating: 5 out of 5
Extension Builder in Sydenham
Welcome to our profile, we are a company specializing in all kinds of renovation and construction works, all the works shown in the photos are made by us, we are diligent and open to all kinds of innovative ideas of our clients, in our opinion there are no impossible things to do, you have to Just think and take action, all the best A&G
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Latest review:
Bathroom Fitting- 2 Mar 2021
Greg and Andrew are nice guys and got the job completed to a good standard.
FSB Company (UK) LTD
Rating: 5 out of 5
Extension Builder in Sydenham
FSB is a well-organized contracting company with a team experienced in large-scale development projects with leading UK construction companies. Based primarily in London, we offer a variety of self delivered services, including complete extensions, and conversions, small works, structural alterations, steel work installations, ground work (foundations, drainage, concrete sub and superstructures), hard landscaping and paving and soft landscaping. We manage our sites carefully and have a digital site management tool kit. Our fully managed service connects skilled tradespeople with experienced construction management directly ensuring attention to detail that begins with our Contractors Proposals and continues through to practical completion and aftercare.
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Latest review:
Extensions- 17 Nov 2025
Freddie, Kaz and Dan are a great team. I felt they were friendly and professional throughout. Any slight niggles were discussed and solutions found, quickly and professionally. They were respectful and went out of their way to get on with all the neighbours. Over all I would say they are a team of very nice people, who care about what they do and take pride in achieving the result their clients are after.
De Winter’s Property Services LTD
Rating: 3 out of 5
Extension Builder in Sydenham
Welcome to De Winter’s Property Services LTD – we proudly cover all aspects of work, both domestic and commercial. Whether it’s your home or business, our experienced team delivers high-quality, reliable solutions tailored to your needs. I’m Aidan De Winter, director of De Winter’s Property Services. I’ve been a fully qualified plumbing and heating engineer since 2014, with extensive experience across domestic and commercial sectors. Over the years, I’ve built strong knowledge in many areas of the construction industry and a trusted team of skilled tradespeople around me. Based in South London, we’re happy to take on jobs across all of London and beyond. Why choose us? With a reputation for quality, honesty, and reliability, we deliver every job to the highest standard—on time and within budget. No job is too big or too small, and we treat every project with the care it deserves.
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Latest review:
Plumbing- 24 Jan 2026
I did hire Aiden De Winter for the job. He came and inspected the problem and sent us a link to purchase a new pump. I paid him for this work. We purchased a new pump, and he decided not to finish the job and come back to install the pump. This caused a lot of problems as he was the second plumber I hired for this job, and now we have to find a third plumber! What a waste.. how hard is it to come back and fit the pump! Do not use this company at all costs!
gurtej building works
No reviews yet
Extension Builder in Sydenham
hi
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KB construction solutions
Rating: 4.5 out of 5
Extension Builder in Sydenham
.Kitchen Fittings .Loft Conversion .Brick Work/ Skimming .Plastering/Plumbing .Wall & Floor Tiling .Gardening/ Fencing .Bathrooms .Wood Flooring .Extensions
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Latest review:
Extensions- 24 Apr 2021
Kujtim, working with his glazers, created a bespoke porch with a glass roof just as we asked. We were impressed with the finish of the internal plastering and Kujtim was able to come to our rescue one evening when we became locked outside the newly installed porch door. Although the project took longer than was anticipated we are happy with the quality of the finished product.

Top rated Extension Builders

Our Extension Builders in Sydenham, are rated 4 out of 5 based on 21 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.