Extension Builders in Lewisham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.9 (19 reviews)

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Some of our top rated extension builders in Lewisham

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Duo Builders Ltd
Rating: 5 out of 5
Extension Builder in Lewisham
Duo Builders offers customers a high end service for all domestic building works. Our highly qualified team undertake Design, Build and Maintenance works on residential property in London and the surrounding area. Our wide range of services allows our clients access to an efficient quality service.
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Latest review:
Conversions - General- 26 Dec 2021
Overall, Duo Builders is good and I would recommend for any build work. Pros: 1. Committed to work and informed when not coming on any particular day 2. Had manpower allowing to add more hands if needed 3. Reliable people and nice staff / Team of young members 4. Does and completes work that was planned and agreed Cons: 1. Job took a lot of time than estimated as it was not thoroughly thought how the earth would be moved 2. Very hard to hold off the owner, its important for the client to be stay connected and informed. 3. Bit messy and site gets put of shape than original
Kastrati Bricklaying
Rating: 5 out of 5
Extension Builder in Lewisham
Kastrati brickwork offer the best quotes in brickwork,blockwork,patio slabs,blocks paving and etc
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Latest review:
Bricklaying- 2 Jun 2026
Work of excellent quality, fast & clean. Will use again
Tudor Holdings Group Limited
Rating: 5 out of 5
Extension Builder in Lewisham
We are a family business with direct employed tradesman. Our work is to the highest of quality, we always go that bit extra for our customers. We have always worked from recommendations, just completed a double storey side, rear ext, loft conversion in Carshalton. We specialise in structural works, refurbs, loft and property extensions. We can offer a full list of references and often, inspection of our work. We always aim to give full breakdown quotations and fixed prices when possible.
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Latest review:
Extensions- 18 Jan 2023
We highly recommend THG building solutions, they have built a double story extension for us, and from start to finish they were always on time, polite and professional on every aspect. Most importantly they delivered what was promised according to the initial budget and on time! No delays or surprises, just honest and reliable service. We have been approached by several neighbors to comment on how beautiful the extension looks and how quickly it was all done! Overall we’re very happy and glad that we chose Charles and his team as our builders.
Blueprint Builder UK
Rating: 4.7 out of 5
Extension Builder in Lewisham
I’m a local builder with over 25 years of experience, specialising in high-quality brickwork and home extensions. From start to finish, I take pride in delivering reliable, professional service and strong attention to detail. Whether it’s a full extension, garden wall, or any kind of brickwork, every project is completed to the highest standard. Customer satisfaction and honest workmanship are at the heart of what I do.
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Latest review:
Conversions - General- 3 Apr 2026
Where do I start. I’ve had more communication with Stuart in the last few months than I have had with anyone else. Our house has rare coloured bricks and I was absolutely shocked that Stuart managed to match the bricks perfectly. Stuart completed the work to such a high standard, we have arranged for him to come back to complete the inside of the extension also. Stuart quoted a really good price, turning up on time everyday. Honestly couldn’t recommend him enough and we will be using Stuart for all future work we intend to have done.
J.W.F Carpentry and Building
No reviews yet
Extension Builder in Lewisham
Hi I’m a highly skilled carpenter/joiner that has nearly 14 years experience, over the years those skills and meeting other professionals in the construction industry have allowed my business to evolve now taking on projects like Extensions, loft conversions,pitching roofs, landscape gardening, garden rooms,summer houses, kitchens and bespoke joinery, built in wardrobes and much more. I take a lot of pride in what I do and I’m not satisfied until the client 110% happy with my work.
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Mss Decoration
No reviews yet
Extension Builder in Lewisham
I am a reliable and skilled tradesman who takes pride in working cleanly, neatly, and to a high standard. From small repairs to larger renovation projects, I approach every job with the same care and attention to detail. My aim is not just to complete the work, but to ensure customers feel confident and satisfied with the result. With many years of hands-on experience, I provide practical, on-site advice that helps clients save time, space, and money. Before starting any job, I clearly explain the work involved and offer honest, transparent pricing. I offer a wide range of services including flooring installation, furniture assembly, door and window fitting, painting and decorating, basic plumbing and electrical work, as well as general home maintenance and repairs. I always work respectfully in my clients’ homes and leave the space clean and tidy. Customer satisfaction is my top priority, and I treat every property as if it were my own.
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Construction Bushi Ltd
Rating: 5 out of 5
Extension Builder in Lewisham
Hi We are a construction company working all over London We are part of the federation of master builders The work we do is, -Loft conversion -Extension -Refurbishe -Decorating -paving -garden
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Latest review:
Extensions- 25 Jan 2022
About halfway through the project now and I have only positive things to say about these guys. They are always on time and hard working, great communicators and pleasant to deal with. The work has been top notch and their quotations have been very fair. I have great confidence things will turn out exceeding my expectations. Will update upon completion.
Expert Maintenance London Ltd
Rating: 5 out of 5
Extension Builder in Lewisham
Expert Maintenance London LTD Keeping Your Home or Business Running Smoothly We fix electrical problems and more across London! Fast & Reliable: Need a repair or want to prevent future issues? We're here to help! Homes & Businesses: We serve both homeowners and business owners. Your Partner in Maintenance: We offer planned and reactive maintenance solutions. Call us today!
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Latest review:
Electrical- 14 Jun 2024
Prompt efficient friendly communication and detailed information resulting in identifying needed work which is planned for next week
HD Developments (London) Ltd
Rating: 5 out of 5
Extension Builder in Lewisham
HD Developments Ltd. For any building work down to even just maintenance, we cover every aspect of the building trade. A lot more information available through contact as we are new to my builder. Thank you.
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Latest review:
Very professional. Job completed in good amount of time. Communicated well with us throughout. Left the house/garden as they found it. Could not fault them and their work. Will definitely be using them for more work in the future! Thank you!
swift conversions ltd
Rating: 5 out of 5
Extension Builder in Lewisham
In Swift Conversions we have a mission, which is to provide the residents of Greater London with no hassle building services where all work exceeds expectations, meets deadlines and offers excellent value for money and we work very closely with our client to ensure complete customer satisfaction. We have many satisfied and returning customers because we provide the best and most comprehensive building services in and around Greater London. We pride ourselves on offering turn key projects including all permissions, certificates, planning, structure drawings and calculations. If you are looking for experienced and friendly building company you can trust then look no further than SWIFT CONVERSIONS. Whether its a query or a quote, shortlist us here and we will be in touch very shortly as soon as we have your contact details.
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Latest review:
We have worked with Alex and his team at Swift Conversions Ltd twice now—first for a house extension and then for a loft conversion and general refurbishment —and we wouldn’t hesitate to choose them again for our next project. From the moment we received the quote to the final completion, Alex was incredibly communicative, reliable, and always had a can-do attitude. Despite the challenges of fluctuating prices in the market, he delivered the project within budget and stayed true to his word. His professionalism and trustworthiness are second to none. If you’re looking for a builder you can rely on 100%, Alex is the one to go to. Highly recommended!
A&AK CONSTRUCTION LTD
No reviews yet
Extension Builder in Lewisham
Hello my name is sandeep kapoor and I am a dedicated builder with almost 12 years of experience starting my journey in this Industry in 2013.Over the years, I’ve honed my skills in various aspects of construction, from residential projects to commercial builds. I’m proud to be registered with Delta membranes , which reflects my commitment to quality and professionalism. I believe in creating spaces that not only meet my clients’ needs but also exceed their expectations. My approach combines meticulous planning, attending to details and focusing on communication in order to run projects smoothly from starting to finish.
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Essex building contractor ltd
Rating: 3.7 out of 5
Extension Builder in Lewisham
Essex building contractor ltd All building work
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Latest review:
Plastering- 7 Oct 2025
They didn't turn up
W&T Building Maintenance LTD
Rating: 5 out of 5
Extension Builder in Lewisham
WT Construction Service LTD. has been in business since 2002 and we`re specialists in design, planning, structural, building service, house extensions, loft conversions, joinery and renovation work covering whole of London.We guaranteed high quality finish on competitive price. We`re signed FMB,TRUSTMARK
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Latest review:
William and his company fitted a new kitchen for me and did the painting and wallpapering as well. They did a professional high quality job within a short time. I was absolutely satisfied with their service and their prices. They work fast, clear and precisely. I would highly recommend them to anyone.
ASAP RENOVATION LIMITED
No reviews yet
Extension Builder in Lewisham
We are ASAP Renovation Ltd. Our team has over 10 years of building experience in and around the capital, putting you and your project in the safest of hands. Our building expertise is backed up by our very own network of trusted suppliers, giving us the ability to deliver to a high standard on any task you require. From the construction of an extension or bathroom or even complete house renovations in London, there's no better choice to see your home dreams brought to life.
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CHIGWELL CONSTRUCTION SERVICES LIMITED
Rating: 5 out of 5
Extension Builder in Lewisham
When it comes to construction, renovation, and property maintenance, choosing the right team makes all the difference. At Chigwell Construction Services, we offer a complete, end-to-end service from electrical and plumbing work to full-scale refurbishments and 24/7 emergency callouts. With over a decade of experience, industry accreditations, and a strong local presence, we pride ourselves on delivering reliable, high-quality work tailored to each client’s needs. Whether you're a homeowner planning an extension, conversion, renovation, or a business needing reactive maintenance, we're here to get the job done right professionally, safely, and efficiently. Contact us and let our experienced team bring your vision to life.
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Latest review:
Bricklaying- 25 Apr 2022
Eddy & team has been absolutely fantastic. They have been extremely diligent with their work and delivered fantastic result within a very short period of time.
The Bellevue Interiors Ltd
Rating: 5 out of 5
Extension Builder in Lewisham
Recently joined - skilled competent traders with over 20 yr on site experience Professional clean on time. Happy to help with any of your projects: NEW BUILD, RENOVATIONS, EXTENSIONS, LOFT CONVERSIONS, KITCHEN, BATHROOMS, OUTBUILDINGS, CEILINGs, WALLS, FLOORS, DOOR ASSEMBLY, FLOOR LAYING, ELECTRICAL & PLUMBING INSTALLATION, BUILD IN WARDROBES, PLASTERING, PAINTING AND DECORATING, SHOP FITTING - design supply and install. Don't hesitate to ask if any questions.
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Latest review:
Conversions - General- 22 Jan 2022
Rumen and team did a fantastic job of converting our concrete slab garage into a very modern and posh office space well within our budget. If you see before and after pictures - the transformation is unbelievable. They were incredibly friendly and very patient listening, understanding and building on our requirements. I would highly recommend Rumen and his team from Bellevue Interiors.

3.9

Top rated Extension Builders

Our Extension Builders in Lewisham, are rated 3.9 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 Lewisham?

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

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

What are the hourly rates of extension builders in Lewisham?

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

Find extension builders in Lewisham with MyBuilder

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

Step 2: Compare different extension builders in Lewisham

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

Step 3: Hire Lewisham extension builders with confidence

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

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

What to ask a Lewisham extension builder before hiring?

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

An extension builder in Lewisham 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 Lewisham 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 Lewisham?

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 Lewisham 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 Lewisham 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 Lewisham

Can an extension builder in Lewisham help with planning permission?

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

Many Lewisham 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 Lewisham help with materials and finishes?

Yes, most extension builders in Lewisham 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.