Extension Builders in Lewisham

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (18 reviews)

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

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 Lewisham

3177 Results

Sort by:

adam lloyd construction ltd
Rating: 5 out of 5
Extension Builder in Lewisham
At Adam Lloyd construction we specialise in high end refurbishments but we also undertake small works and maintenance from decorating to landscaping we have excellent tradesmen in-house
Get in touch
Latest review:
This carpenter is a plywood maestro! My wardrobes are a testament to their craftsmanship – sturdy, stylish, and a definite upgrade from my previous cardboard chaos. Would highly recommend for a wardrobe transformation that's as solid as it is delightful. ⚒️👌 Top notch, class A stuff 👍🏻
TRIADA BUILDING LTD
Rating: 5 out of 5
Extension Builder in Lewisham
Triada Building LTD is a family-run construction company with over 15 years of experience specialising in house extensions, loft conversions, renovations, and new builds. We are committed to delivering high-quality workmanship, completed on time and within budget. From the initial consultation through to project completion, we focus on clear communication, reliability, and attention to detail to ensure a smooth and stress-free experience for every client. Our skilled team of qualified tradespeople takes pride in providing a professional, friendly, and dependable service, with customer satisfaction at the centre of everything we do.
Get in touch
Latest review:
Extensions- 23 Aug 2023
On schedule and to budget, Ibrahim and his team from Triada Building Ltd delivered a very high standard on this project. Despite poor weather (Summer of 2023) and some issues with 3rd party contractors, access for concrete pour, skip delivery etc. his team worked each stage of the project to plan keeping me informed and showing great level of craftsmanship. I was after a simple workshop build that would compliment our house and he did not try to over sell options I wasn't interested in. Very happy with the result, and would recommend. Thank you.
REVOSPACE CONSULTING LTD
Rating: 5 out of 5
Extension Builder in Lewisham
Revospace – Building Better Spaces Revospace delivers high-quality refurbishments and property improvements across London and surrounding areas. With years of hands-on experience in residential projects, we understand how to combine strong workmanship with structured project management to deliver results on time and within budget. We have worked on full refurbishments, kitchens, bathrooms, flooring, carpentry, decorating and general building works. Our background in site management means we don’t just complete jobs — we plan, coordinate and manage them properly from start to finish. Based in London, we operate across Greater London and Essex, and are happy to travel for the right project. Our strengths include attention to detail, reliable scheduling, transparent pricing and clear communication throughout every stage of the job. We respect your home, keep sites clean and ensure work is completed to a high standard. At Revospace, we believe in doing things once and doing them properly — no shortcuts, no hidden surprises. Quality work. Clear communication. Professional delivery.
Get in touch
Latest review:
I recently had a full kitchen installation carried out and I’m really pleased with the results. From start to finish, the work was completed to a high standard and everything was done with great attention to detail. The installer was professional, punctual, and easy to communicate with throughout the project. Any issues or questions I had were dealt with quickly and clearly, which gave me confidence that the job was in good hands. The workmanship is excellent – everything is level, neatly finished, and exactly as discussed. They also kept the workspace tidy each day and made sure everything was cleaned up properly once the job was complete. The kitchen looks fantastic and has completely transformed the space. I would happily recommend them to anyone looking for a reliable and skilled kitchen installer, and I would definitely use them again for future work.
Shemeck Builder
Rating: 5 out of 5
Extension Builder in Lewisham
We are a small team working in building industry for many years. We are experienced in all aspects of building like: Kitchen fitting, bathroom fitting, carpentry, tiling, plastering, painting and much more. Any project, any idea we can help you and you will be happy.
Get in touch
Latest review:
Bathroom Fitting- 26 Jun 2022
Excellent recent bathroom project delivered by Robert and Shemeck. Everything delivered on schedule. Very tidy and considerate of working in a family home. Competitive rate, great attention to detail, completely trustworthy. I'd recommend anyone to speak to them about your project.
Done By Tom Ltd
Rating: 5 out of 5
Extension Builder in Lewisham
Welcome to Done by Tom – we offer a completely bespoke design and build service for the London private sector. If you’re looking for clever, stunning and energy-efficient construction as well as interior design, we are it. At Done by Tom, we’ve come up with a unique success formula when it comes to memorable design and construction: combining the interior design, architecture and construction process into one seamless dream to deliver according to our clients vision.
Get in touch
Latest review:
Fireplaces & Flues- 13 Nov 2017
i was so so happy with the service completed by done by tom. I had a really urgent last minute job and they were able to complete all the work to a really high standard and with a great price. I would trust them to do any building work in my house and am happy to have found a trusted builder for future works. Would recommend to anyone
SBL
Rating: 5 out of 5
Extension Builder in Lewisham
We are a family run business with over 40 years experience in this industry. We do all aspects of Landscape gardening. We take great pride in customer satisfaction and work with you to achieve your perfect garden.
Get in touch
Latest review:
Bricklaying- 10 Jun 2026
Turned up in time. Did a great job. Will definitely use again.
BKFS LTD
Rating: 5 out of 5
Extension Builder in Lewisham
Work undertaking includes; Joinery, Kitchen and bathroom installation. Electrical NIC EIC approved contractor Gas safe Plastering, Painting, Tiling, Specialised in Bespoke wardrobes. Granite, Marble and Quartz Worktops. Wet room
Get in touch
Latest review:
Tiling- 3 Jan 2025
Job completed in a very friendly and professional manner. Highly recommended. Once again, thank you Raghed!
Prodec Construction ltd
Rating: 5 out of 5
Extension Builder in Lewisham
With over 16 years experience our reputation has developed very soundly as a specialist building contractor. We work on many types of projects including domestic houses, health care sector, and housing developers. Our service is designed around delivering the highest standard and quality.
Get in touch
Latest review:
Painting & Decorating- 18 Jun 2025
Martin has done an excellent job for us. He is professional, polite and helpful.
Marinrupa construction ltd
No reviews yet
Extension Builder in Lewisham
I have 25 years experience as a painter,there's no impossible job for me,always I finish my task in time and I have one of the best price in th area
Get in touch
SLK-Services Limted
Rating: 5 out of 5
Extension Builder in Lewisham
At SLK Services Ltd, we specialise in Loft Conversions, Extensions and Home Refurbishments. We also provide Home Maintenance (including Electrical, Plumbing and Carpentry), and Installation Work. We cover all of South East London and North West Kent, and offer a free, no obligation estimate service. We pride ourselves on offering quality construction, with a service you can rely on.
Get in touch
Latest review:
Kitchen Fitting- 17 Feb 2026
Very professional and efficient. Would definitely use them again in the future.
AL Construction
No reviews yet
Extension Builder in Lewisham
Hi, I’m Alex. I run a small team specialising in general construction and property refurbishments across South East London and beyond. No job is too big or too small — from repairs and renovations to complete refurbishing projects, we handle it all with attention to detail and reliability. If a project requires specialist skills, I work with a trusted network of subcontractors to make sure every part of the job is done to a high standard. I take pride in delivering quality work, on time, and keeping my customers happy.
Get in touch
G S ELECTRICS
Rating: 4.7 out of 5
Extension Builder in Lewisham
G S Electrics are NAPIT approved Domestic electrical contractors who provide flexible, planned, reactive electrical services that are professional, trustworthy and high quality. We provide our services to domestic properties throughout London. With extensive knowledge gained throughout university, having an BEng in Electrical and Electronic Engineering. I can put both theoretical and practical knowledge into use and provide the best solutions for technical problems.
Get in touch
Latest review:
Electrical- 25 Feb 2020
Gurprith called me immediately and the job was booked in for the next day. He was speedy and efficient and helped with another electrical issue at no further cost. I would definitely use his services again and not think twice to recommend him.
FLYNN properties
Rating: 5 out of 5
Extension Builder in Lewisham
With over 10 years experience and always producing high quality finishes. From kitchens, bathroom to extensions and always with a good positive happy attitude. let us work with you to design and achieve exactly what you’re looking for.
Get in touch
Latest review:
Tiling- 7 Aug 2023
Paul was great. Easy regular comms. Arrived early on the day and fit me in as best he could. Straight to it, great work, very professional and sorted out some other problems as they were discovered. Talked me through options and did what was asked to a very high finish. Would highly recommend and use again.
Edi
Rating: 5 out of 5
Extension Builder in Lewisham
Hello my name is Edi.I am a general builder with 10 years experience.Renovation,Extension,Roofing, Kitchen,bathrooms,Wood Flooring,Gardening,Driveway etc
Get in touch
Latest review:
Helpful; will hire again
MJV Extrem Construction Ltd
Rating: 5 out of 5
Extension Builder in Lewisham
MJV Extrem Construction specializes in refurbishments, extensions, loft conversions, new builds and complicated structural alterations.We are ready to help with any of electrical,plumbing and Gas desigh and installations included all aspect of different heating systems and UFH systems. We also undertake smaller projects like kitchen/bathroom Installation’s ,gardening and all your property needs from A to Z. Fully insured. Free quotations
Get in touch
Latest review:
Plastering- 20 Jun 2025
Rerendering, repairing and redecorating front of house. Vic and his team were excellent. Highly skilled, respectful and trustworthy. Job was completed to a very high standard at a fair price. Couldn’t be happier. Will definitely use him again and would not hesitate to recommend him to others.
Future advanced building contracting uk. London
Rating: 4.5 out of 5
Extension Builder in Lewisham
I am doing all buildings works
Get in touch
Latest review:
Joinery & Cabinet Making- 20 Feb 2026
Great Service at Short notice. Will use again. Than

4.1

Top rated Extension Builders

Our Extension Builders in Lewisham, are rated 4.1 out of 5 based on 18 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 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.