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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AJ Partners Ltd
Rating: 5 out of 5
Extension Builder in Lewisham
We are family business working in different levels of building industry. Refurbishment, supply and fit and installation service. Carpenter, Joinery, Tiling, Plumbing, etc. Supply or supply and fit, refurbish and new build We completed various projects in London and surrounding areas We listen to our clients needs and liaise with you throughout your project to ensure that the project finishes on time and on budget. Trades 15 Years of experience and good reviews leads our work.
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Latest review:
Kitchen Fitting- 7 Jun 2020
We liked Alex from the first meeting and the first impression was spot on. Alex did an amazing job on our kitchen, which was half initiated by another tradesman. He reviewed the work and fixed many issues, always explaining and communicating well. Our kitchen had to be adapted and had some non standard cabinets but Alex was able to do all the additional features we asked for and with a great result. He also recommended some design changes which we agreed to and love. He finished the work, reviewed everything and signed off, always with a smile which is a plus. Definitely highly recommended and we will call him again in the future for sure. Thank you Alex!
J E Hughes Builders Ltd.
No reviews yet
Extension Builder in Lewisham
J E Hughes builders ltd is a company that undertakes all aspects of building work, we have over 10 years of experience in extensions, new builds, internal alterations and fit outs and we are happy to take on any job.
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JG builders
No reviews yet
Extension Builder in Lewisham
Kiwi living in London in south west London with +10 years experience can do a range of jobs from loft conversions to hanging tv brackets. Loves to get stuck in and help clients get there dream result
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Portclean Services Solutions Ltd
No reviews yet
Extension Builder in Lewisham
At Portclean, we specialize in a wide range of cleaning and professional services to meet your needs. Our offerings include: Office Cleaning: Our expert team provides consistent, top-notch cleaning services to keep your office spaces immaculate. We tailor our approach to fit your schedule and requirements, ensuring a clean and productive work environment. End-of-Tenancy Cleaning: Experience the power of our thorough deep cleaning services. Whether you need a fresh start in a new space or want to leave your rental property spotless, we deliver exceptional results that exceed expectations. Builders Cleaning and Handyman Services: Trust our skilled professionals to handle all aspects of post-construction cleaning and general maintenance. We tackle debris removal, dusting, repairs, and more, providing comprehensive solutions for a pristine workspace. With years of 15 experience, a dedication to quality, and a commitment to customer satisfaction, Portclean is the trusted choice for all your cleaning and handyman needs. Contact us today and discover how we can elevate your workspace with our unique and professional service
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Ab brickwork & building services ltd
No reviews yet
Extension Builder in Lewisham
A fully qualified bricklayer by trade, with over 10years experience in extensions, conservatories and all landscaping work. (Driveway, patios, turfing, fencing)
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JG
Rating: 5 out of 5
Extension Builder in Lewisham
More than 15 years of experience in general building from groundwork’s to french polishing. Working for years with one of the biggest North London construction company as a carpenter supervisor. I feel content of my good work outcome. Would like to work weekends and evening times!
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Latest review:
Carpentry- 15 Jun 2026
Really great experience! Friendly, helpful and available at short notice. Did a great job. Super happy with everything. Would definitely hire again.
Misha Sup
No reviews yet
Extension Builder in Lewisham
Motivated trainee bricklayer with a strong work ethic and eagerness to learn.
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Adam Daniel LTD
No reviews yet
Extension Builder in Lewisham
Cliden Construction LDN is a small, London-based construction company specialising in high-end domestic refurbishments. With a passion for quality and attention to detail, we work closely with discerning clients across London to transform their homes into exceptional living spaces. Whether it’s a complete structural refurbishment, a luxury kitchen or bathroom renovation, or a full interior overhaul, we pride ourselves on delivering outstanding results that exceed expectations. As a boutique construction firm, we offer a highly personalised service. You will deal directly with experienced professionals who care about every aspect of your project — from the initial design consultation through to the final finishing touches. We only use premium materials and trusted specialist tradesmen to ensure a flawless finish every time. At Cliden Construction LDN, we understand that your home is one of your most important investments. That’s why we are committed to the highest standards of craftsmanship, reliability, and client satisfaction on every project we undertake. We look forward to the opportunity to bring your vision to life.
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Upright Building Services ltd
Rating: 5 out of 5
Extension Builder in Lewisham
Hi, my names Sam, I am a multi trade builder and qualified carpenter. I have 12 years experience as I have been in the building industry since leaving school. I am the owner of Upright Building Services Ltd which specialises in Extensions, Loft Conversions, Renovations and everything in between. I pride myself in being a trustworthy and hard working tradesman with an eye for detail.
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Latest review:
Carpentry- 8 Feb 2021
Sam done a wonderful job of my doors for a very reasonable price as well !!! Definitely will use him in the future
DM Builder
No reviews yet
Extension Builder in Lewisham
I am a general builder and have 15 years experience in the trade. I have worked for large companies which have enabled me to gain a vast knowledge in many areas. I have completed large refurbishments to smaller projects. I work with qualified Electricians and plumbers so am confident that I can complete tasks.
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Sean contracting LTD
No reviews yet
Extension Builder in Lewisham
I like things well done.when I see the people ar happy I'm happy to
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PM GAS LTD
Rating: 4.6 out of 5
Extension Builder in Lewisham
Our professional heating and plumbing engineers are nearby and ready to assist. We are fully certified and gas safe registered company. Boiler Replacement,Types: Plumbing, Heating, bathroom fitting, comercial gas works also carried out.
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Latest review:
Gas Work- 7 Oct 2025
This provider took my money but never attended my property or carried out the work (a report on already completed plumbing works). All he had to do was write a report to say that the repair works were complete. On the day he was due to attend he never let me know he was on his way or that he wanted to come early morning. Then he went to a nearby apartment a few streets away and said he had attempted to come so it was my fault. Then he said he would do the report remotely I must send him pictures, after sending him pictures he said he wanted to visit site so we were back to him making an appointment which of course he really did not want to do. 3 months later no sign of my money or a very simple report that a child could have done. He also has not returned my money (£120). I can now see why he insisted he be paid in advance because he is a time waster with no confidence in his own abilities hence payment in advance, so that when he disappoints the customer he can still get paid.
Jaches construction
Rating: 5 out of 5
Extension Builder in Lewisham
Architectural Engineering drawings. Construction. Ground and first floor Extensions. Loft conversions. Interior design. Painting and decoration. Boiler installations.
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Latest review:
Conversions - General- 28 Jul 2023
I had Tony in to do my ballastrade, he also ended up doing a lot more work including my driveway, have recommend him to several people and all have used him, highly recommend
M Pepa LTD
No reviews yet
Extension Builder in Lewisham
Everything you are interested in for your home, your offices, your stores. You will find the support and quality that we as a company offer to our customers, for us, it is the most profitable It's great when our customers are happy, Thank You
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FSB Company (UK) LTD
Rating: 5 out of 5
Extension Builder in Lewisham
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.
Sinco Services Limited
Rating: 5 out of 5
Extension Builder in Lewisham
Sinco Services Limited Hi my name is Nikolay, I been working as a builder for 15 years from painting to extensions. I have completed high quality work including large scale rear extension from foundations to finish with top quality. Our including bathrooms, wet rooms, laminating, tiling, plastering and complete renovations. Although I am based in North London, I can travel all around London I have my own team who is reliable and consistent completing work a to z.
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Latest review:
Plastering- 20 Mar 2025
I hired Nikolay and his coworker to build a small walk in closet. The job was done properly and they delivered what was promised in the estimated time. They also left the house tiny and clean. It was a nice experience. The price was also really good.

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.