Extension Builders in Southwark

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 3.8 (17 reviews)

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Some of our top rated extension builders in Southwark

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Master Builders Developments Ltd
Rating: 4.6 out of 5
Extension Builder in Southwark
Newly Joined My Builder, We are a established Building firm specialising in Extensions, Loft Conversions and Refurbishments, we undertake commercial projects along with substantial size constructions. Our team over all elements of construction.
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Latest review:
Roofing (Pitched)- 26 Sep 2024
Keep this company as first choice for ur building work.
City Building & Design
Rating: 5 out of 5
Extension Builder in Southwark
Team of builders, decorators,Tilers, electrician and plumbers offering general building work In central & North london. We offer Bathroom & Kitchen installation. Painting & Decorating. Tilling & plastering Wiring & electrical work Plumbing and central heating General building maintenance
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Latest review:
Bathroom Fitting- 24 Apr 2024
Really happy from start to finish. Hamid and his team were a pleasure to deal with. Super polite and considerate, excellent communication and we’re really happy with our new bathrooms and closets. Would definitely recommend and use again for our next project.
S & S Builders
Rating: 5 out of 5
Extension Builder in Southwark
Hi my name is Stephen and I have 30 years building experience specialising in extensions and loft conversions I do 1 job at a time and I am on site every day. I have extensive knowledge of structural engineering I also carry building insurance .and i am a member of the National federation of builders.
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Latest review:
Extensions- 18 Jun 2025
Steve and his team were excellent throughout. Turned up on time every day, very reliable. Excellent attention to detail and great pride in their work. All areas of building work undertaken to a very professional standard. We had new bathroom fitted, new fence and handmade shed, lean-to rebuilt from scratch with new roof, patio doors, new flooring, plastering, outside patio. Very happy with the work. Good value for money. Highly recommended would use again without hesitation.
A abrahim
Rating: 5 out of 5
Extension Builder in Southwark
Im professional bricklayer with 12 year experience I work with the companies and I work with my own the 12 years I can do all design brick and block
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Latest review:
Bricklaying- 3 Jun 2026
Reliable, On Time, Clean & Tidy.
E.M.Morgan & Sons Property Development
Rating: 5 out of 5
Extension Builder in Southwark
E.M.Morgan & Sons are General Builders, established since 1979. Specialised in all the General Building Works We are members of the F.M.B. All our works carries our Builders Guarantee Certificate. Look no further if you need a professional work carried out.
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Latest review:
Extensions- 9 Mar 2023
Currently pricing my project. Excellent response and recommend
REVOSPACE CONSULTING LTD
Rating: 5 out of 5
Extension Builder in Southwark
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.
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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.
Exquisite Design & Build Ltd
Rating: 5 out of 5
Extension Builder in Southwark
Welcome to Exquisite Design & Build, a premier construction company based in London. We specialise in delivering exceptional construction work and Architectural & Structural Design services to both Commercial & Residential Clients. Our comprehensive offerings include the full range of Building & Refurbishment Works, Planning Applications, 2D & 3D Design and Visualisations, Structural Design, Project Management and detailed Estimates. “Exquisite” - carries the implication that every detail of our work, is of rare and appealing excellence. We transform your vision into reality with precision and professionalism, ensuring a seamless and satisfying experience from concept to completion. Our company is TRUSTMARK registered company, a Government-endorsed sign of consumer protection for home improvements, repairs, renewable energy installations and low energy retrofits. We are also member of the FEDERATION OF MASTER BUILDERS.
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Latest review:
Exquisite Design and Build recently reworked and refurbished our new, six bedroom detached house, having previously completed a kitchen extension at our last property. Andrei’s work is of an incredibly high standard. He shows great attention to detail throughout the entire process. Not only does he execute the work beautifully, but he offers great design ideas and and suggestions. With regard to contracting, pricing and invoicing, Andrei provides clear and accurate documentation which gives us complete trust in his ability to work within our budget. Andrei and his team are an absolute pleasure to work with; hardworking, punctual and tidy. I have recommended them to three other friends, all of whom chose to work with him on their extension/refurbishment projects and were equally delighted with the results. I would not hesitate to recommend Exquisite Design and Build to anyone, regardless of the size and complexity of their project.
Muro Construct ltd
Rating: 5 out of 5
Extension Builder in Southwark
Muro Construct Ltd is a family-owned construction company dedicated to providing personalized, high-quality building services to homeowners and businesses. With a focus on attention to detail, reliability, and clear communication, we bring your vision to life with every project we take on. Whether it’s a home renovation, a commercial build, or general repairs, we take pride in delivering exceptional craftsmanship and ensuring that every job is completed on time and within budget. At Muro Construct Ltd, we treat every project as our own, offering a hands-on approach and building lasting relationships with our clients.
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Latest review:
Tiling- 11 Jun 2025
I hired for just for bathroom and toilet tiling, However due to the diligence, attention to detail, honesty and work ethics of Muro construct, I hired him to decorate my entire house, this includes everything form stripping wallpaper and painting, floorings, tiling, fixing doors, putting up all my new furniture including a very compl bunk bed for my children room. This builder works really hard and time efficient. He has helped transform my house into a luxurious living space and I am not exaggerating when I say that the price is very fair, I have had three times the quotes for less the quality. I will be using the builder for future jobs.
Acelux Ltd
Rating: 5 out of 5
Extension Builder in Southwark
We offer a wide range services from a minor works, extensions to a complete refurbishment. We are Electrical Certified Gas Safe Certified Trust Mark Government approved Contractor. Considerate Construction Member A family run business
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Latest review:
Acelux did a brilliant job on our office refurb. We were very happy with the work completed as well as the service. They were able to come out of office hours during the bank holiday weekend, finish on time, and even stopped back in on Tuesday to make sure we were all happy with the works.
W.A. Brown Builders LTD
Rating: 5 out of 5
Extension Builder in Southwark
I have been in the building industry now for over 40 years, I started as a buidlers labourer back in 1983 for my uncle, working on houses and in offices in the maida vale area.
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Latest review:
Carpentry- 20 Jul 2024
Wayne and his team did a great job. Communication and planning was effective from the start, and stuck to the deadline that was set at the beginning of the project. I’d definitely hire again for my upcoming projects.
Lee Constructions
Rating: 5 out of 5
Extension Builder in Southwark
I have over 20 years Groundwork experience, including all aspect of the building trade. My catalogue of works include the following: Loft/house extensions, underpinning, general repairs, driveways, paving, landscaping, property management, refurbishments and project renovations. I am able to access various specialists to support all your building needs. I pride myself on my work ethic, reliability, transparency and honesty. I am happy to provide genuine references upon request. Please contact me for a no obligation quote. Thank you!
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Latest review:
Driveways (Paved & Loose)- 20 Jun 2026
Lee arrived right on time to fix the ACO drainage on my driveway. Communication was excellent throughout the entire process. He kept me informed and explained everything clearly. He was also exceptionally clean and tidy, leaving the driveway spotless after finishing the work.
Don & Dorian Limited
Rating: 5 out of 5
Extension Builder in Southwark
We are Don & Dorian Limited. We are a family run business based on the corner of Central London in Islington. We have a combined experience of 40 years between us. We specialise in interior renovations, loft conversions, extensions and new builds. We usually undertake a project fully from start to finish as we have many in-house trades from plumbers and electricians to carpenters and painters. We pride ourselves with the quality of work we produce and thoroughness.
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Latest review:
Extensions- 17 Feb 2022
Don and Jake were terrific. Nothing was too much trouble and they provided work to a very high standard. They were extremely competent and I cannot recommend them highly enough. I have done many building projects and they were the first builders that I didn't fall out with!
Til construction LTD
Rating: 5 out of 5
Extension Builder in Southwark
TIL Construction LTD is a well-establish company that provides a complete and cost-effective solution for your building needs. We pride ourselves on a team of highly skilled craftsmen and professionals ready to deliver any sized construction project from start to finish. Whether it’s a new build, extension, loft conversion, or renovation, we can help with a portfolio of building work across London and other cities within the UK.
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Latest review:
Carpentry- 5 Aug 2023
A gréât expérience. Thé team were very professional, well priced, and did a great job. They left our apartment immaculately clean and fixed all issues we had. They were extremely polite and responsive and did a great job in the timeframe and for the quoted cost. Highly recommend
Fussion Contracts
Rating: 5 out of 5
Extension Builder in Southwark
Hello, I’m a carpenter with 6 years experience who specialises in small odd jobs and refurbishments . Have a small crew and subcontractors availible on requests or if needed for the job. Fully insured and with trackable references.
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Latest review:
Carpentry- 7 May 2018
Good guys, committed to making sure the job is done right and to high standard. Many thanks
Yida Design and Construction Ltd
Rating: 5 out of 5
Extension Builder in Southwark
Yida Construction is a limited company based in Central London. We are a very reliable and professional team of tradesmen with over 10 years of experience in the building industry, committed to delivering the highest levels of quality and service to our clients.
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Latest review:
Restoration & Refurbishment- 26 Jun 2022
Tommy was a wonderful perfectionist and has done beautiful work in our stairway and hallway which had needed refurbishment for a very long time. It feels brand new. The flooring is perfect both in the hall and staircase, and the walls are now perfectly smooth and painted immaculately. Friendly and accommodating, we will be hiring again for more jobs in the future, undoubtedly. Thank you.
JDS Maintenance
Rating: 5 out of 5
Extension Builder in Southwark
Hi there, I am a Handyman, I got recomendations for my customers. Thanks a lot.
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Latest review:
Kitchen Fitting- 4 Apr 2025
Super professional, job completed properly. He is extremely knowledgable Would reccomend

3.8

Top rated Extension Builders

Our Extension Builders in Southwark, are rated 3.8 out of 5 based on 17 reviews from customers like you.

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What types of services are offered by local extension builders in Southwark?

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

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

What are the hourly rates of extension builders in Southwark?

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

Find extension builders in Southwark with MyBuilder

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

Step 2: Compare different extension builders in Southwark

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

Step 3: Hire Southwark extension builders with confidence

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

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

What to ask a Southwark extension builder before hiring?

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

An extension builder in Southwark 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 Southwark 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 Southwark?

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 Southwark 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 Southwark 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 Southwark

Can an extension builder in Southwark help with planning permission?

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

Many Southwark 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 Southwark help with materials and finishes?

Yes, most extension builders in Southwark 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.