Extension builders in Southwark

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.3 (18 reviews)

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Some of our top rated extension builders in Southwark

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Inside Out
Rating: 4.9 out of 5
Extension Builder in Southwark
Inside Out was formed in 2009. We are an established, London based building company operating throughout London and within the M25. We deliver an honest and straight forward service, with quality workmanship at the forefront of everything we do.
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Latest review:
Extensions- 10 Oct 2022
A good team, good building technicians, completed the job according to plan and delivered on time.
Martin
Rating: 5 out of 5
Extension Builder in Southwark
EAGLE UNIT CONSTRUCTION LTD WE ARE THE PERFECT COMPANY TO MAKE YOU HAPPY WITH YOUR HOME MAKE YOUR CHOICE NOW
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Latest review:
Painting & Decorating- 18 Sep 2022
Martin is a very attentive, multi skilled and thoughtful worker. His quote is accurate and honest. Most builders I have hired in the past offer a better price but then there is almost always additional 'hidden' costs. Martins work is thorough and works to completion. I would always hire Martin for a complete honest job knowing that I will get what I pay for. I would highly recommend him.
Dream Home Builder
Rating: 5 out of 5
Extension Builder in Southwark
My name is Leandro, I have 20 years of experience in construction industry in Europe and here in UK for 10. I don't mind in taking small handyman work or a full refurbishment of your house with a competitive price and high standard in quality and will be more than happy in help you with the maintenance of your home. We have worked in diverses range of projects applying skill and quality in every work. Thanks to read this small introduction.
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Latest review:
Tiling- 3 May 2019
Excellent communication from Leandro. He's a really tidy worker and has done a great job installing a splashback in our kitchen - would wholeheartedly recommend him to anyone
Miri zeneli
Rating: 4.9 out of 5
Extension Builder in Southwark
With many happy and returning customers over the last 11 years, you can be sure of being well looked after by Miri Construction. My aim is to provide a stress free project, delivered in a manner that I am confident will exceed your expectations. I carry out all work myself and will be your single point of contact. My customers often comment that I am approachable and cheerful. I find that a positive attitude always helps projects run smoothly with good communication throughout.
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Latest review:
Plastering- 17 Jan 2025
Miri was great in completing the project with an excellent finish and a competitive quote. Thank you Miri.
MAF Residence Ltd
Rating: 5 out of 5
Extension Builder in Southwark
MAF Residence Ltd Quality Construction. Professional Management. Reliable Delivery. MAF Residence Ltd is a professional construction and refurbishment company delivering high-quality residential and commercial projects across London, Buckinghamshire, Hertfordshire and surrounding areas. We specialise in complete property renovations, house extensions, loft conversions, structural alterations, roofing, flooring, landscaping and commercial refurbishment. Our objective is to provide clients with a complete construction service, managing projects from the initial stages through to final completion. Our Strengths One of the key strengths of MAF Residence Ltd is our ability to manage multiple trades under one contractor. We coordinate structural works, carpentry, roofing, insulation, plumbing, electrical installations, plastering, flooring, decorating and finishing works, giving our clients one reliable point of contact throughout their project. This approach provides greater accountability, better coordination and a more efficient construction process.
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Latest review:
This is the second time we’ve used Dan for building work at our property, and we wouldn’t hesitate to recommend him. He’s a very good builder with a strong eye for detail and a real commitment to doing things properly. He’s also trustworthy, which makes the whole process reassuring and stress-free. He has a great team around him and is knowledgeable across all aspects of building work, from electrics and plumbing to the finer finishing touches. It’s reassuring to have someone reliable and skilled working on your home.
Bischell Construction Limited
Rating: 4.9 out of 5
Extension Builder in Southwark
Design & Build projects that squeeze more out of every pound spent. We’ll deliver an outcome for you that looks a lot more expensive than it really is. It will be tailored to your lifestyle, designed for your senses and fine-tuned to minimise lifetime costs. If you have an eye on value, or looking for maximum ROI, we’ll deliver more for less. It’s about smart design and construction, so the result gives you more performance, better quality of life and a stronger return from your budget.
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Latest review:
Architecture- 21 Oct 2026
He was good, honest and helpfull.
B&CE CONSTRUCTION LTD
Rating: 4.9 out of 5
Extension Builder in Southwark
I am versatile carpenter with a background in residential, commercial, and municipal construction and remodeling. With a strong foundation in carpentry and woodworking, I have expertise in framing, trim, windows, doors, and siding. I possess in-depth knowledge of the construction process, from material selection and techniques to tools and equipment.
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Latest review:
Carpentry- 14 Apr 2026
Great
Home General Building limited
Rating: 5 out of 5
Extension Builder in Southwark
A company that works on the restoration and repair of all things related to buildings and we have experience in all magazines such as the installation of kitchens and bathrooms, construction work, restoration of paints, installation of wood tiles, windows and many other works related to construction
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Latest review:
Really good job all-time
Chris
Rating: 5 out of 5
Extension Builder in Southwark
Hello, For the last few years I have been working in a construction company. During the pandemic, I decided to start working on my own.
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Latest review:
Handyman- 5 Mar 2026
Chris built some pax wardrobes for us, did a fantastic job from start to finish. Arrived on time, great quality of work and left the place looking spotless. I would highly recomend him
Home Design & Build
Rating: 5 out of 5
Extension Builder in Southwark
Tooled with years of experience, we undertake design & reconfiguration of builds; adding value to your home or business. Working closely with you; we create a bespoke, quality finish within your budget & affordability. Delivering a high standard of skill & integrity of craftsmanship we are proud off
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Latest review:
Kitchen Fitting- 24 Jun 2025
Lalli and her team were all very professional, communicative, and detail oriented helping us create a new kitchen and bathroom that we love, not to mention, on schedule! We would highly recommend Home Design and Build and hope to work with then again in the future.
(TLC) THE LONDON CONSTRUCTION GROUP LTD
Rating: 5 out of 5
Extension Builder in Southwark
cover a broad spectrum within construction ranging from both residential and commercial contracts, bespoke builds, refurbishment, and maintenance also implementation of design from minimalist design to period restoration and renovation of properties.
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Latest review:
Restoration & Refurbishment- 16 May 2021
TLC have completed the first phase of the project which has involved a complete renovation and upgrade of the kitchen, bathroom, and rear garden area. A new contemporary staircase has also been fitted. The work has been completed well ahead of schedule, and this is testament to the planning and coordination skills provided by TLC. All of the work has been completed to a very high standard, and a great deal of care has been taken to ensure the minimum disruption to the local residents. We are extremely grateful for the advice and support provided to us leading up to the restoration work and whilst the restoration was underway, and we are absolutely delighted with the final results. Our house has been transformed into a contemporary family home. Many thanks to Bradley, Paul, and the rest of the team at TLC.
MM
Rating: 3.7 out of 5
Extension Builder in Southwark
We are a highly experienced kitchen and bathroom design and installation company with over 20 years of proven expertise in delivering exceptional results. We provide a comprehensive, end-to-end service—from detailed consultation and bespoke design through to precise, high-quality installation—or a dedicated installation service tailored to your specific needs. Our work is defined by technical accuracy, refined craftsmanship, and a deep understanding of both aesthetics and functionality. We deliver bespoke kitchen and bathroom solutions across a full spectrum, from well-specified standard projects to luxury, high-end installations, all executed with exacting standards and attention to detail. Operating throughout London and the surrounding areas, we are committed to delivering a consistently high level of service, underpinned by expert guidance and industry knowledge. Every project is approached with a structured, client-focused process, ensuring clear communication, efficient delivery, and outstanding results. Regardless of the size or complexity of the project, we work in close partnership with our clients to accurately interpret their vision and requirements—translating them into expertly crafted spaces that meet the highest professional standards.
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Latest review:
Kitchen Fitting- 7 Sep 2026
Michael our kitchen fitter was amazing and went beyond the call of duty, especially as he took over an old kitchen with old pipes. So he had to re adjust everything and take serious measures to make sure that there were no leaks even though it was quite an old system and he adjusted cabinets to bypass the protrusions. He’s very nice and honest and good to work with so you can be sure you’re in good hands with him.
Baho Builders Ltd
Rating: 3.9 out of 5
Extension Builder in Southwark
Baho Builders Ltd specialise in all types of building we are professional and very determined to ensure our clients expectations are met. we have worked on many different building projects for more than 10 years experience. We put our heart and soul into our work, ensuring that your project is worth every pound you spend on it!
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Latest review:
Landscaping- 4 Oct 2024
One word to define this 'company' COWBOY builders. Numerous issues one after another. Had to get 2nd/3rd opinion on their work to make sure I wasn't being fobbed off. Conducted loads of research which meant left being uneasy especially as a large chunk of payment was made after only 1 day of work when in fact payment was due end of completion. 1- Underestimating material costs 2- Slabs off the walkway coming loose within 2 months of being put down 3- Ignoring attempts of rectifying the flawed job 4- walkway was meant to be clear of grass and strictly shingles but grass/weed still appearing. 5- Forgot to state ground levels would be raised then creating a lie saying I had been told 6- denying and ignoring the obvious Wouldn't trust the reviews being left here and definitely wouldn't use or recommend them to anyone. Have decided to give up on trying to get them to fix their shoddy job and find someone else to fix their mess Correction - you was aware & agreed with mat delivery
Pops Building Services Ltd
Rating: 5 out of 5
Extension Builder in Southwark
I am a city and guilds advanced craft qualified carpenter/joiner With over 30 years experience in the construction industry. I was the director of a property development company. I’ve managed contracts for NHS trusts as well as private contractors. The types of work I normally undertake are loft conversions, extensions, renovations, kitchen and bathroom installations
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Latest review:
Peter was the on-site foreman on our complete house renovation, which took just over a year. This included an additional ensuite pod bedroom in the roof and a side-return and extension to the kitchen. Peter was totally reliable throughout the project and thoroughly professional. Throughout this time we were living in the house with the children. He was always on time, managed the on-site team well and communicated clearly with us. His workmanship is high quality and he was also a stickler for checking the work of others and getting it updated if it wasn’t up to scratch. I have no hesitation in recommending Peter.
MOVIX CONSTUCTION
Rating: 5 out of 5
Extension Builder in Southwark
👷‍♂️ Hello, With over a decade of hands-on construction experience, I offer expertise tailored to your project's needs. From residential renovations to commercial ventures, I'm committed to delivering excellence. Let's build something exceptional together!
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Latest review:
Good guy very experienced and professionals completed the job well
RBS CONSTRUCTION UNIT
Rating: 5 out of 5
Extension Builder in Southwark
At RBS we specialise in commercial/domestic building work such as garden rooms, extensions, and renovation work. Whether the job is big or small, we take pride in the work we do and your best interest is always our priority. If you are in London or surrounding areas get in touch for a free quote, it would be our pleasure to help you be a step closer to having your dream home.
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Latest review:
Bricklaying- 6 Jul 2023
Very happy with the job done. Completed to a high standard.

4.3

Top rated Extension Builders

Our Extension Builders in Southwark, are rated 4.3 out of 5 based on 18 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.