Extension Builders in South London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4.1 (22 reviews)

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

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 South London

3468 Results

Sort by:

A & S construction
No reviews yet
Extension Builder in South London
Mitchell Dougall Company : A & S construction Painter/decorator We are a family run company with over 40years of experience between the team. We are Based in bracknell and work in and around the area and are willing to travel for all painting / decorating works. We pride ourselves on a professional job upholding all of our works to the highest of standards! With no job being too big or to small! all works will be carried out to the best standards and highest of quality. for any work you would like to be done please get in contact! Thanks A&S
Get in touch
Modern Solutions Construction ltd
No reviews yet
Extension Builder in South London
We do a quality job and reasonable price.
Get in touch
Design Architect
No reviews yet
Extension Builder in South London
We are a team of passionate architects who are dedicated to bringing your vision to life. We understand that every property is unique and requires a personalised approach. We prioritize design integrity, passion, and attention to detail to ensure beautiful and impactful designs that meet professional standards. Design Architect is registered with the Architects Registration Board.
Get in touch
G T BUILDING AND RENOVATIONS
No reviews yet
Extension Builder in South London
G T Building Renovations, is a Company covering Kent and the South East, with over 20 years experience in Property Renovations and Building Services, small builds ,full refurbishments, on both residential and commercial properties, big jobs or small. We take great pride in our work making sure the customer is always happy at the end of the job. We are dedicated in providing an outstanding service. Our team can work evenings, nights, and weekends to meet your requirements.
Get in touch
Jamie Wolvey Brickwork
No reviews yet
Extension Builder in South London
Hi There. We are a Bricklayer team specialising in all Brickwork. ie Extension, Footing brickwork , Garden walls , retaining walls and patios I’ve been a bricklayer for over twenty years coving work all over the south east of England Regards Jamie Wolvey
Get in touch
Studio Charrette Property Limited
Rating: 1 out of 5
Extension Builder in South London
Studio Charrette Limited is a trusted provider of expert building and planning services. We proudly support homeowners in Gravesham, Dartford, Medway, Chatham, Gillingham, Strood, Rochester, and Maidstone. Specializing in high-quality construction and planning solutions, we are committed to delivering professional expertise tailored to each project’s unique needs. As part of our service, we offer planning, drawings, design, building regulations, and structural calculations, ensuring all necessary protections are in place if required. VIEW OUR BROCHURES
Get in touch
Latest review:
Extensions- 7 May 2026
They did not do anything after making a payment of £1190
TEST Carpentry Contractors LTD
No reviews yet
Extension Builder in South London
TEST Carpentry is an established and respected carpentry firm with many years of experience. We are experts in timber fames, loft conversion, extensions, self builds and refurbishment ranging from small scale jobs to much larger projects. We can quote and carry out all aspects of your design and work with a range of specialist tradesmen, designers and engineers to offer you a bespoke and personal service to meet your building requirements. check our instagram page out TEST Carpentry.
Get in touch
We Trust Property Services ltd.
No reviews yet
Extension Builder in South London
Welcome to We Trust Plumbing — your reliable local plumbing specialists and one-stop solution for all emergency and non-emergency plumbing needs. We provide professional plumbing, maintenance, installation and repair services for both residential and commercial customers. Whether you have a leaking tap, a blocked drain, a faulty toilet, a hot water problem or a plumbing emergency, our experienced team is here to help. We offer a quick-response, same-day plumbing service wherever possible and are available 7 days a week, providing flexible appointments at a time that is convenient for you. With over 15 years of experience in the plumbing trade, we take pride in delivering high-quality workmanship, honest advice, dependable service and long-lasting solutions at competitive prices. Our services include: • Emergency plumbing call-outs • Plumbing repairs and general maintenance • Leak detection and leak repairs • Faulty and replacement taps • Toilet repairs and replacements • Showers, shower valves and shower pumps • Blocked toilets, sinks and internal drains • Cold-water storage tanks • Feed and expansion tanks • Ball valves, overflows and water supply faults • Stopcocks and isolation valves • Vented and unvented hot-water cylinders • Immersion heaters and hot-water repairs • Water softeners • Leaking radiators and faulty radiator valves • Heating and plumbing repairs • Washing machine, dishwasher and other appliance installations • General domestic and commercial plumbing work At We Trust Plumbing, we understand how important it is to keep your home or business running safely and smoothly. From small plumbing repairs to larger installations and urgent call-outs, every job is completed with care, professionalism and attention to detail. If you do not see the service you require, please get in touch — we cover all aspects of plumbing and are always happy to discuss your needs and provide helpful advice. Reliable. Professional. Local. You Trust, We Deliver.
Get in touch
J Fairbairn Building Services Ltd
No reviews yet
Extension Builder in South London
At J Fairbairn Building Services we have over 30 years of experience, we pride ourselves on our high quality work and bringing your project to completion on time and on budget
Get in touch
BMS BRICKWORK LTD
No reviews yet
Extension Builder in South London
Highly reputable masonry specialist, 11 years experience covering the domestic, residential and commercial sector. we have established firm reputation for exceeding customer satisfaction, meeting deadlines and producing the finest quality work in the art of brickwork. We undertake a wide range of projects from low value jobs to high valued complex structures, with a diverse range of clients. All aspects of masonry work, groundwork's and project management undertaken.
Get in touch
Bricklayer
No reviews yet
Extension Builder in South London
I am manpreet singh. I am a bricklayer nd i also do weather pointing . I satisfied my client with me work .
Get in touch
J.M.C Electrical & Build Ltd
No reviews yet
Extension Builder in South London
JMC Electrical & Build was established in 2018 and has been working on projects in Greater London and surrounding areas ever since. we have a small team of professional who have carried out several domestic and commercial projects. we are mostly recommended by word of mouth due to our expertise service. we offer one stop solution for your needs.
Get in touch
P. Edwards Brickwork & Construction
No reviews yet
Extension Builder in South London
We undertake all aspects of construction.
Get in touch
JLF Total Solutions Ltd
No reviews yet
Extension Builder in South London
At JLF Total solutions Ltd we specialize in Electrical installations, Renewable energy and building services.
Get in touch
Simon Zajac
No reviews yet
Extension Builder in South London
Hi I worked as a Subcontractor over 8 years on multiple construction from groundwork to fully refurbished projects . I like to think of myself as a honest , reliable and hardworking person .
Get in touch
Daniel fissenden
No reviews yet
Extension Builder in South London
Hi I'm a city&guilds bricklayer been building houses flats and extensions for aprox 40 years my work covers foundations, super structure ie brick work carpentry, and roofing patios and drives etc still working now just need morehouse to hear from you soon ,thanks dan
Get in touch

4.1

Top rated Extension Builders

Our Extension Builders in South London, are rated 4.1 out of 5 based on 22 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 South London?

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 South London 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 South London who are available and interested can respond to your post.

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

What are the hourly rates of extension builders in South London?

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

Find extension builders in South London with MyBuilder

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

Step 2: Compare different extension builders in South London

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

Step 3: Hire South London extension builders with confidence

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

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

What to ask a South London extension builder before hiring?

Before hiring an extension builder in South London or extension building company in South London, 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 South London?

An extension builder in South London 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 South London 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 South London?

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 South London 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 South London 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 South London

Can an extension builder in South London help with planning permission?

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

Many South London 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 South London help with materials and finishes?

Yes, most extension builders in South London 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.