Extension Builders in South London

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (21 reviews)

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Some of our top rated extension builders in South London

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DUMBUILDINGSERVICES LTD
No reviews yet
Extension Builder in South London
Our businesses is designated to indulge your property and help you with your needs, starting with building construction, garage, extension roof, brick work, fence, shed, decking, driveways, patio tiles, patio slabs, carpente, bathroom, kitchen and many more. All of our handymen are fully bonded professionals who get the job done on time, professionally, and to the highest standards
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Anthill & Ka LTD
No reviews yet
Extension Builder in South London
Take time and make great job!!
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BLV MAINTENANCE
New on MyBuilder
Extension Builder in South London
At BLV Maintenance, we are a dedicated team of skilled professionals specialising in Painting and Decorating, Building, and Property Maintenance services. We provide high-quality workmanship across a wide range of interior and renovation projects, including: Painting and decorating Kitchen installations and refurbishments Bathroom installations and renovations Wall partitioning and structural alterations Property maintenance and repairs Home improvements and remodelling solutions Our commitment is to deliver reliable, professional, and cost-effective services tailored to each client's needs. Whether you're looking to refresh a single room or undertake a complete property transformation, BLV Maintenance has the expertise to bring your vision to life. Please visit our instagram page @blv_maintenance_joinery to see our recent works. Our services: Brick / Concrete Structural Repairs Cladding Concrete Garages Concreting Extensions / Conversions Garage Conversions General Building Insurance Claim Specialist Partition Walls Property Maintenance / Repair Refurbishments.
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Iulian
No reviews yet
Extension Builder in South London
My name is Julian I have ben working in this industry for 17 years. during the great period of time we installed Cw door windows, stick sistem but also cladding, decking, balustrades, cladding, decking, SFS, plasterboard
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Singh
No reviews yet
Extension Builder in South London
Plumbing
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artour keri
No reviews yet
Extension Builder in South London
I am a general builder with over 30 years experience in the field 24 of those have been in greece where early in my career i specialised in large projects such as building hotels, petrol stations from the ground up but later gained knowledge in all sort of works. I have been in the UK for 6 years and have done, loft conversions, extensions, renovations and much more. I would describe myself as a perfectionist with great attention to detail and i find pride in my work
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N&G Walls Ltd
No reviews yet
Extension Builder in South London
Specialit Acreditated Contractor in SFS, Boarding, waterproofing, Insulation, Breathing membrane
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constructions in level
No reviews yet
Extension Builder in South London
Our company, Construction in level, specializes in construction works, groundworks, performing each project with passion, precision, and dedication. With our experience and attention to detail, we ensure the highest quality of service, meeting the expectations of even the most demanding clients. By choosing us, you choose reliability, professionalism, and satisfaction with the results.
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SPS GAS SERVICES LTD
No reviews yet
Extension Builder in South London
At SPS Design and Build, we don’t just construct buildings — we bring your vision to life with skill, precision, and professionalism. As a trusted build company, we manage projects of all sizes, from complex renovations to full-scale new builds. What sets us apart is our commitment to quality, safety, and client satisfaction. We are fully Electrically Certified and Gas Safe Registered, ensuring that all electrical and gas work is completed to the highest industry standards. Whether you're planning a new home, a commercial space, or a full property transformation, SPS Design and Build delivers reliable, end-to-end construction services with a focus on craftsmanship, compliance, and lasting results. Built right. Built safe. Built to last.
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Surplus stock traders ltd
No reviews yet
Extension Builder in South London
surplus stock traders ltd as a business under takes all types of business inc electrical installation ,plumbing ,drainage , demolition, decorating, double glazing , sound proofing and more
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KL
No reviews yet
Extension Builder in South London
•I used to work 5 year for a company and now im try to build somethink for myself. •I am a very cooperative person and my strongest skill is communication and so together we will build the best. •My vision is that you are satisfied with our work and we build the perfect garden for you. Choose us once and thank us twice.
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Nisar Groups
No reviews yet
Extension Builder in South London
Work is done with perfection and with perfect measurements. Experienced labour work under this company. Interior exterior garden front yard backyard bathroom works done ,Electrical work as well
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Integrate fitouts ltd
No reviews yet
Extension Builder in South London
Transforming spaces across the UK! 🛠️ From sleek shopfitting to all aspects off construction, Integrate Fitouts Ltd brings your vision to life. Contact us for unparalleled expertise. 📞 ‪07517 217785‬ 📧 integratefitouts@gmail.com
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Delex Services limited
Rating: 5 out of 5
Extension Builder in South London
Delex Services Ltd is an established British trade contractor specializing in integrated property installation and finishing services. Operating for a decade out of Essex, the company provides end-to-end commercial and residential refurbishments by combining mechanical services with internal outfitting. As an agile micro-entity, Delex delivers highly attentive project management, allowing clients to bypass the coordination of multiple separate subcontractors. We are also Safe Contractor registered and fully insured for private and commercial dwellings We provide full guranteee for outr works and will also try to work out best possible solution within budget and timescale given.
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Latest review:
Steve did a great job at my property. I've recommended him to friends, family and colleagues and will continue to recommend him to anyone in need of the services he offers.👏🏾
Delta Build Services
No reviews yet
Extension Builder in South London
collectively have experience of about 10 years, done several complete refurbishments, single and double story extensions, loft conversions. have done a newbuild warehouse from scratch to complete. have good experience of electric, plumbing, and joinery. qualifications for electrics are part P of building regs., 17th edition and Inspection & testing. Electric certificates will be provided through NICEIC.
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KINVEK CONSTRUCTION
Rating: 5 out of 5
Extension Builder in South London
We are a family run business, established January 2005, Kevin is a carpenter with over 40 years in the building industry, my son Matthew, who is a plumber, has been working with me for the last 10 years and wife Julie has been in the office since the start We pride ourselves on being friendly polite and trustworthy We do all types of building work, extensions, kitchens, bathrooms, carpentry, plumbing, electrics and decorating, fencing, decking
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Latest review:
Carpentry- 17 May 2026
Great guy, reliant, work done to spec and expectation. Thank you

Top rated Extension Builders

Our Extension Builders in South London, are rated 4 out of 5 based on 21 reviews from customers like you.

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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.