Home Extension Builders in Clapham
Trusted home extension specialists in Clapham (SW4, SW11) offering expert design, planning, and full construction - all delivered by Buildaway.
Your Local Home Extension
Specialists in
Clapham
Clapham is one of South West London's most sought-after neighbourhoods, and Buildaway has built
a strong track record completing home extensions across SW4 and SW11. The area is characterised
by wide-fronted Victorian terraces and grand stucco townhouses around Clapham Common and Old
Town, alongside more compact Edwardian and inter-war properties in Clapham South and Abbeville
Village. Our home extension specialists in Clapham understand the distinct structural
requirements and conservation sensitivities that come with each of these property types.
Every element is handled entirely by our in-house team - home extension planning in Clapham,
architectural design, structural engineering, planning applications, Building Control approvals,
party wall agreements, groundworks, brickwork, roofing, and complete internal finishing with no
outsourcing of key trades. Whether you're considering home extension ideas for a period
Victorian terrace, assessing home extension cost in Clapham, or working out how much does a home
extension cost for your specific property, our home extension company in Clapham gives you
honest pricing and clear answers from day one.
From single-storey rear extensions and side return additions to double-storey and wrap-around
home extensions in Clapham, Buildaway shapes home extension plans around your property, budget,
and how you actually use your home. As a trusted home extension specialist in Clapham, we manage
the entire process from initial feasibility through to Building Control sign-off - so your
extension is compliant, well-built, and adds real lasting value.
Our Home Extension Packages in Clapham
Single-Storey Rear Extension
Ideal for expanding your living space. Includes structural survey, architectural drawings, groundworks and foundations, brickwork and roofing, bi-fold or sliding doors, heating installation, building regulation approval.
Side Return Extension (Most Popular)
Complete kitchen and living area transformation. Includes structural assessment, full groundworks, steelwork if required, brickwork and matching materials, glazing and doors, full insulation, electrics upgrade, flooring, building regulation approval, waste removal.
Double-Storey Extension
For those seeking maximum space addition. Includes architectural design, full structural alterations, steelwork and foundations, bespoke staircase, multiple room creation, bathroom or en-suite option, planning and building regulation handling.
Why Clapham Homeowners Choose Buildaway
Local teams with detailed knowledge of SW4, Clapham Common, and surrounding areas
Based in your area with local expertise and reputation.
Bespoke extension designs for period conversions, townhomes, apartments, and new builds
We handle everything so you don't have to worry.
Transparent and honest pricing with no hidden fees or unexpected charges.
Clear upfront pricing with no surprises along the way.
Full project management from design to flawless completion
Meticulous craftsmanship in every aspect of your extension.
Trusted reputation built working near Clapham Old Town, Northcote Road, and the Clapham South area
Professional consultation and detailed quotes at no cost.
What's Included in Your Home Extensions Services
Everything you need for a seamless, stress-free home extension - from structure to finish.
Full groundworks and structural build
Complete groundwork preparation and structural construction services.
Plumbing, electrics, and heating integration
Professional installation of all mechanical and electrical systems.
Roofing, windows, and external finish
Complete roofing, window installation and exterior finishing.
Plastering, flooring, and decorating
Professional plastering, flooring and decorating services.
Interior fit-out and finishing
Complete interior fit-out and professional finishing touches.
Project management and schedule control
Professional project management and timeline control throughout.
Latest Home Extension Insights
We publish detailed home extension guides and cost insights for homeowners across Clapham and surrounding areas, helping customers plan renovations with clarity before starting work.
House Extension Costs in Clapham 2025 - The Complete Homeowner's Guide
A complete breakdown of home extension costs in Clapham. Understand labour, materials, and budgeting for your project.
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Do I Need Planning Permission for a Home Extension in Clapham?
Expert insights into planning permission and building regulations for home extensions in Clapham.
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Single-Storey vs Double-Storey Extensions in Clapham 2026: Cost, Space, and ROI
Compare single-storey and double-storey home extensions in Clapham - costs, planning requirements, space gains, and return on investment.
Read GuideWhat Our Clients Say
Real reviews from our satisfied customers.
"Buildaway recently finished a two week job completely renovating my bathroom and part renovation of the downstairs toilet. Cormac and his team did an incredible job. The quality of the work, their high standards, and their professionalism, along with effective and proactive communication made a refreshing change from the builders I have used in the past. Even when we changed our minds and ideas during the job Cormac’s patience and support emphasised that he wanted to make sure that the finished product was exactly what we wanted. From ordering products, to suggestions and ideas Cormac was helpful and a pleasure to work with. I would without question use Buildaway again for other work and would have no hesitation in recommending them to friends and family."
Michael Marks
"I wanted a bathroom refurbishment done and after meeting with several tradesmen decided to go with Buildaway Construction Ltd. From my first contact with Cormac, I was in good hands. His team turned my vision into reality, communicating with me every step of the way and offered helpful suggestions which turned my bathroom into an oasis. I could not be happier and would highly recommend their services. Thank you to the team of Buildaway Construction Ltd."
Jackie Brown
"We had an excellent experience working with Buildaway. Cormac was incredibly easy to work with, and gave helpful advice. The finished job was neat, professional and completed efficiently. We'd definitely recommend and would use them again!"
Roisin Lawrence
"Cormac and his team were excellent from start to finish. Communication was clear and consistent both before and throughout the project, which made the whole process feel well managed. Cormac was really responsive on any questions I had and always contactable. Cormac provided really helpful advice on products and design, and clearly understood the look I was aiming for. That made a big difference and really helped me make decisions. The quality of the finish is excellent, which was one of my top priorities. The team took real care to get everything right, and Mo in particular has a fantastic eye for detail. They were also very professional day to day - always tidy, and cleaned up really thoroughly when taking away all rubbish at the end. They stuck to the agreed timelines, and pricing was transparent throughout, with clear communication on any issues as they arose. Overall, I’m really pleased with the result and felt I could trust them throughout. I wouldn’t hesitate to recommend them."
Sean Kelleher
"I had a complete refurbishment of my bathroom by the Buildaway team recently. I received an excellent service from the outset with a very high standard of the completed work. Cormac was very responsive to my wish for a traditional period bathroom and helped me to source the suite, the tiles, the paneling and flooring. The team are respectful to the home generally. I am very pleased with the finished bathroom."
Philomena Mulcahy
"We recently used Buildaway for a full bathroom renovation at our home in Orpington, along with plastering, redecoration of both bedrooms and new spotlights installed in the bedrooms. From start to finish the experience was smooth and well organised. Cormac was easy to deal with, communication was clear and everything ran to the agreed timelines. The team turned up when they said they would and kept the house tidy each day, which made a big difference while we were living in the property during the works. The quality of the finish is excellent. The bathroom looks fantastic and the bedrooms feel completely refreshed. We wouldn’t hesitate to recommend Cormac and the Buildaway team."
Helen Sivyer
Frequently Asked Questions
Your questions about home extensions in Clapham, answered.
How much does a home extension cost in Clapham?
Home extension cost in Clapham typically ranges from £50,000 to £120,000+. A single-storey rear extension (3m x 4m) costs £50,000–£70,000, larger single-storey extensions run £70,000–£90,000, side returns £40,000–£58,000, and double-storey extensions £90,000–£120,000+. Costs vary based on groundworks, finishes, and conservation requirements. Buildaway provides full itemised home extension cost Clapham breakdowns before work starts.
How does home extension cost in Clapham compare to the UK average?
Home extension cost in Clapham runs 25–30% above the UK national average due to South West London labour rates and premium material costs across SW4 and SW11. A single-storey rear extension averaging £35,000–£50,000 nationally sits at £50,000–£70,000 in Clapham. Buildaway offers transparent, no-hidden-fee estimates throughout.
How long does a home extension in Clapham take?
Most home extensions in Clapham complete within 12 to 20 weeks. Single-storey rear extensions take 12–14 weeks, side returns 10–12 weeks, and double-storey extensions 16–20 weeks. Conservation area consents and party wall agreements are common in Clapham and may add further lead time. Buildaway sets clear programme dates from the outset and keeps you informed at every stage.
What home extension types does Buildaway offer in Clapham?
Buildaway offers single-storey rear extensions, side return extensions, double-storey additions, wrap-around extensions, and garage conversions across Clapham. Our home extension specialists assess your property's footprint, boundaries, and local planning constraints before recommending the best approach and creating tailored home extension plans in Clapham.
How does home extension planning in Clapham work with Buildaway?
We begin with a free site survey covering structure, boundaries, drainage, and any planning or conservation requirements specific to Clapham. We talk through your home extension ideas and work through costs for your property type. Buildaway manages all architectural drawings, structural calculations, and submissions to Lambeth Council - through to Building Control completion certificates.
Does Buildaway manage both design and construction for home extensions in Clapham?
Yes - our in-house team of architects, structural engineers, and tradespeople handles everything: planning applications, party wall agreements, conservation consents, Building Control submissions, and all construction trades. As a fully integrated home extension company in Clapham, you have one point of contact from first consultation to final handover.
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We Serve Clapham and Surrounding Areas
Find us serving Clapham and the wider SW4 and SW11 area.
Nearby Areas We Serve
Below are some of the local areas where you can find Buildaway transforming homes.
Ready to Transform Your Extension in Clapham?
We’ve transformed extensions in Clapham’s Victorian conversions, luxury apartments, and family homes - always delivering stylish, high-end results built to last.