Home Extension Builders in Lewisham
Trusted home extension specialists in Lewisham (SE13, SE6) offering expert design, planning, and full construction - all delivered by Buildaway.
Your Local Home Extension
Specialists in
Lewisham
Lewisham is one of South East London's most property-rich boroughs, and Buildaway has
accumulated genuine experience completing home extensions across SE13, SE6, and the surrounding
areas. The borough presents a wide range of housing stock - late Victorian and Edwardian
terraces filling the residential streets around Hither Green and Lee, inter-war semis and
detached properties throughout Catford and Bellingham, and more recent developments closer to
Lewisham town centre and Deptford. Our home extension specialists in Lewisham bring the local
knowledge required to work confidently across all these property types and their distinct
planning environments.
Every part of the project stays in-house - home extension planning in Lewisham, architectural
design, structural engineering, planning applications, Building Control approvals, party wall
agreements, groundworks, brickwork, roofing, and full internal finishing, with no key trades
passed to outside contractors. Whether you're scoping out home extension ideas for a Victorian
terrace in Hither Green, trying to get a realistic picture of home extension cost in Lewisham,
or simply working out how much does a home extension cost for your property, our home extension
company in Lewisham gives you clear, honest answers and upfront pricing without any
pressure.
From side return extensions making the most of a tight plot, single-storey rear additions
creating open-plan living, through to double-storey and wrap-around home extensions in Lewisham,
Buildaway builds home extension plans around what your property can achieve, what your lifestyle
demands, and what your budget allows. As a trusted home extension specialist in Lewisham, we
take ownership of the entire journey - from first feasibility through to Building Control
sign-off - so every extension we deliver is compliant, crafted to a high standard, and built to
add lasting value.
Our Home Extension Packages in Lewisham
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 Lewisham Homeowners Choose Buildaway
Local teams with expert knowledge of Lewisham Central, Hither Green, SE13, and South East London commuter zones
Based in your area with local expertise and reputation.
Bespoke extension designs for Victorian terraces, family homes, and modern developments
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.
Hassle-free project management ensuring seamless, high-quality installations
Meticulous craftsmanship in every aspect of your extension.
Completed projects near Lewisham Station, Lewisham Shopping Centre, and Ladywell Road
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 Lewisham and surrounding areas, helping customers plan renovations with clarity before starting work.
House Extension Costs in Lewisham 2025 - The Complete Guide
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Do I Need Planning Permission for a Home Extension in Lewisham?
Expert insights into planning permission and building regulations for home extensions in Lewisham.
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Single-Storey vs Double-Storey Extensions in Lewisham 2026: Cost, Space, and ROI
Compare single-storey and double-storey home extensions in Lewisham - costs, planning requirements, space gains, and return on investment.
Read GuideWhat Our Clients Say
Real reviews from our satisfied customers.
"It was an absolute pleasure working with Cormac and the Buildaway team. Greg is an absolute star. Cormac’s communication and advice was excellent, and the organisation and sourcing of additional materials was brilliant. A truly great team, I would thoroughly recommend Buildaway if you are after a stress free and top quality renovation."
Sim Lewis
"Cormac & his team were brilliant throughout our bathroom renovation project. From scoping to completion, Cormac was always very responsive, answering any questions we had on product selection and helped us source the products to get the best price. His team worked extremely hard and a big shoutout to Greg for his attention to detail! We couldn’t be happier with the results and would highly recommend Buildaway for any building project in the future."
Georgina Ehmcke
"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
"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
"A great transformation of my bathroom into something modern and sleek. Cormac was professional to work with from the start and was very helpful in taking my ideas and sourcing products to fit the space and look aesthetically pleasing. I felt confident in working with the company as I could ask questions and I was also pleased to get suggestions and ideas. Cormac and Mo worked hard to deal with any issues that arose and they were friendly, helpful and I felt that I was valued as a customer. They were reliable and were always on time to arrive. Having a bathroom refurbished is a big decision and it was important for me to trust Cormac. I read reviews and met him in person to discuss the project and I am happy to give a positive recommendation to this company."
Vera Jajechnyk
"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
Frequently Asked Questions
Your questions about home extensions in Lewisham, answered.
How much does a home extension cost in Lewisham?
Home extension cost in Lewisham typically ranges from £45,000 to £110,000+. A single-storey rear extension (3m x 4m) costs £45,000–£65,000, larger single-storey extensions run £65,000–£85,000, side returns £35,000–£55,000, and double-storey extensions £85,000–£110,000+. Costs vary based on groundworks, finishes, and structural requirements. Buildaway provides full itemised home extension cost Lewisham breakdowns before work begins.
How does home extension cost in Lewisham compare to the UK average?
Home extension cost in Lewisham runs 15–20% above the UK national average, reflecting South East London labour and material rates across SE13 and SE6. A single-storey rear extension averaging £35,000–£50,000 nationally sits at £45,000–£65,000 in Lewisham. Buildaway offers transparent, no-hidden-fee estimates throughout.
How long does a home extension in Lewisham take?
Most home extensions in Lewisham 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. Party wall agreements - common across Lewisham's terraced streets - and planning permissions may extend lead times. Buildaway provides clear programme dates from the outset and keeps communication consistent throughout.
What home extension types does Buildaway offer in Lewisham?
Buildaway offers single-storey rear extensions, side return extensions, double-storey additions, wrap-around extensions, and garage conversions across Lewisham. Our home extension specialists assess your property's layout, boundary conditions, and local planning requirements before recommending the right approach and producing tailored home extension plans in Lewisham.
How does home extension planning in Lewisham work with Buildaway?
We open with a free site survey covering structure, boundaries, drainage, and any planning requirements specific to Lewisham. We discuss your home extension ideas and establish realistic costs for your property type. Buildaway then prepares all architectural drawings, structural calculations, and manages submissions to Lewisham Council - right through to Building Control completion certificates.
Does Buildaway manage both design and construction for home extensions in Lewisham?
Yes - our in-house team of architects, structural engineers, and tradespeople handles everything: planning applications, party wall agreements, Building Control submissions, and all construction trades including groundworks, brickwork, roofing, carpentry, electrics, plumbing, and plastering. As a fully integrated home extension company in Lewisham, you have one point of contact from initial consultation to final handover.
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We Serve Lewisham and Surrounding Areas
Find us serving Lewisham and the wider SE13 and SE6 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 Lewisham?
We combine stylish design with lasting durability - boosting property value in Lewisham’s fast-growing housing market.