Home Extension Builders in Lambeth
Professional home extensions across Lambeth (SE11), from design and drawings to build and sign-off - all managed by Buildaway.
Your Local Home Extension
Specialists in Lambeth
Many Lambeth properties sit close to multiple Lambeth conservation areas, where proportionate additions are assessed against the original dwelling rather than its current size. Buildaway will say at survey stage whether a scheme is likely to succeed before you spend money on drawings. Buildaway's SE11 work runs from Lambeth Palace across to Lambeth Bridge, taking in the properties along Lambeth Road and Brixton Road.
Extension work in Lambeth spans SE11, SE1, SW2 for Buildaway, covering Imperial War Museum, the properties off Clapham Road, and the houses backing onto Lambeth Bridge.
With a strong reputation for quality workmanship, Buildaway delivers extension design and construction across Lambeth and the wider SE11 area. Whether adding a single-storey rear extension or a double-storey addition, we explain the build cost and programme clearly and deliver structurally sound, well-finished results.
Our Home Extension Packages in Lambeth
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 Lambeth Homeowners Choose Buildaway
Local teams with expertise across Lambeth North, Southbank, SE1, and the wider Lambeth borough
Based in your area with local expertise and reputation.
Bespoke extension designs for riverside apartments, family homes, and Georgian conversions
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 high-quality, stress-free installations
Meticulous craftsmanship in every aspect of your extension.
Proven projects completed near Waterloo, Kennington, Westminster Bridge Road, and Southbank attractions
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.
What Our Clients Say
Real reviews from our satisfied customers.
“After meeting with Cormac, we were confident that he understood our requirements and could achieve the design we proposed. He gave a detailed and competitively priced quote ... He communicates well, and works with you, offering advice and suggestions. We now have a fantastic new bathroom.”
Garry Knight
Verified Google review
“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 quality of the finish is excellent. The bathroom looks fantastic and the bedrooms feel completely refreshed.”
Helen Sivyer
Verified Google review
“Communication was clear and consistent both before and throughout the project, which made the whole process feel well managed ... The quality of the finish is excellent ... They stuck to the agreed timelines, and pricing was transparent throughout.”
Sean Kelleher
Verified Google review
“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.”
Jackie Brown
Verified Google review
“In half an hour he was at the door ... he listened and then checked, measured and said to me it is doable. Cormac is very good with communication, listening, advising, a hard worker and an excellent team leader. I am extremely impressed, happy and proud of what his team delivered.”
Betty Lwanga
Verified Google review
“The first time I met Cormac, I knew that he is a professional, everything explained in detail ... In the end, he didn't let me down. I was very impressed with his work.”
Seow Khor
Verified Google review
Frequently Asked Questions
Your questions about home extensions in Lambeth, answered.
Can I stay in the house during the build?
Usually yes for a single-storey rear extension, since the existing structure stays sealed until late in the programme. Buildaway phases the Lambeth work so the opening-up happens over the shortest practical period.
How long does a rear extension take to build?
A single-storey rear extension is generally ten to fourteen weeks on site once foundations start, depending on glazing lead times. Double-storey work runs longer. Buildaway separates the design and consent period from the build period on the programme so expectations are realistic.
Can you extend within multiple Lambeth conservation areas?
Sometimes, but the tests are stricter and additions are assessed against the original dwelling rather than its current size. Buildaway will tell you honestly at survey stage whether a scheme is likely to succeed before you spend money on drawings.
Do I need planning permission for an extension in Lambeth?
Many single-storey rear extensions fall under permitted development, but that changes inside multiple Lambeth conservation areas, listed building consent and Article 4 directions, where allowances are materially tighter. Buildaway establishes which category your SE11 property falls into before drawing anything.
Do you handle drawings and building control?
Yes. Buildaway coordinates structural calculations, the building control application and inspections, and manages the party wall process where a neighbouring wall is affected, which is frequent on Lambeth semi-detached properties.
Get Your Free Quote
Tell us about your project and we'll get back to you within 24 hours.
We Serve Lambeth and Surrounding Areas
Based locally and working across Lambeth and the neighbouring SE11 streets every week.
Nearby Areas We Serve
Below are some of the local areas where you can find Buildaway transforming homes.
Ready to Transform Your Extension in Lambeth?
We combine stylish, durable craftsmanship with enhanced property value - essential for Lambeth’s high-demand rental and homeowner market.