Home Extension Builders in St John's Wood
Rear and lower-ground extensions in St John's Wood NW8, where Buildaway handles the planning position, the neighbours and the structure before breaking ground.
Your Local Home Extension
Specialists in St John's Wood
Looking for extension specialists in St John's Wood (NW8)? Buildaway works across
NW8 - the mansion blocks on Wellington Road and Hamilton Terrace, the villas off St
John's Wood High Street, and the homes near Lord's Cricket Ground, Abbey Road,
Regent's Park and Primrose Hill.
Rear and lower-ground extensions in St John's Wood see Buildaway handle the planning
position, the neighbours and the structure before breaking ground. NW8's detached
villas can take a substantial addition, while the mansion blocks usually cannot take
one at all - so the feasibility work decides the project. Buildaway establishes it,
secures consent, then delivers groundwork, structure, services and finish on one NW8
contract.
Our Home Extension Packages in St John's Wood
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 St John's Wood Homeowners Choose Buildaway
Expert installation teams with deep knowledge of NW8 and the City of Westminster
Based in your area with local expertise and reputation.
Tailored extension designs for Victorian villas, townhouses, and period flats
We handle everything so you don't have to worry.
Full project management for a seamless, stress-free experience
Meticulous craftsmanship in every aspect of your extension.
Transparent and honest pricing with no hidden fees or unexpected charges.
Clear upfront pricing with no surprises along the way.
Completed projects near Lord's Cricket Ground, St John's Wood High Street, and NW8’s prime locations
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 St John's Wood and surrounding areas, helping customers plan projects with clarity before starting work.
Home Extension Cost in St John's Wood
A local cost guide written specifically for St John's Wood homeowners, with real figures for the area.
Home Extensions London: The Complete 2026 Guide
Everything from feasibility and planning to structure, cost and programme for a London extension.
Single-Storey Rear Extension Cost London
A realistic cost breakdown for the most common extension in London, with the variables that move it.
What Our Clients Say
Real reviews from our satisfied customers.
“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
“I was recommended Buildaway by a colleague as I was impressed by the work they had done for my colleague. From the moment I contacted Cormac, I knew I was in good hands. He was incredibly friendly and accommodating right from the start. The very next day, he was at my property, taking measurements and discussing design options. What really impressed me was Cormac's honesty…”
Nana A.
“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
“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…”
Michael Marks
“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
“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
Frequently Asked Questions
Your questions about home extensions in St John's Wood, answered.
How much does a home extension cost in St John's Wood?
Buildaway prices St John's Wood extensions from survey. As a working guide across NW8: £3,200–£4,300 single-storey rear, £4,300–£5,700 wrap-around, £80,000–£107,500 double-storey. Roof lanterns, bifolds and structural spans move it most. The quote is fixed in writing before we break ground.
How long does a home extension take in St John's Wood?
Allow roughly 12–20 weeks of build in St John's Wood, depending on scheme. The programme most people forget is before that: design, Westminster City Council approval and party-wall awards can add 3–4 months to a NW8 project. Buildaway runs those in parallel and gives you a realistic combined timeline up front.
Do I need planning permission for an extension in St John's Wood?
It depends on your NW8 property. Permitted development covers a good number of St John's Wood rear extensions, but if you are listed, in a conservation area, or leasehold, the answer changes and Westminster City Council consent is needed. Buildaway confirms what is achievable at feasibility rather than designing something that gets refused.
What types of extension do you offer in St John's Wood?
We handle single-storey, side-return, wrap-around, double-storey and basement extensions throughout St John's Wood. The right answer for your NW8 property depends on drainage, boundary and Westminster City Council policy. Buildaway establishes those before proposing anything.
Do Buildaway handle both design and construction for St John's Wood extensions?
We do the whole thing. Buildaway surveys your St John's Wood property, designs a scheme that is genuinely consentable, secures approval from Westminster City Council, and builds it with our own team - one point of contact from feasibility around Hamilton Terrace and Wellington Road to sign-off.
Are your extension specialists local to St John's Wood?
Yes, St John's Wood is core Buildaway territory. We build extensions across NW8 regularly and understand both the buildings and the Westminster City Council policies that govern them.
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We Serve St John's Wood and Surrounding Areas
Find us in the heart of St John's Wood. We are proud to serve our local community.
Nearby Areas We Serve
Below are some of the local areas where you can find Buildaway transforming homes.
Ready to Transform Your Extension in St John's Wood?
Buildaway combines expert craftsmanship with stylish design enhancing property value across St John's Wood and Central London.