Home Extension Builders in Hampstead
Hampstead NW3 home extension for period and conservation-area homes, delivered by Buildaway with the planning rigour and structural care they require.
Your Local Home Extension
Specialists in Hampstead
Searching for home extension builders in Hampstead (NW3)? Buildaway extends homes
across NW3 - the period houses of Hampstead Village, Church Row and Flask Walk, the
properties bordering Hampstead Heath and Kenwood House, and the homes near South End
Green, Belsize Park and Whitestone Pond.
Hampstead home extension for period and conservation-area homes is delivered by
Buildaway with the planning rigour and structural care they require. NW3 is heavily
protected and much of it is listed, so the consent strategy is the project's
foundation - get it wrong and there is no build. Buildaway establishes what is
achievable, secures the approvals, then delivers groundwork, structure, glazing and
finish on a single NW3 contract.
Our Home Extension Packages in Hampstead
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 Hampstead Homeowners Choose Buildaway
Local expert teams with deep knowledge of NW3 and surrounding North London areas
Based in your area with local expertise and reputation.
Tailored extension designs for Georgian townhomes, elegant mansions, and premium apartments
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 from concept to completion
Meticulous craftsmanship in every aspect of your extension.
Proven reputation with successful projects near Hampstead High Street, Hampstead Heath, and Frognal
Professional consultation and detailed quotes at no cost.
Latest Home Extension Insights
We publish detailed home extension guides and cost insights for homeowners across Hampstead and surrounding areas, helping customers plan projects with clarity before starting work.
Home Extension Cost in Hampstead
A local cost guide written specifically for Hampstead 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.
“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
“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
“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
“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…”
Vera Jajechnyk
“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
Frequently Asked Questions
Your questions about home extensions in Hampstead, answered.
How much does a home extension cost in Hampstead?
As a guide, a home extension in Hampstead (NW3) runs roughly £3,100–£4,100 for a single-storey rear, £4,100–£5,500 for a larger or wrap-around scheme, and £77,500–£102,500 for double-storey work. UK build costs sit around £1,800–£3,000 per m², and London consistently lands at the upper end. Buildaway fixes your figure in a written quote after survey.
How long does a home extension take in Hampstead?
A single-storey extension in Hampstead typically takes 12 to 14 weeks on site, with double-storey nearer 16–20. Add lead-in for planning - Camden Council runs an 8-week determination period - plus party-wall notices, which need up to 2 months in NW3 terraces. Buildaway starts the paperwork early so the build is not waiting on it.
Do I need planning permission for an extension in Hampstead?
Assume it may. Hampstead extensions frequently run into conservation-area policy or listed-building consent, and NW3 flats cannot use permitted development regardless. Buildaway resolves the Camden Council position first, because it determines what is worth drawing.
What types of extension do you offer in Hampstead?
Rear, side-return, wrap-around, double-storey and lower-ground - Buildaway delivers all of them in Hampstead. Terraces around Hampstead Village and Belsize Park usually point to a side-return; where outward space is limited in NW3, going down or reconfiguring inside often makes better sense. We advise from survey.
Do Buildaway handle both design and construction for Hampstead extensions?
Yes - design, planning and construction under one Buildaway contract in Hampstead. That single accountability is the main reason our NW3 extensions finish on the dates we committed to.
Are your extension specialists local to Hampstead?
Yes. Buildaway works across Hampstead and the surrounding NW3 streets regularly, so we know the plots around Hampstead Village and Belsize Park, the drainage runs, and what Camden Council has approved nearby. Local precedent is genuinely useful - knowing what got consented on the next street shapes a scheme that will pass.
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We Serve Hampstead and Surrounding Areas
Find us in the heart of Hampstead. 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 Hampstead?
Buildaway consistently delivers extensions in Hampstead that blend timeless style with modern functionality, designed to complement the area's prestigious homes.