Two-storey extensions in Hampstead
Need more room in Hampstead? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Hampstead at a glance
- Postcode districts
- NW3
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Belsize Park (0.6 miles), Kilburn (0.6 miles), Highgate (1.1 miles), Chalk Farm (1.5 miles)
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
We cover postcode district NW3 in and around Hampstead, along with neighbouring Belsize Park, Kilburn and Highgate.
Extensions available in Hampstead
Two-storey rear extensions
Our London guide starts at £67,000 for this type.
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Two-storey side extensions
Our London guide starts at £103,500 for this type.
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Two-storey wraparound extensions
Design, approvals and build for Hampstead homes. Guide from £144,500.
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Part single, part two-storey extensions
From £86,500 in Hampstead. Free visit to firm it up.
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Extensions over a garage
For homes in Hampstead: typical guide from £38,000.
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First-floor extensions
Our London guide starts at £30,000 for this type.
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Two-storey extensions for semi-detached houses
Hampstead guide price from £67,000, Standard spec.
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Two-storey extensions for detached houses
For homes in Hampstead: typical guide from £103,500.
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Kitchen extensions with bedrooms above
Guide from £67,000 (before kitchen units) in Hampstead, including VAT.
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Extra bedroom and en-suite extensions
From £67,000 (plus en-suite) in Hampstead. Free visit to firm it up.
Learn moreWhich type suits your house?
Which type suits your house in Hampstead depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
Also available in Greater London
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Hampstead
Hampstead is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Hampstead
Do you cover Hampstead?
Yes. We cover Hampstead (NW3) and the surrounding area, including Belsize Park and Kilburn. The first site visit is free.
What does a two-storey extension cost in Hampstead?
Using our London guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £67,000–£90,500 including VAT. An extension over a garage is about £38,000–£55,000.
Which other places near Hampstead do you cover?
Everywhere around it, including Belsize Park (0.6 miles), Kilburn (0.6 miles) and Highgate (1.1 miles), and the rest of Greater London.