Two-storey extensions in Highgate
Need more room in Highgate? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Highgate at a glance
- Postcode districts
- N6
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Hampstead (1.1 miles), Archway (1.1 miles), Belsize Park (1.4 miles), Chalk Farm (1.6 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 N6 in and around Highgate, along with neighbouring Hampstead, Archway and Belsize Park.
Extensions available in Highgate
Two-storey rear extensions
Highgate guide price from £67,000, Standard spec.
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Two-storey side extensions
Design, approvals and build for Highgate homes. Guide from £103,500.
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Two-storey wraparound extensions
Our London guide starts at £144,500 for this type.
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Part single, part two-storey extensions
Guide from £86,500 in Highgate, including VAT.
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Extensions over a garage
From £38,000 in Highgate. Free visit to firm it up.
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First-floor extensions
From £30,000 in Highgate. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Highgate guide price from £67,000, Standard spec.
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Two-storey extensions for detached houses
Highgate guide price from £103,500, Standard spec.
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Kitchen extensions with bedrooms above
Design, approvals and build for Highgate homes. Guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
From £67,000 (plus en-suite) in Highgate. Free visit to firm it up.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Highgate, with a rough idea of the approval route and cost for each.
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 Highgate
Highgate 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 Highgate
Do you cover Highgate?
Yes. We cover Highgate (N6) and the surrounding area, including Hampstead and Archway. The first site visit is free.
What does a two-storey extension cost in Highgate?
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 Highgate do you cover?
Everywhere around it, including Hampstead (1.1 miles), Archway (1.1 miles) and Belsize Park (1.4 miles), and the rest of Greater London.