Two-storey extensions in Archway
Homeowners in Archway can use us for the whole project or just the drawings and approvals. Start with a free visit.
Archway at a glance
- Postcode districts
- N6 and N19
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Crouch End (1 mile), Highgate (1.1 miles), Holloway (1.1 miles), Stroud Green (1.1 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 districts N6 and N19 in and around Archway, along with neighbouring Crouch End, Highgate and Holloway.
Extensions available in Archway
Two-storey rear extensions
Guide from £67,000 in Archway, including VAT.
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Two-storey side extensions
Archway guide price from £103,500, Standard spec.
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Two-storey wraparound extensions
For homes in Archway: typical guide from £144,500.
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Part single, part two-storey extensions
Archway guide price from £86,500, Standard spec.
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Extensions over a garage
For homes in Archway: typical guide from £38,000.
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First-floor extensions
Guide from £30,000 in Archway, including VAT.
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Two-storey extensions for semi-detached houses
For homes in Archway: typical guide from £67,000.
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Two-storey extensions for detached houses
Design, approvals and build for Archway homes. Guide from £103,500.
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Kitchen extensions with bedrooms above
Archway guide price from £67,000 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Guide from £67,000 (plus en-suite) in Archway, including VAT.
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 Archway, 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 Archway
Archway 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 Archway
Do you cover Archway?
Yes. We cover Archway (N6 and N19) and the surrounding area, including Crouch End and Highgate. The first site visit is free.
What does a two-storey extension cost in Archway?
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 Archway do you cover?
Everywhere around it, including Crouch End (1 mile), Highgate (1.1 miles) and Holloway (1.1 miles), and the rest of Greater London.