Two-storey extensions in Highbury
Planning a bigger home in Highbury? Compare extension types and guide prices below, then book a free site visit.
Highbury at a glance
- Postcode districts
- N5
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Canonbury (0.6 miles), Islington (1 mile), Barnsbury (1 mile), Holloway (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 district N5 in and around Highbury, along with neighbouring Canonbury, Islington and Barnsbury.
Extensions available in Highbury
Two-storey rear extensions
For homes in Highbury: typical guide from £67,000.
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Two-storey side extensions
From £103,500 in Highbury. Free visit to firm it up.
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Two-storey wraparound extensions
Design, approvals and build for Highbury homes. Guide from £144,500.
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Part single, part two-storey extensions
Highbury guide price from £86,500, Standard spec.
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Extensions over a garage
For homes in Highbury: typical guide from £38,000.
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First-floor extensions
From £30,000 in Highbury. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Highbury guide price from £67,000, Standard spec.
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Two-storey extensions for detached houses
Our London guide starts at £103,500 for this type.
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Kitchen extensions with bedrooms above
From £67,000 (before kitchen units) in Highbury. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Guide from £67,000 (plus en-suite) in Highbury, including VAT.
Learn moreWhich type suits your house?
Which type suits your house in Highbury 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 Highbury
Highbury 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 Highbury
Do you cover Highbury?
Yes. We cover Highbury (N5) and the surrounding area, including Canonbury and Islington. The first site visit is free.
What does a two-storey extension cost in Highbury?
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 Highbury do you cover?
Everywhere around it, including Canonbury (0.6 miles), Islington (1 mile) and Barnsbury (1 mile), and the rest of Greater London.