Two-storey extensions in Islington
Need more room in Islington? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Islington at a glance
- Postcode districts
- EC1V and N1
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Barnsbury (0.7 miles), Canonbury (0.7 miles), King's Cross (0.9 miles), Highbury (1 mile)
- 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.
Around Islington we also work in Barnsbury, Canonbury and King's Cross, and across the rest of Greater London. Postcode districts in and near Islington: EC1V and N1.
Extensions available in Islington
Two-storey rear extensions
Our London guide starts at £67,000 for this type.
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Two-storey side extensions
Islington guide price from £103,500, Standard spec.
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Two-storey wraparound extensions
Islington guide price from £144,500, Standard spec.
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Part single, part two-storey extensions
Design, approvals and build for Islington homes. Guide from £86,500.
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Extensions over a garage
From £38,000 in Islington. Free visit to firm it up.
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First-floor extensions
Guide from £30,000 in Islington, including VAT.
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Two-storey extensions for semi-detached houses
Islington guide price from £67,000, Standard spec.
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Two-storey extensions for detached houses
For homes in Islington: typical guide from £103,500.
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Kitchen extensions with bedrooms above
Guide from £67,000 (before kitchen units) in Islington, including VAT.
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Extra bedroom and en-suite extensions
For homes in Islington: typical guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Islington 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 Islington
Islington 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 Islington
Do you cover Islington?
Yes. We cover Islington (EC1V and N1) and the surrounding area, including Barnsbury and Canonbury. The first site visit is free.
What does a two-storey extension cost in Islington?
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 Islington do you cover?
Everywhere around it, including Barnsbury (0.7 miles), Canonbury (0.7 miles) and King's Cross (0.9 miles), and the rest of Greater London.