Two-storey extensions in Harringay
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Harringay.
Harringay at a glance
- Postcode districts
- N8
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Stroud Green (0.7 miles), Seven Sisters (0.9 miles), Hornsey (1 mile), Crouch End (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.
Around Harringay we also work in Stroud Green, Seven Sisters and Hornsey, and across the rest of Greater London. Postcode district in and near Harringay: N8.
Extensions available in Harringay
Two-storey rear extensions
Guide from £67,000 in Harringay, including VAT.
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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
Guide from £144,500 in Harringay, including VAT.
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Part single, part two-storey extensions
Design, approvals and build for Harringay homes. Guide from £86,500.
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Extensions over a garage
Design, approvals and build for Harringay homes. Guide from £38,000.
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First-floor extensions
Guide from £30,000 in Harringay, including VAT.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Harringay homes. Guide from £67,000.
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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
For homes in Harringay: typical guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Harringay: typical guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Greater London, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
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 Harringay
Harringay 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 Harringay
Do you cover Harringay?
Yes. We cover Harringay (N8) and the surrounding area, including Stroud Green and Seven Sisters. The first site visit is free.
What does a two-storey extension cost in Harringay?
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 Harringay do you cover?
Everywhere around it, including Stroud Green (0.7 miles), Seven Sisters (0.9 miles) and Hornsey (1 mile), and the rest of Greater London.