Two-storey extensions in Muswell Hill
We design, get approval for and build two-storey extensions in Muswell Hill and the surrounding area. Choose the type of extension below or book a free site visit.
Muswell Hill at a glance
- Postcode districts
- N2 and N10
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Hornsey (0.9 miles), Crouch End (1.1 miles), Wood Green (1.3 miles), Archway (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 Muswell Hill (N2 and N10) and the places around it, including Hornsey (0.9 miles), Crouch End (1.1 miles) and Wood Green.
Extensions available in Muswell Hill
Two-storey rear extensions
Our London guide starts at £67,000 for this type.
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Two-storey side extensions
Guide from £103,500 in Muswell Hill, including VAT.
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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
Muswell Hill guide price from £86,500, Standard spec.
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Extensions over a garage
Muswell Hill guide price from £38,000, Standard spec.
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First-floor extensions
Design, approvals and build for Muswell Hill homes. Guide from £30,000.
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Two-storey extensions for semi-detached houses
For homes in Muswell Hill: typical guide from £67,000.
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Two-storey extensions for detached houses
Muswell Hill guide price from £103,500, Standard spec.
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Kitchen extensions with bedrooms above
Muswell Hill guide price from £67,000 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
From £67,000 (plus en-suite) in Muswell Hill. Free visit to firm it up.
Learn moreWhich type suits your house?
Rear and side extensions suit most semi-detached and detached houses with room around them. Terraced and town-centre homes can take a two-storey extension too, with more care over neighbours, light and access.
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 Muswell Hill
Muswell Hill 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 Muswell Hill
Do you cover Muswell Hill?
Yes. We cover Muswell Hill (N2 and N10) and the surrounding area, including Hornsey and Crouch End. The first site visit is free.
What does a two-storey extension cost in Muswell Hill?
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 Muswell Hill do you cover?
Everywhere around it, including Hornsey (0.9 miles), Crouch End (1.1 miles) and Wood Green (1.3 miles), and the rest of Greater London.