Two-storey extensions in Hadley Wood
Homeowners in Hadley Wood can use us for the whole project or just the drawings and approvals. Start with a free visit.
Hadley Wood at a glance
- Postcode districts
- EN4
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- New Barnet (1.2 miles), East Barnet (1.4 miles), Cockfosters (1.5 miles), Barnet (1.7 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 Hadley Wood we also work in New Barnet, East Barnet and Cockfosters, and across the rest of Greater London. Postcode district in and near Hadley Wood: EN4.
Extensions available in Hadley Wood
Two-storey rear extensions
Design, approvals and build for Hadley Wood homes. Guide from £67,000.
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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
For homes in Hadley Wood: typical guide from £144,500.
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Part single, part two-storey extensions
For homes in Hadley Wood: typical guide from £86,500.
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Extensions over a garage
Hadley Wood guide price from £38,000, Standard spec.
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First-floor extensions
Design, approvals and build for Hadley Wood homes. Guide from £30,000.
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Two-storey extensions for semi-detached houses
Hadley Wood guide price from £67,000, Standard spec.
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Two-storey extensions for detached houses
Hadley Wood guide price from £103,500, Standard spec.
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Kitchen extensions with bedrooms above
Our London guide starts at £67,000 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
Design, approvals and build for Hadley Wood homes. Guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Hadley Wood 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 Hadley Wood
Hadley Wood 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 Hadley Wood
Do you cover Hadley Wood?
Yes. We cover Hadley Wood (EN4) and the surrounding area, including New Barnet and East Barnet. The first site visit is free.
What does a two-storey extension cost in Hadley Wood?
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 Hadley Wood do you cover?
Everywhere around it, including New Barnet (1.2 miles), East Barnet (1.4 miles) and Cockfosters (1.5 miles), and the rest of Greater London.