Two-storey extensions in Pinner
We design, get approval for and build two-storey extensions in Pinner and the surrounding area. Choose the type of extension below or book a free site visit.
Pinner at a glance
- Postcode districts
- HA5
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Hatch End (1 mile), Northwood Hills (1.2 miles), Wealdstone (2 miles), Ruislip Manor (2 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 HA5 in and around Pinner, along with neighbouring Hatch End, Northwood Hills and Wealdstone.
Extensions available in Pinner
Two-storey rear extensions
From £67,000 in Pinner. Free visit to firm it up.
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Two-storey side extensions
From £103,500 in Pinner. Free visit to firm it up.
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Two-storey wraparound extensions
Guide from £144,500 in Pinner, including VAT.
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Part single, part two-storey extensions
Design, approvals and build for Pinner homes. Guide from £86,500.
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Extensions over a garage
For homes in Pinner: typical guide from £38,000.
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First-floor extensions
From £30,000 in Pinner. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Pinner guide price from £67,000, Standard spec.
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Two-storey extensions for detached houses
From £103,500 in Pinner. Free visit to firm it up.
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Kitchen extensions with bedrooms above
For homes in Pinner: typical guide from £67,000 (before kitchen units).
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Extra bedroom and en-suite extensions
Design, approvals and build for Pinner homes. Guide from £67,000 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Pinner 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 Pinner
Pinner 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 Pinner
Do you cover Pinner?
Yes. We cover Pinner (HA5) and the surrounding area, including Hatch End and Northwood Hills. The first site visit is free.
What does a two-storey extension cost in Pinner?
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 Pinner do you cover?
Everywhere around it, including Hatch End (1 mile), Northwood Hills (1.2 miles) and Wealdstone (2 miles), and the rest of Greater London.