Two-storey extensions in Horley
Everything for a two-storey extension in Horley, in one place: types, guide prices for South East England, the approval rules in England and how to get started.
Horley at a glance
- Postcode districts
- RH6
- Area
- Surrey, England
- Price region
- South East England
- Nearest towns
- Crawley (4.4 miles), Redhill (4.6 miles), Reigate (4.8 miles), Broadfield (5.7 miles)
- Distance to Woking
- about 20 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.
Horley sits about 20.0 miles from Woking. Closer to home, Crawley is 4.4 miles away and Redhill 4.6 miles.
Extensions available in Horley
Two-storey rear extensions
Design, approvals and build for Horley homes. Guide from £61,500.
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Two-storey side extensions
Guide from £94,500 in Horley, including VAT.
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Two-storey wraparound extensions
Our South East England guide starts at £132,500 for this type.
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Part single, part two-storey extensions
Design, approvals and build for Horley homes. Guide from £79,000.
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Extensions over a garage
From £34,500 in Horley. Free visit to firm it up.
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First-floor extensions
Our South East England guide starts at £27,500 for this type.
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Two-storey extensions for semi-detached houses
For homes in Horley: typical guide from £61,500.
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Two-storey extensions for detached houses
Guide from £94,500 in Horley, including VAT.
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Kitchen extensions with bedrooms above
Our South East England guide starts at £61,500 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
For homes in Horley: typical guide from £61,500 (plus en-suite).
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Horley we also design annexes, home offices and bedrooms over garages.
Also available in Surrey
- 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 Horley
Horley 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 Horley
Do you cover Horley?
Yes. We cover Horley (RH6) and the surrounding area, including Crawley and Redhill. The first site visit is free.
What does a two-storey extension cost in Horley?
Using our South East England 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 £61,500–£83,000 including VAT. An extension over a garage is about £34,500–£50,500.
Which other places near Horley do you cover?
Everywhere around it, including Crawley (4.4 miles), Redhill (4.6 miles) and Reigate (4.8 miles), and the rest of Surrey.