Two-storey extensions in Dorking
Need more room in Dorking? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Dorking at a glance
- Postcode districts
- RH3, RH4 and RH5
- Area
- Surrey, England
- Price region
- South East England
- Nearest towns
- Great Bookham (3.7 miles), Leatherhead (4.4 miles), Ashtead (5.5 miles), Reigate (5.5 miles)
- Distance to Woking
- about 11.4 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 Dorking we also work in Great Bookham, Leatherhead and Ashtead, and across the rest of Surrey. Postcode districts in and near Dorking: RH3, RH4 and RH5.
Extensions available in Dorking
Two-storey rear extensions
Dorking guide price from £61,500, Standard spec.
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Two-storey side extensions
Design, approvals and build for Dorking homes. Guide from £94,500.
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Two-storey wraparound extensions
Guide from £132,500 in Dorking, including VAT.
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Part single, part two-storey extensions
Design, approvals and build for Dorking homes. Guide from £79,000.
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Extensions over a garage
Guide from £34,500 in Dorking, including VAT.
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First-floor extensions
From £27,500 in Dorking. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Dorking guide price from £61,500, Standard spec.
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Two-storey extensions for detached houses
Our South East England guide starts at £94,500 for this type.
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Kitchen extensions with bedrooms above
For homes in Dorking: typical guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Our South East England guide starts at £61,500 (plus en-suite) for this type.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Dorking, with a rough idea of the approval route and cost for each.
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 Dorking
Dorking 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 Dorking
Do you cover Dorking?
Yes. We cover Dorking (RH3, RH4 and RH5) and the surrounding area, including Great Bookham and Leatherhead. The first site visit is free.
What does a two-storey extension cost in Dorking?
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 Dorking do you cover?
Everywhere around it, including Great Bookham (3.7 miles), Leatherhead (4.4 miles) and Ashtead (5.5 miles), and the rest of Surrey.