Two-storey extensions in Crowthorne
Planning a bigger home in Crowthorne? Compare extension types and guide prices below, then book a free site visit.
Crowthorne at a glance
- Postcode districts
- RG45
- Area
- Berkshire, England
- Price region
- South East England
- Nearest towns
- Sandhurst (1.6 miles), Yateley (2.5 miles), Camberley (3.1 miles), Wokingham (3.4 miles)
- Distance to Reading
- about 9.7 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.
We cover postcode district RG45 in and around Crowthorne, along with neighbouring Sandhurst, Yateley and Camberley.
Extensions available in Crowthorne
Two-storey rear extensions
Design, approvals and build for Crowthorne homes. Guide from £61,500.
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Two-storey side extensions
From £94,500 in Crowthorne. Free visit to firm it up.
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Two-storey wraparound extensions
From £132,500 in Crowthorne. Free visit to firm it up.
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Part single, part two-storey extensions
Our South East England guide starts at £79,000 for this type.
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Extensions over a garage
Crowthorne guide price from £34,500, Standard spec.
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First-floor extensions
From £27,500 in Crowthorne. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Crowthorne guide price from £61,500, Standard spec.
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Two-storey extensions for detached houses
Crowthorne guide price from £94,500, Standard spec.
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Kitchen extensions with bedrooms above
From £61,500 (before kitchen units) in Crowthorne. Free visit to firm it up.
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Extra bedroom and en-suite extensions
For homes in Crowthorne: typical guide from £61,500 (plus en-suite).
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 Berkshire
- 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 Crowthorne
Crowthorne 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 Crowthorne
Do you cover Crowthorne?
Yes. We cover Crowthorne (RG45) and the surrounding area, including Sandhurst and Yateley. The first site visit is free.
What does a two-storey extension cost in Crowthorne?
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 Crowthorne do you cover?
Everywhere around it, including Sandhurst (1.6 miles), Yateley (2.5 miles) and Camberley (3.1 miles), and the rest of Berkshire.