Two-storey extensions in Ashford (Surrey)
Everything for a two-storey extension in Ashford (Surrey), in one place: types, guide prices for South East England, the approval rules in England and how to get started.
Ashford (Surrey) at a glance
- Postcode districts
- TW15
- Area
- Surrey, England
- Price region
- South East England
- Nearest towns
- Stanwell (1.8 miles), Staines (2.1 miles), Feltham (2.1 miles), Shepperton (2.5 miles)
- Distance to Woking
- about 8.9 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 Ashford (Surrey) (TW15) and the places around it, including Stanwell (1.8 miles), Staines (2.1 miles) and Feltham.
Extensions available in Ashford (Surrey)
Two-storey rear extensions
Guide from £61,500 in Ashford (Surrey), including VAT.
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Two-storey side extensions
From £94,500 in Ashford (Surrey). Free visit to firm it up.
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Two-storey wraparound extensions
For homes in Ashford (Surrey): typical guide from £132,500.
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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
Guide from £34,500 in Ashford (Surrey), including VAT.
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First-floor extensions
Design, approvals and build for Ashford (Surrey) homes. Guide from £27,500.
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Two-storey extensions for semi-detached houses
Guide from £61,500 in Ashford (Surrey), including VAT.
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Two-storey extensions for detached houses
From £94,500 in Ashford (Surrey). Free visit to firm it up.
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Kitchen extensions with bedrooms above
Design, approvals and build for Ashford (Surrey) homes. Guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Design, approvals and build for Ashford (Surrey) homes. Guide from £61,500 (plus en-suite).
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Surrey, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
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 Ashford (Surrey)
Ashford (Surrey) 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 Ashford (Surrey)
Do you cover Ashford (Surrey)?
Yes. We cover Ashford (Surrey) (TW15) and the surrounding area, including Stanwell and Staines. The first site visit is free.
What does a two-storey extension cost in Ashford (Surrey)?
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 Ashford (Surrey) do you cover?
Everywhere around it, including Stanwell (1.8 miles), Staines (2.1 miles) and Feltham (2.1 miles), and the rest of Surrey.