Two-storey extensions in Thornton-Cleveleys
We design, get approval for and build two-storey extensions in Thornton-Cleveleys and the surrounding area. Choose the type of extension below or book a free site visit.
Thornton-Cleveleys at a glance
- Postcode districts
- FY5 and FY6
- Area
- Lancashire, England
- Price region
- North West England
- Nearest towns
- Cleveleys (0.8 miles), Poulton-le-Fylde (3.2 miles), Fleetwood (3.6 miles), Blackpool (4.1 miles)
- Distance to Preston
- about 15.1 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 Thornton-Cleveleys (FY5 and FY6) and the places around it, including Cleveleys (0.8 miles), Poulton-le-Fylde (3.2 miles) and Fleetwood.
Extensions available in Thornton-Cleveleys
Two-storey rear extensions
Our North West England guide starts at £53,000 for this type.
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Two-storey side extensions
Our North West England guide starts at £82,000 for this type.
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Two-storey wraparound extensions
Thornton-Cleveleys guide price from £114,500, Standard spec.
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Part single, part two-storey extensions
Design, approvals and build for Thornton-Cleveleys homes. Guide from £68,500.
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Extensions over a garage
Design, approvals and build for Thornton-Cleveleys homes. Guide from £30,000.
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First-floor extensions
Design, approvals and build for Thornton-Cleveleys homes. Guide from £24,000.
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Two-storey extensions for semi-detached houses
Thornton-Cleveleys guide price from £53,000, Standard spec.
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Two-storey extensions for detached houses
Design, approvals and build for Thornton-Cleveleys homes. Guide from £82,000.
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Kitchen extensions with bedrooms above
Thornton-Cleveleys guide price from £53,000 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
For homes in Thornton-Cleveleys: typical guide from £53,000 (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 Lancashire
- 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 Thornton-Cleveleys
Thornton-Cleveleys 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 Thornton-Cleveleys
Do you cover Thornton-Cleveleys?
Yes. We cover Thornton-Cleveleys (FY5 and FY6) and the surrounding area, including Cleveleys and Poulton-le-Fylde. The first site visit is free.
What does a two-storey extension cost in Thornton-Cleveleys?
Using our North West 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 £53,000–£72,000 including VAT. An extension over a garage is about £30,000–£43,500.
Which other places near Thornton-Cleveleys do you cover?
Everywhere around it, including Cleveleys (0.8 miles), Poulton-le-Fylde (3.2 miles) and Fleetwood (3.6 miles), and the rest of Lancashire.