Two-storey extensions in Whiston
We design, get approval for and build two-storey extensions in Whiston and the surrounding area. Choose the type of extension below or book a free site visit.
Whiston at a glance
- Postcode districts
- L35
- Area
- Merseyside, England
- Price region
- North West England
- Nearest towns
- Prescot (0.8 miles), Rainhill (1 mile), Huyton (2.2 miles), St Helens (3.1 miles)
- Distance to Liverpool
- about 7.8 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.
Whiston sits about 7.8 miles from Liverpool. Closer to home, Prescot is 0.8 miles away and Rainhill 1.0 miles.
Extensions available in Whiston
Two-storey rear extensions
Design, approvals and build for Whiston homes. Guide from £53,000.
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Two-storey side extensions
Guide from £82,000 in Whiston, including VAT.
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Two-storey wraparound extensions
Our North West England guide starts at £114,500 for this type.
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Part single, part two-storey extensions
From £68,500 in Whiston. Free visit to firm it up.
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Extensions over a garage
Whiston guide price from £30,000, Standard spec.
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First-floor extensions
Our North West England guide starts at £24,000 for this type.
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Two-storey extensions for semi-detached houses
Our North West England guide starts at £53,000 for this type.
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Two-storey extensions for detached houses
Design, approvals and build for Whiston homes. Guide from £82,000.
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Kitchen extensions with bedrooms above
From £53,000 (before kitchen units) in Whiston. Free visit to firm it up.
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Extra bedroom and en-suite extensions
From £53,000 (plus en-suite) in Whiston. Free visit to firm it up.
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 Whiston we also design annexes, home offices and bedrooms over garages.
Also available in Merseyside
- 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 Whiston
Whiston 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 Whiston
Do you cover Whiston?
Yes. We cover Whiston (L35) and the surrounding area, including Prescot and Rainhill. The first site visit is free.
What does a two-storey extension cost in Whiston?
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 Whiston do you cover?
Everywhere around it, including Prescot (0.8 miles), Rainhill (1 mile) and Huyton (2.2 miles), and the rest of Merseyside.