Two-storey extensions in Runcorn
Everything for a two-storey extension in Runcorn, in one place: types, guide prices for North West England, the approval rules in England and how to get started.
Runcorn at a glance
- Postcode districts
- WA6 and WA7
- Area
- Cheshire, England
- Price region
- North West England
- Nearest towns
- Widnes (1.4 miles), Halewood (4.3 miles), Speke (4.5 miles), Great Sankey (5.1 miles)
- Distance to Warrington
- about 7.1 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.
Runcorn sits about 7.1 miles from Warrington. Closer to home, Widnes is 1.4 miles away and Halewood 4.3 miles.
Extensions available in Runcorn
Two-storey rear extensions
For homes in Runcorn: typical guide from £53,000.
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Two-storey side extensions
Runcorn guide price from £82,000, Standard spec.
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Two-storey wraparound extensions
Runcorn guide price from £114,500, Standard spec.
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Part single, part two-storey extensions
From £68,500 in Runcorn. Free visit to firm it up.
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Extensions over a garage
For homes in Runcorn: typical guide from £30,000.
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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
Guide from £53,000 in Runcorn, including VAT.
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Two-storey extensions for detached houses
Guide from £82,000 in Runcorn, including VAT.
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Kitchen extensions with bedrooms above
Our North West England guide starts at £53,000 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
Design, approvals and build for Runcorn homes. Guide from £53,000 (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 Cheshire, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
Also available in Cheshire
- 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 Runcorn
Runcorn 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 Runcorn
Do you cover Runcorn?
Yes. We cover Runcorn (WA6 and WA7) and the surrounding area, including Widnes and Halewood. The first site visit is free.
What does a two-storey extension cost in Runcorn?
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 Runcorn do you cover?
Everywhere around it, including Widnes (1.4 miles), Halewood (4.3 miles) and Speke (4.5 miles), and the rest of Cheshire.