Two-storey extensions in Northwich
We design, get approval for and build two-storey extensions in Northwich and the surrounding area. Choose the type of extension below or book a free site visit.
Northwich at a glance
- Postcode districts
- CW8 and CW9
- Area
- Cheshire, England
- Price region
- North West England
- Nearest towns
- Winsford (4.7 miles), Middlewich (5.5 miles), Knutsford (6.7 miles), Lymm (8.6 miles)
- Distance to Warrington
- about 9.6 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 Northwich (CW8 and CW9) and the places around it, including Winsford (4.7 miles), Middlewich (5.5 miles) and Knutsford.
Extensions available in Northwich
Two-storey rear extensions
Design, approvals and build for Northwich homes. Guide from £53,000.
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Two-storey side extensions
From £82,000 in Northwich. Free visit to firm it up.
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Two-storey wraparound extensions
Design, approvals and build for Northwich homes. Guide from £114,500.
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Part single, part two-storey extensions
For homes in Northwich: typical guide from £68,500.
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Extensions over a garage
Guide from £30,000 in Northwich, including VAT.
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First-floor extensions
For homes in Northwich: typical guide from £24,000.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Northwich homes. Guide from £53,000.
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Two-storey extensions for detached houses
For homes in Northwich: typical guide from £82,000.
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Kitchen extensions with bedrooms above
From £53,000 (before kitchen units) in Northwich. Free visit to firm it up.
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Extra bedroom and en-suite extensions
For homes in Northwich: 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 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 Northwich
Northwich 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 Northwich
Do you cover Northwich?
Yes. We cover Northwich (CW8 and CW9) and the surrounding area, including Winsford and Middlewich. The first site visit is free.
What does a two-storey extension cost in Northwich?
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 Northwich do you cover?
Everywhere around it, including Winsford (4.7 miles), Middlewich (5.5 miles) and Knutsford (6.7 miles), and the rest of Cheshire.