Two-storey extensions in Keswick
Homeowners in Keswick can use us for the whole project or just the drawings and approvals. Start with a free visit.
Keswick at a glance
- Postcode districts
- CA12
- Area
- Cumbria, England
- Price region
- North West England
- Nearest towns
- Cockermouth (10.1 miles), Wigton (15.6 miles), Penrith (15.7 miles), Cleator Moor (16.3 miles)
- Distance to Carlisle
- about 21.8 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.
Around Keswick we also work in Cockermouth, Wigton and Penrith, and across the rest of Cumbria. Postcode district in and near Keswick: CA12.
Extensions available in Keswick
Two-storey rear extensions
Our North West England guide starts at £53,000 for this type.
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Two-storey side extensions
Guide from £82,000 in Keswick, including VAT.
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Two-storey wraparound extensions
For homes in Keswick: typical guide from £114,500.
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Part single, part two-storey extensions
Keswick guide price from £68,500, Standard spec.
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Extensions over a garage
Design, approvals and build for Keswick homes. Guide from £30,000.
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First-floor extensions
Keswick guide price from £24,000, Standard spec.
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Two-storey extensions for semi-detached houses
For homes in Keswick: typical guide from £53,000.
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Two-storey extensions for detached houses
Design, approvals and build for Keswick homes. Guide from £82,000.
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Kitchen extensions with bedrooms above
Guide from £53,000 (before kitchen units) in Keswick, including VAT.
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Extra bedroom and en-suite extensions
Guide from £53,000 (plus en-suite) in Keswick, including VAT.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Keswick, with a rough idea of the approval route and cost for each.
Also available in Cumbria
- 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 Keswick
Keswick 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 Keswick
Do you cover Keswick?
Yes. We cover Keswick (CA12) and the surrounding area, including Cockermouth and Wigton. The first site visit is free.
What does a two-storey extension cost in Keswick?
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 Keswick do you cover?
Everywhere around it, including Cockermouth (10.1 miles), Wigton (15.6 miles) and Penrith (15.7 miles), and the rest of Cumbria.