Two-storey extensions in Derby
Need more room in Derby? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Derby at a glance
- Postcode districts
- DE1, DE3 and DE22
- Area
- Derbyshire, England
- Price region
- East Midlands
- Nearest towns
- Chaddesden (1.8 miles), Oakwood (Derbyshire) (2.4 miles), Sinfin (2.9 miles), Belper (6.9 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 Derby (DE1, DE3 and DE22) and the places around it, including Chaddesden (1.8 miles), Oakwood (Derbyshire) (2.4 miles) and Sinfin.
Extensions available in Derby
Two-storey rear extensions
Our East Midlands guide starts at £55,000 for this type.
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Two-storey side extensions
From £84,500 in Derby. Free visit to firm it up.
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Two-storey wraparound extensions
Derby guide price from £118,000, Standard spec.
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Part single, part two-storey extensions
Derby guide price from £70,500, Standard spec.
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Extensions over a garage
From £31,000 in Derby. Free visit to firm it up.
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First-floor extensions
Design, approvals and build for Derby homes. Guide from £24,500.
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Two-storey extensions for semi-detached houses
Guide from £55,000 in Derby, including VAT.
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Two-storey extensions for detached houses
Our East Midlands guide starts at £84,500 for this type.
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Kitchen extensions with bedrooms above
Design, approvals and build for Derby homes. Guide from £55,000 (before kitchen units).
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Extra bedroom and en-suite extensions
From £55,000 (plus en-suite) in Derby. Free visit to firm it up.
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 Derbyshire
- 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 Derby
Derby 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 Derby
Do you cover Derby?
Yes. We cover Derby (DE1, DE3 and DE22) and the surrounding area, including Chaddesden and Oakwood (Derbyshire). The first site visit is free.
What does a two-storey extension cost in Derby?
Using our East Midlands 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 £55,000–£74,000 including VAT. An extension over a garage is about £31,000–£45,000.
Which other places near Derby do you cover?
Everywhere around it, including Chaddesden (1.8 miles), Oakwood (Derbyshire) (2.4 miles) and Sinfin (2.9 miles), and the rest of Derbyshire.