Two-storey extensions in Durham
Planning a bigger home in Durham? Compare extension types and guide prices below, then book a free site visit.
Durham at a glance
- Postcode districts
- DH1
- Area
- County Durham, England
- Price region
- North East England
- Nearest towns
- Brandon (2.5 miles), Spennymoor (5.5 miles), Chester-le-Street (5.7 miles), Hetton-le-Hole (5.7 miles)
- Distance to Darlington
- about 17.5 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.
Durham sits about 17.5 miles from Darlington. Closer to home, Brandon is 2.5 miles away and Spennymoor 5.5 miles.
Extensions available in Durham
Two-storey rear extensions
For homes in Durham: typical guide from £50,500.
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Two-storey side extensions
Design, approvals and build for Durham homes. Guide from £77,500.
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Two-storey wraparound extensions
Design, approvals and build for Durham homes. Guide from £108,500.
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Part single, part two-storey extensions
Guide from £65,000 in Durham, including VAT.
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Extensions over a garage
Design, approvals and build for Durham homes. Guide from £28,500.
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First-floor extensions
Guide from £22,500 in Durham, including VAT.
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Two-storey extensions for semi-detached houses
For homes in Durham: typical guide from £50,500.
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Two-storey extensions for detached houses
Our North East England guide starts at £77,500 for this type.
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Kitchen extensions with bedrooms above
For homes in Durham: typical guide from £50,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Design, approvals and build for Durham homes. Guide from £50,500 (plus en-suite).
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 Durham we also design annexes, home offices and bedrooms over garages.
Also available in County Durham
- 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 Durham
Durham 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 Durham
Do you cover Durham?
Yes. We cover Durham (DH1) and the surrounding area, including Brandon and Spennymoor. The first site visit is free.
What does a two-storey extension cost in Durham?
Using our North East 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 £50,500–£68,000 including VAT. An extension over a garage is about £28,500–£41,500.
Which other places near Durham do you cover?
Everywhere around it, including Brandon (2.5 miles), Spennymoor (5.5 miles) and Chester-le-Street (5.7 miles), and the rest of County Durham.