Two-storey extensions in Blyth
Homeowners in Blyth can use us for the whole project or just the drawings and approvals. Start with a free visit.
Blyth at a glance
- Postcode districts
- NE24
- Area
- Northumberland, England
- Price region
- North East England
- Nearest towns
- Cowpen (1.3 miles), Bedlington (3.4 miles), Stakeford (3.5 miles), Newbiggin-by-the-Sea (4 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 Blyth we also work in Cowpen, Bedlington and Stakeford, and across the rest of Northumberland. Postcode district in and near Blyth: NE24.
Extensions available in Blyth
Two-storey rear extensions
From £50,500 in Blyth. Free visit to firm it up.
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Two-storey side extensions
Design, approvals and build for Blyth homes. Guide from £77,500.
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Two-storey wraparound extensions
Design, approvals and build for Blyth homes. Guide from £108,500.
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Part single, part two-storey extensions
Guide from £65,000 in Blyth, including VAT.
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Extensions over a garage
Guide from £28,500 in Blyth, including VAT.
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First-floor extensions
For homes in Blyth: typical guide from £22,500.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Blyth homes. Guide from £50,500.
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Two-storey extensions for detached houses
Blyth guide price from £77,500, Standard spec.
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Kitchen extensions with bedrooms above
For homes in Blyth: typical guide from £50,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Our North East England guide starts at £50,500 (plus en-suite) for this type.
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Northumberland, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
Also available in Northumberland
- 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 Blyth
Blyth 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 Blyth
Do you cover Blyth?
Yes. We cover Blyth (NE24) and the surrounding area, including Cowpen and Bedlington. The first site visit is free.
What does a two-storey extension cost in Blyth?
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 Blyth do you cover?
Everywhere around it, including Cowpen (1.3 miles), Bedlington (3.4 miles) and Stakeford (3.5 miles), and the rest of Northumberland.