Two-storey extensions in Stockton-on-Tees
Homeowners in Stockton-on-Tees can use us for the whole project or just the drawings and approvals. Start with a free visit.
Stockton-on-Tees at a glance
- Postcode districts
- TS18, TS19 and TS21
- Area
- County Durham, England
- Price region
- North East England
- Nearest towns
- Billingham (1.8 miles), Thornaby-on-Tees (2.5 miles), Middlesbrough (3.4 miles), Yarm (4.8 miles)
- Distance to Darlington
- about 9.8 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.
We cover postcode districts TS18, TS19 and TS21 in and around Stockton-on-Tees, along with neighbouring Billingham, Thornaby-on-Tees and Middlesbrough.
Extensions available in Stockton-on-Tees
Two-storey rear extensions
Design, approvals and build for Stockton-on-Tees homes. Guide from £50,500.
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Two-storey side extensions
Design, approvals and build for Stockton-on-Tees homes. Guide from £77,500.
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Two-storey wraparound extensions
Guide from £108,500 in Stockton-on-Tees, including VAT.
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Part single, part two-storey extensions
Stockton-on-Tees guide price from £65,000, Standard spec.
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Extensions over a garage
Our North East England guide starts at £28,500 for this type.
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First-floor extensions
Design, approvals and build for Stockton-on-Tees homes. Guide from £22,500.
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Two-storey extensions for semi-detached houses
Guide from £50,500 in Stockton-on-Tees, including VAT.
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Two-storey extensions for detached houses
From £77,500 in Stockton-on-Tees. Free visit to firm it up.
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Kitchen extensions with bedrooms above
For homes in Stockton-on-Tees: 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 County Durham, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
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 Stockton-on-Tees
Stockton-on-Tees 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 Stockton-on-Tees
Do you cover Stockton-on-Tees?
Yes. We cover Stockton-on-Tees (TS18, TS19 and TS21) and the surrounding area, including Billingham and Thornaby-on-Tees. The first site visit is free.
What does a two-storey extension cost in Stockton-on-Tees?
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 Stockton-on-Tees do you cover?
Everywhere around it, including Billingham (1.8 miles), Thornaby-on-Tees (2.5 miles) and Middlesbrough (3.4 miles), and the rest of County Durham.