Two-storey extensions in Thorne
Homeowners in Thorne can use us for the whole project or just the drawings and approvals. Start with a free visit.
Thorne at a glance
- Postcode districts
- DN8
- Area
- South Yorkshire, England
- Price region
- Yorkshire and the Humber
- Nearest towns
- Kirk Sandall (5.5 miles), Armthorpe (6.4 miles), Goole (7.3 miles), Doncaster (9.2 miles)
- Distance to Sheffield
- about 26 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.
Thorne sits about 26.0 miles from Sheffield. Closer to home, Kirk Sandall is 5.5 miles away and Armthorpe 6.4 miles.
Extensions available in Thorne
Two-storey rear extensions
Design, approvals and build for Thorne homes. Guide from £51,500.
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Two-storey side extensions
Guide from £79,000 in Thorne, including VAT.
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Two-storey wraparound extensions
Thorne guide price from £111,000, Standard spec.
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Part single, part two-storey extensions
From £66,000 in Thorne. Free visit to firm it up.
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Extensions over a garage
Design, approvals and build for Thorne homes. Guide from £29,000.
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First-floor extensions
From £23,000 in Thorne. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Guide from £51,500 in Thorne, including VAT.
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Two-storey extensions for detached houses
Our Yorkshire and the Humber guide starts at £79,000 for this type.
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Kitchen extensions with bedrooms above
Guide from £51,500 (before kitchen units) in Thorne, including VAT.
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Extra bedroom and en-suite extensions
Guide from £51,500 (plus en-suite) in Thorne, including VAT.
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 Thorne we also design annexes, home offices and bedrooms over garages.
Also available in South Yorkshire
- 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 Thorne
Thorne 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 Thorne
Do you cover Thorne?
Yes. We cover Thorne (DN8) and the surrounding area, including Kirk Sandall and Armthorpe. The first site visit is free.
What does a two-storey extension cost in Thorne?
Using our Yorkshire and the Humber 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 £51,500–£69,500 including VAT. An extension over a garage is about £29,000–£42,000.
Which other places near Thorne do you cover?
Everywhere around it, including Kirk Sandall (5.5 miles), Armthorpe (6.4 miles) and Goole (7.3 miles), and the rest of South Yorkshire.