Two-storey extensions in New Mills
Everything for a two-storey extension in New Mills, in one place: types, guide prices for the East Midlands, the approval rules in England and how to get started.
New Mills at a glance
- Postcode districts
- SK22 and SK23
- Area
- Derbyshire, England
- Price region
- East Midlands
- Nearest towns
- Marple (3.3 miles), Poynton (4.9 miles), Hazel Grove (5 miles), Glossop (5.7 miles)
- Distance to Derby
- about 37.5 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.
We cover postcode districts SK22 and SK23 in and around New Mills, along with neighbouring Marple, Poynton and Hazel Grove.
Extensions available in New Mills
Two-storey rear extensions
For homes in New Mills: typical guide from £55,000.
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Two-storey side extensions
Guide from £84,500 in New Mills, including VAT.
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Two-storey wraparound extensions
Our East Midlands guide starts at £118,000 for this type.
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Part single, part two-storey extensions
For homes in New Mills: typical guide from £70,500.
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Extensions over a garage
From £31,000 in New Mills. Free visit to firm it up.
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First-floor extensions
Our East Midlands guide starts at £24,500 for this type.
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Two-storey extensions for semi-detached houses
For homes in New Mills: typical guide from £55,000.
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Two-storey extensions for detached houses
Design, approvals and build for New Mills homes. Guide from £84,500.
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Kitchen extensions with bedrooms above
From £55,000 (before kitchen units) in New Mills. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Our East Midlands guide starts at £55,000 (plus en-suite) for this type.
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in New Mills, with a rough idea of the approval route and cost for each.
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 New Mills
New Mills 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 New Mills
Do you cover New Mills?
Yes. We cover New Mills (SK22 and SK23) and the surrounding area, including Marple and Poynton. The first site visit is free.
What does a two-storey extension cost in New Mills?
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 New Mills do you cover?
Everywhere around it, including Marple (3.3 miles), Poynton (4.9 miles) and Hazel Grove (5 miles), and the rest of Derbyshire.