New Mills, Derbyshire
Two-storey rear extension in New Mills
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in New Mills and the surrounding area, with one contract from the first survey to building control sign-off.
New Mills sits in Derbyshire, with postcode districts including SK22. Two-storey rear extensions suit semi-detached houses in New Mills best, where the extra bedroom matters as much as the bigger kitchen.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in New Mills?
For New Mills we work from the East Midlands rate: £1,750–£2,620 per square metre of new floor, including VAT, standard specification. East Midlands prices sit a little below our West Midlands baseline.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £52,500–£78,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £84,000–£125,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a two-storey rear extension in New Mills?
Planning for a two-storey rear extension in New Mills follows the English householder rules.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in New Mills like to extend?
Red-brick terraces and semis are typical of New Mills. Coal-mining legacy areas in parts of the East Midlands can need a Coal Authority check before foundations are designed.
How a two-storey rear extension in New Mills comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Two-storey rear extensions near New Mills
We also build two-storey rear extensions in nearby Marple (3.3 miles) and Poynton (4.9 miles).
- Two-storey rear extension in Marple
- Two-storey rear extension in Poynton
- Two-storey rear extension in Hazel Grove
- Two-storey rear extension in Glossop
- Two-storey rear extension in Bredbury
Other work in New Mills:
FAQ
Two-storey rear extension questions in New Mills
Is the site visit in New Mills free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Is two-storey cheaper per square metre than single-storey?
Usually yes, because the foundations and roof are shared across twice the floor area. The total cost is higher.
Can you match the brick or stone on my New Mills house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What postcode areas do you cover around New Mills?
Including SK22, and the surrounding Derbyshire area.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.