Cumbria
Rear extension plans and planning applications in Cumbria
Measured survey, design options, planning drawings and the application, handled for you. We design and build rear extensions across Cumbria, from Carlisle and Barrow in Furness to Kendal, covering single-storey kitchen extensions, two-storey additions, side returns and wraparounds.
Rear extension applications in Cumbria are householder applications, which councils aim to decide within about eight weeks. Stone and brick terraces are common around Cumbria. Where houses back onto a ginnel or alley, deliveries can come in from the rear, which makes the build tidier.
What does it cost in Cumbria?
As a guide, £1,000–£2,500 including VAT. Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission in Cumbria?
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent.
A householder planning application in England costs £548 (£575 for applications made from 8 December 2026), and a lawful development certificate for proposed work costs half the householder fee.
Councils aim to decide householder applications within 8 weeks of validation, and prior approval within 42 days.
Where in Cumbria do we work?
FAQ
Questions people ask
Do I need an architect?
You need accurate drawings by someone who knows householder planning; we provide them.
Can I see the design in 3D?
Yes; we produce simple 3D views so you can judge the size and light.
What if planning is refused?
We review the reasons with you, amend and resubmit (often free of a second fee within 12 months in England) or appeal.
Do you cover all of Cumbria?
We cover 7 towns and districts in Cumbria, including Carlisle, Barrow in Furness and Kendal.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.