Corby, Northamptonshire
Rear extension planning drawings in Corby
Rear extension planning drawings in Corby: measured survey, design options, planning drawings and the application, handled for you. We measure the house, show you what the rules allow, price it in writing and build it.
Corby is covered from our Northamptonshire round, including NN17 and NN18. Planning applications in Corby go to the local planning authority covering Corby, and we check its local design guidance for rear extensions before drawing.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
What do rear extension planning drawings cost in Corby?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension, or £2,000–£3,500 for a two-storey scheme. 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. 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 rear extension in Corby?
Planning for a rear extension in Corby 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.
Councils aim to decide householder applications within 8 weeks of validation, and prior approval within 42 days.
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 Corby like to extend?
Corby has plenty of inter-war semis and bungalows, and single-storey rear extensions suit both.
How a rear extension in Corby 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.
Rear extension planning drawings near Corby
Close by, we work in Desborough, about 6.7 miles away, and Kettering, about 6.9 miles away.
- Rear extension planning drawings in Desborough
- Rear extension planning drawings in Kettering
- Rear extension planning drawings in Market Harborough
- Rear extension planning drawings in Oakham
- Rear extension planning drawings in Wellingborough
Other work in Corby:
FAQ
Rear extension planning drawings questions in Corby
What do rear extension planning drawings cost in Corby?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension and £2,000–£3,500 for a two-storey scheme, covering the measured survey, design options and the application. The council fee is extra.
Do you handle building control in Corby?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
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.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
What postcode areas do you cover around Corby?
Including NN17 and NN18, and the surrounding Northamptonshire area.
Can you match the brick or stone on my Corby house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.