Desborough, Northamptonshire
Rear extension planning drawings in Desborough
Thinking about a rear extension in Desborough? Measured survey, design options, planning drawings and the application, handled for you. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Desborough sits in Northamptonshire, with postcode districts including LE16. Rear extension applications in Northamptonshire are householder applications, which councils aim to decide within about eight weeks.
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 Desborough?
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. Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a rear extension in Desborough?
Whether your rear extension in Desborough needs a planning application depends on its size, your house and any local restrictions.
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. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Desborough like to extend?
Desborough has plenty of inter-war semis and bungalows, and single-storey rear extensions suit both.
How a rear extension in Desborough comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Rear extension planning drawings near Desborough
Close by, we work in Market Harborough, about 4.9 miles away, and Kettering, about 5.0 miles away.
- Rear extension planning drawings in Market Harborough
- Rear extension planning drawings in Kettering
- Rear extension planning drawings in Corby
- Rear extension planning drawings in Wellingborough
- Rear extension planning drawings in Northampton
Other work in Desborough:
FAQ
Rear extension planning drawings questions in Desborough
Is the site visit in Desborough free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What postcode areas do you cover around Desborough?
Including LE16, and the surrounding Northamptonshire area.
Can I see the design in 3D?
Yes; we produce simple 3D views so you can judge the size and light.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
What do rear extension planning drawings cost in Desborough?
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 Desborough?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.