Grantham, Lincolnshire
Rear extension planning drawings in Grantham
Rear extension planning drawings in Grantham: 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.
Grantham and its postcode districts NG31 are part of our Lincolnshire coverage. For Grantham homes we start with a measured survey, then draw options before anything is submitted.
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 Grantham?
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 Grantham?
The planning route for a rear extension in Grantham is set by England's householder rules and your council.
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.
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 Grantham like to extend?
Grantham has plenty of inter-war semis and bungalows, and single-storey rear extensions suit both.
How a rear extension in Grantham comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Rear extension planning drawings near Grantham
Neighbouring places we cover include Sleaford (11.4 miles) and Newark on Trent (13.0 miles).
- Rear extension planning drawings in Sleaford
- Rear extension planning drawings in Newark on Trent
- Rear extension planning drawings in Melton Mowbray
- Rear extension planning drawings in Bourne
- Rear extension planning drawings in Oakham
Other work in Grantham:
FAQ
Rear extension planning drawings questions in Grantham
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.
Can you match the brick or stone on my Grantham house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do neighbours get consulted?
Yes for a full application: the council writes to them or puts up a site notice.
Is the site visit in Grantham free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
What do rear extension planning drawings cost in Grantham?
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 Grantham?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.