Cheltenham, Gloucestershire
Rear extension planning drawings in Cheltenham
Measured survey, design options, planning drawings and the application, handled for you. If you live in Cheltenham and want to know what a rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Cheltenham is covered from our Gloucestershire round, including GL50, GL51 and GL53. Planning applications in Cheltenham go to the local planning authority covering Cheltenham, 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 Cheltenham?
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 Cheltenham?
Whether your rear extension in Cheltenham needs a planning application depends on its size, your house and any local restrictions.
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. 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 Cheltenham like to extend?
Cheltenham has Victorian terraces nearer the centre and post-war semis on the edges. Sloping gardens are frequent, which affects floor levels and steps down to the patio.
How a rear extension in Cheltenham 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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 Cheltenham
Close by, we work in Charlton Kings, about 2.0 miles away, and Bishops Cleeve, about 3.4 miles away.
- Rear extension planning drawings in Charlton Kings
- Rear extension planning drawings in Bishops Cleeve
- Rear extension planning drawings in Churchdown
- Rear extension planning drawings in Tewkesbury
- Rear extension planning drawings in Gloucester
Other work in Cheltenham:
FAQ
Rear extension planning drawings questions in Cheltenham
What postcode areas do you cover around Cheltenham?
Including GL50, GL51 and GL53, and the surrounding Gloucestershire 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.
Can planning conditions affect the build?
Yes, for example matching materials or obscure glazing. We plan for them.
What do rear extension planning drawings cost in Cheltenham?
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.
How long does a rear extension take to build in Cheltenham?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Do I need planning permission for a rear extension in Cheltenham?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.