Eastbourne, East Sussex
Rear extension planning drawings in Eastbourne
We plan and build rear extensions for homeowners in Eastbourne. Measured survey, design options, planning drawings and the application, handled for you. Start with a free site visit, then a written price once the design is agreed.
Eastbourne sits in East Sussex, with postcode districts including BN20, BN21 and BN23. For Eastbourne 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 Eastbourne?
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. These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a rear extension in Eastbourne?
Whether your rear extension in Eastbourne 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. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Eastbourne like to extend?
Eastbourne has a mix of Victorian terraces near the centre and larger Edwardian and inter-war houses further out. Clay soils across much of the South East mean deeper foundations near trees, which we plan for at the survey.
How a rear extension in Eastbourne 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.
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 Eastbourne
From Eastbourne, the nearest places we also cover are Hailsham (6.6 miles) and Seaford (7.9 miles).
- Rear extension planning drawings in Hailsham
- Rear extension planning drawings in Seaford
- Rear extension planning drawings in Bexhill-on-Sea
- Rear extension planning drawings in Newhaven
- Rear extension planning drawings in Peacehaven
Other work in Eastbourne:
FAQ
Rear extension planning drawings questions in Eastbourne
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
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.
Can I see the design in 3D?
Yes; we produce simple 3D views so you can judge the size and light.
Do you handle building control in Eastbourne?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
What do rear extension planning drawings cost in Eastbourne?
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 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.