Shoreham-by-Sea, West Sussex
Rear extension planning drawings in Shoreham-by-Sea
Measured survey, design options, planning drawings and the application, handled for you. We design, get the approvals for and build rear extensions in Shoreham-by-Sea and the surrounding area, with one contract from the first survey to building control sign-off.
Shoreham-by-Sea is covered from our West Sussex round, including BN42 and BN43. Rear extension applications in West Sussex 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 Shoreham-by-Sea?
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 Shoreham-by-Sea?
Whether your rear extension in Shoreham-by-Sea 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 Shoreham-by-Sea like to extend?
Commuter semis and detached houses make up much of Shoreham-by-Sea, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a rear extension in Shoreham-by-Sea 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
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 Shoreham-by-Sea
From Shoreham-by-Sea, the nearest places we also cover are Lancing (2.1 miles) and Portslade (2.6 miles).
- Rear extension planning drawings in Lancing
- Rear extension planning drawings in Portslade
- Rear extension planning drawings in Worthing
- Rear extension planning drawings in Hove
- Rear extension planning drawings in Brighton
Other work in Shoreham-by-Sea:
FAQ
Rear extension planning drawings questions in Shoreham-by-Sea
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.
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.
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.
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 you match the brick or stone on my Shoreham-by-Sea house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
What postcode areas do you cover around Shoreham-by-Sea?
Including BN42 and BN43, and the surrounding West Sussex area.