Shoreham-by-Sea, West Sussex
Two-storey rear extension in Shoreham-by-Sea
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. If you live in Shoreham-by-Sea and want to know what a two-storey rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Shoreham-by-Sea and its postcode districts BN42 and BN43 are part of our West Sussex coverage. In Shoreham-by-Sea, a two-storey rear extension is worth comparing with the cost of moving once stamp duty, agents' and legal fees are counted.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in Shoreham-by-Sea?
A two-storey rear extension in Shoreham-by-Sea is priced at £2,020–£3,020 per square metre including VAT as a guide, before kitchen fit-out and fees. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £60,500–£90,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £97,000–£145,000 |
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 two-storey rear extension in Shoreham-by-Sea?
The planning route for a two-storey rear extension in Shoreham-by-Sea is set by England's householder rules and your council.
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.
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 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 two-storey rear extension in Shoreham-by-Sea 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.
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.
Two-storey rear extensions near Shoreham-by-Sea
We also build two-storey rear extensions in nearby Lancing (2.1 miles) and Portslade (2.6 miles).
- Two-storey rear extension in Lancing
- Two-storey rear extension in Portslade
- Two-storey rear extension in Worthing
- Two-storey rear extension in Hove
- Two-storey rear extension in Brighton
Other work in Shoreham-by-Sea:
FAQ
Two-storey rear extension questions in Shoreham-by-Sea
How long does a rear extension take to build in Shoreham-by-Sea?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.
What is the 45-degree rule?
Many councils check that a two-storey extension does not cross a 45-degree line drawn from the nearest habitable window of the neighbouring house. We test it at the first drawing.
Do I need planning permission for a rear extension in Shoreham-by-Sea?
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.
Is the site visit in Shoreham-by-Sea free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
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.