Worthing, West Sussex
Side return extension in Worthing
We plan and build side return extensions for homeowners in Worthing. Infilling the narrow passage beside a Victorian or Edwardian back addition. Start with a free site visit, then a written price once the design is agreed.
We cover Worthing (BN11, BN12, BN13 and BN14) as part of our West Sussex work. Side return projects in Worthing usually start with a drainage survey of the side passage.
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 side return extension cost in Worthing?
In Worthing, our guide for a side return extension is £2,580–£4,260 per square metre including VAT for a standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £31,000–£51,000 |
| 2.5 m wide × 7 m deep (17.5 m²) | £45,000–£74,500 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a side return extension in Worthing?
The planning route for a side return extension in Worthing is set by England's householder rules and your council.
In England the side part of a side return or wraparound must meet the side-extension rules (one storey, under 4 metres high, no more than half the width of the original house), and those rights do not apply on designated land. Because a wraparound combines a side and a rear extension, many need householder planning permission.
Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.
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 Worthing like to extend?
Commuter semis and detached houses make up much of Worthing, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a side return extension in Worthing 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.
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.
Side return extensions near Worthing
We also build side return extensions in nearby Lancing (2.4 miles) and Shoreham-by-Sea (4.6 miles).
- Side return extension in Lancing
- Side return extension in Shoreham-by-Sea
- Side return extension in Rustington
- Side return extension in Portslade
- Side return extension in Littlehampton
Other work in Worthing:
FAQ
Side return extension questions in Worthing
What postcode areas do you cover around Worthing?
Including BN11, BN12, BN13 and BN14, and the surrounding West Sussex area.
Is the site visit in Worthing free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Is a side return permitted development?
Sometimes, as a side extension within the width and height limits, but not in conservation areas, and many terraces are in one.
How long does a rear extension take to build in Worthing?
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.
Can you match the brick or stone on my Worthing house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.