High Wycombe, Buckinghamshire
Side return extension in High Wycombe
Thinking about a side return extension in High Wycombe? Infilling the narrow passage beside a Victorian or Edwardian back addition. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
High Wycombe and its postcode districts HP11, HP12 and HP13 are part of our Buckinghamshire coverage. Side return projects in High Wycombe 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 High Wycombe?
In High Wycombe, 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 |
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 side return extension in High Wycombe?
Here is how the rules in England apply to a side return extension in High Wycombe.
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 High Wycombe like to extend?
Commuter semis and detached houses make up much of High Wycombe, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a side return extension in High Wycombe 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.
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.
Side return extensions near High Wycombe
Neighbouring places we cover include Marlow (4.3 miles) and Beaconsfield (4.5 miles).
- Side return extension in Marlow
- Side return extension in Beaconsfield
- Side return extension in Amersham
- Side return extension in Amersham on the Hill
- Side return extension in Burnham
Other work in High Wycombe:
FAQ
Side return extension questions in High Wycombe
Is the site visit in High Wycombe free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
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.
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.
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 postcode areas do you cover around High Wycombe?
Including HP11, HP12 and HP13, and the surrounding Buckinghamshire area.
Do you handle building control in High Wycombe?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.