Sunbury-on-Thames, Surrey
Wraparound extension in Sunbury-on-Thames
Wraparound extension in Sunbury-on-Thames: an L-shaped extension that fills the side return and runs across the back. We measure the house, show you what the rules allow, price it in writing and build it.
Sunbury-on-Thames and its postcode districts KT12, TW16 and TW17 are part of our Surrey coverage. Wraparound projects around Sunbury-on-Thames often involve two neighbours, so we start the party wall conversations early.
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 wraparound extension cost in Sunbury-on-Thames?
A wraparound extension in Sunbury-on-Thames is priced at £2,460–£4,030 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 |
|---|---|
| L-shaped, about 22 m² of new floor | £54,000–£88,500 |
| L-shaped, about 30 m² of new floor | £74,000–£121,000 |
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 wraparound extension in Sunbury-on-Thames?
Here is how the rules in England apply to a wraparound extension in Sunbury-on-Thames.
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. 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 Sunbury-on-Thames like to extend?
Commuter semis and detached houses make up much of Sunbury-on-Thames, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a wraparound extension in Sunbury-on-Thames comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
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.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Wraparound extensions near Sunbury-on-Thames
From Sunbury-on-Thames, the nearest places we also cover are Walton-on-Thames (1.2 miles) and Shepperton (1.5 miles).
- Wraparound extension in Walton-on-Thames
- Wraparound extension in Shepperton
- Wraparound extension in West Molesey
- Wraparound extension in Hampton
- Wraparound extension in Hanworth
Other work in Sunbury-on-Thames:
FAQ
Wraparound extension questions in Sunbury-on-Thames
Do you handle building control in Sunbury-on-Thames?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How long does a rear extension take to build in Sunbury-on-Thames?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Is it worth it over a side return alone?
If you want a dining table and a sofa as well as the kitchen, usually yes.
How much does a wraparound extension cost in Sunbury-on-Thames?
As a guide, £2,460–£4,030 per square metre including VAT for a standard specification. For example, L-shaped, about 22 m² of new floor: about £54,000–£88,500 at that rate. Your written price follows the survey.
Can you match the brick or stone on my Sunbury-on-Thames house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Is the site visit in Sunbury-on-Thames free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.