Hemel Hempstead, Hertfordshire
Wraparound extension in Hemel Hempstead
An L-shaped extension that fills the side return and runs across the back. If you live in Hemel Hempstead and want to know what a wraparound extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Hemel Hempstead and its postcode districts HP1, HP2 and HP3 are part of our Hertfordshire coverage. Wraparounds are the natural next step for the end-of-terrace and Victorian houses in Hertfordshire where a side return alone would leave the room too narrow.
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 Hemel Hempstead?
Guide prices for a wraparound extension in Hemel Hempstead start from our East of England rate of £2,330–£3,820 per square metre, including VAT. East of England prices run slightly above our West Midlands baseline; clay soils near trees are the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £51,500–£84,000 |
| L-shaped, about 30 m² of new floor | £70,000–£114,500 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a wraparound extension in Hemel Hempstead?
Here is how the rules in England apply to a wraparound extension in Hemel Hempstead.
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. 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 Hemel Hempstead like to extend?
Post-war semis and newer estates are typical of Hemel Hempstead, and many have room for a full-width extension. Shrinkable clay is common in the East of England, so foundations near trees and hedges are designed to NHBC-style depth guidance.
How a wraparound extension in Hemel Hempstead 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
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.
Wraparound extensions near Hemel Hempstead
From Hemel Hempstead, the nearest places we also cover are Abbots Langley (3.6 miles) and Berkhamsted (5.0 miles).
- Wraparound extension in Abbots Langley
- Wraparound extension in Berkhamsted
- Wraparound extension in St Albans
- Wraparound extension in North Watford
- Wraparound extension in Harpenden
Other work in Hemel Hempstead:
FAQ
Wraparound extension questions in Hemel Hempstead
Can you match the brick or stone on my Hemel Hempstead house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do you handle building control in Hemel Hempstead?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Can the corner be all glass?
Yes, with a steel or aluminium post or a structural glass corner. It needs careful thermal detailing to meet Building Regulations.
What postcode areas do you cover around Hemel Hempstead?
Including HP1, HP2 and HP3, and the surrounding Hertfordshire area.
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.
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.