St Helens, Merseyside
Wraparound extension in St Helens
Wraparound extension in St Helens: 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.
St Helens sits in Merseyside, with postcode districts including WA9, WA10 and WA11. Wraparound projects around St Helens 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 St Helens?
In St Helens, our guide for a wraparound extension is £2,070–£3,380 per square metre including VAT for a standard specification. North West prices sit below our West Midlands baseline; access on terraced streets is the main variable.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £45,500–£74,500 |
| L-shaped, about 30 m² of new floor | £62,000–£101,500 |
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 St Helens?
Here is how the rules in England apply to a wraparound extension in St Helens.
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 St Helens like to extend?
Stone and brick terraces are common around St Helens. Where houses back onto a ginnel or alley, deliveries can come in from the rear, which makes the build tidier.
How a wraparound extension in St Helens 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.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Wraparound extensions near St Helens
We also build wraparound extensions in nearby Haydock (2.4 miles) and Rainhill (2.7 miles).
- Wraparound extension in Haydock
- Wraparound extension in Rainhill
- Wraparound extension in Whiston
- Wraparound extension in Prescot
- Wraparound extension in Ashton in Makerfield
Other work in St Helens:
FAQ
Wraparound extension questions in St Helens
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.
Do I need planning permission for a rear extension in St Helens?
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.
Will it take a lot of garden?
Less than a deep rear extension of the same area, because part of the space comes from the side passage.
How much does a wraparound extension cost in St Helens?
As a guide, £2,070–£3,380 per square metre including VAT for a standard specification. For example, L-shaped, about 22 m² of new floor: about £45,500–£74,500 at that rate. Your written price follows the survey.
Can you match the brick or stone on my St Helens 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 St Helens free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.