Allerton, Merseyside
Wraparound extension in Allerton
An L-shaped extension that fills the side return and runs across the back. If you live in Allerton 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.
We cover Allerton (L18, L19 and L25) as part of our Merseyside work. Wraparound projects around Allerton 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 Allerton?
Guide prices for a wraparound extension in Allerton start from our North West England rate of £2,070–£3,380 per square metre, including VAT. 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 Allerton?
Whether your wraparound extension in Allerton needs a planning application depends on its size, your house and any local restrictions.
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 Allerton like to extend?
Stone and brick terraces are common around Allerton. 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 Allerton 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.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
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 Allerton
We also build wraparound extensions in nearby Mossley Hill (1.0 miles) and Woolton (1.1 miles).
- Wraparound extension in Mossley Hill
- Wraparound extension in Woolton
- Wraparound extension in Hunts Cross
- Wraparound extension in Childwall
- Wraparound extension in Belle Vale
Other work in Allerton:
FAQ
Wraparound extension questions in Allerton
Is the site visit in Allerton free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
How much does a wraparound extension cost in Allerton?
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.
How long does a wraparound take?
Usually 14 to 20 weeks on site, longer than a plain rear extension because of the steelwork.
Do you handle building control in Allerton?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
What postcode areas do you cover around Allerton?
Including L18, L19 and L25, and the surrounding Merseyside area.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.