Two-storey wraparound extensions in Newton-le-Willows
For a two-storey wraparound extension in Newton-le-Willows, the first questions are always the same: how big, which approvals, and what it will cost. This page answers all three for Merseyside.
What we'd confirm first for a project in Newton-le-Willows.
- Postcode districts
- WA12
- County / area
- Merseyside, England
- Price region
- North West England
- Guide price
- £114,500–£157,000 (£2,040–£2,800 per m²)
- Approval route
- Planning permission is needed: the side part takes it outside permitted development in England.
- Nearest towns
- Golborne (1.9 miles), Ashton-in-Makerfield (3.1 miles), Haydock (3.6 miles)
- Distance to Liverpool
- about 15.8 miles
- First visit
- Free, no obligation
About a two-storey wraparound extension
A two-storey wraparound extension is an L-shaped addition that extends both the side and the rear of your house, on two floors. It gives one of the largest gains in floor space of any extension, typically a big open-plan kitchen and living area below and two or more bedrooms or bathrooms above. In England it needs planning permission, because the side part is more than one storey.
We cover postcode district WA12 in and around Newton-le-Willows, along with neighbouring Golborne, Ashton-in-Makerfield and Haydock.
What it costs in Newton-le-Willows
Most of the cost of a two-storey wraparound extension is set by its size and specification. For Newton-le-Willows and the rest of North West England, our guide is £2,040–£2,800 per m² including VAT, so about £114,500–£157,000 for an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space). These are guides, not quotes. Ground conditions, steelwork and access can move the figure either way.
| Spec | Per m² | An L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space) |
|---|---|---|
| Essential | £1,880–£2,580 per m² | £105,000–£144,500 |
| Standard | £2,040–£2,800 per m² | £114,500–£157,000 |
| Premium | £2,450–£3,360 per m² | £137,500–£188,500 |
Planning and building regulations in Newton-le-Willows
In England, a two-storey wraparound extension needs householder planning permission, because any extension beyond a side wall must be single storey to be permitted development. The application costs £548 (or £575 for applications made from 8 December 2026). Councils weigh the side part against the street scene and the rear part against neighbours' light and outlook, and should decide within 8 weeks of validation.
Approval in England: Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
Building regulations: Building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end.
Design points for Newton-le-Willows homes
Two roofs that meet
A wraparound needs the side roof and rear roof to join cleanly, often with a valley or hip where they meet. Getting pitches and ridge heights right keeps rainwater moving and avoids a bulky mass at the back corner, which neighbours and planners notice.
The corner post
At the outside corner of the L, there is no existing wall to carry the floor above. Opening the ground floor fully usually means a steel frame or a corner post, and the engineer's design sets how slim it can be. We decide early whether you want a clear corner or a visible post.
How we'd run your project
Free site visit
We visit your home in Newton-le-Willows, look at the structure, access and boundaries, and talk through what you want the new rooms to do.
Plans, then approval
Measured survey, design, then the right approval route for your house. We explain each step before we take it.
Price it properly
Once the engineer's calculations are in, we fix the build price in writing, with a clear list of what's included.
Build and hand over
We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.
Questions about two-storey wraparound extensions in Newton-le-Willows
Do I need planning permission for a two-storey wraparound extension in Newton-le-Willows?
Newton-le-Willows is in England, so England planning rules apply. Planning permission is needed: the side part takes it outside permitted development in England. If in doubt, a lawful development certificate or a planning application gives you certainty before you build.
How much does a two-storey wraparound extension cost in Newton-le-Willows?
Our guide for North West England, which covers Newton-le-Willows, is £2,040–£2,800 per m² including VAT. A typical project with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space) comes to about £114,500–£157,000. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
How long does a two-storey wraparound extension take?
Allow 4 to 8 weeks for survey and design, then the approval period (councils should decide householder applications within 8 weeks of validation), then 4 to 8 weeks of technical design, which can overlap. The build itself usually takes 14 to 20 weeks, longer for large or complex designs.
Can I stay at home during a wraparound extension?
Many people do, but a wraparound affects two sides of the house and usually the kitchen, so there will be weeks without a full kitchen. We plan a temporary kitchen, keep a route through the house and seal off the work area. For some families, moving out while the rear wall is opened up is easier.
How much floor space does a wraparound extension add?
It depends on the width of the side plot and the depth at the rear. Our guide prices are based on a typical wraparound with an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space). Yours may be larger or smaller, and the measured survey shows what your plot can take.
Nearby
We also cover places near Newton-le-Willows, including:
Other extensions in Newton-le-Willows
- Rear
- Side
- Part two-storey
- Over a garage
- First floor
- Semi-detached
- Detached
- Kitchen and bedrooms
- Bedroom and en-suite
All two-storey extension services in Newton-le-Willows · Two-storey wraparound extensions across Merseyside
Book a free site visit in Newton-le-Willows and we'll tell you what's possible, what approvals you need and what the design stage would cost.