Two-storey wraparound extensions in Newton Aycliffe

Before you start in Newton Aycliffe, here's what applies.

Postcode districts: DL5
County / area: County Durham, England
Price region: North East England
Guide price: £108,500–£148,500 (£1,940–£2,660 per m²)
Approval route: Planning permission is needed: the side part takes it outside permitted development in England.
Nearest towns: Shildon (3 miles), Ferryhill (4.6 miles), Bishop Auckland (4.9 miles)
Distance to Darlington: about 6.6 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 DL5 in and around Newton Aycliffe, along with neighbouring Shildon, Ferryhill and Bishop Auckland.

What it costs in Newton Aycliffe

In North East England, which includes Newton Aycliffe, we'd expect a two-storey wraparound extension to cost around £108,500–£148,500 for an L-shaped footprint of about 28 m² wrapping the side and rear, on two floors (56 m² of new floor space), or £1,940–£2,660 per m² including VAT. 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	£1,780–£2,440 per m²	£99,500–£137,000
Standard	£1,940–£2,660 per m²	£108,500–£148,500
Premium	£2,320–£3,190 per m²	£130,000–£178,500

Planning and building regulations in Newton Aycliffe

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 Aycliffe homes

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.

Phasing the build

A wraparound touches two sides of the house at once, so the kitchen and often the rear rooms are out of use for part of the build. We plan the sequence so you keep a working kitchen and bathroom for as long as possible, or advise when moving out briefly makes sense.

How we'd run your project

Measure and listen
A visit to Newton Aycliffe to understand how you live in the house now and what the extra rooms need to do, plus a first look at the structure.
Design and approvals
We draw the extension and check it against the rules for England, then apply for planning permission or a certificate of lawfulness, whichever fits.
Engineer it
Foundations sized for two floors, steels for any openings, and building control approval, all before anyone starts on site.
Finish and certify
Second fix, plastering and making good, then building control's final inspection and the completion paperwork.

Questions about two-storey wraparound extensions in Newton Aycliffe

Which postcodes do you cover around Newton Aycliffe?

We cover Newton Aycliffe (DL5) and nearby places including Shildon, Ferryhill and Bishop Auckland, plus the rest of County Durham. The first site visit is free.

Who handles building regulations for a project in Newton Aycliffe?

We handle it as part of the project. What's needed in England: building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end. We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.

Do I need planning permission for a two-storey wraparound extension in Newton Aycliffe?

Newton Aycliffe 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.

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.

Does a wraparound extension need steel?

Almost always. Opening the corner of the house and the old rear wall to make one open-plan space means steel beams, and often a steel post or frame at the outside corner. The structural engineer sizes these, and the steel is ordered once the design is fixed, which is one reason a wraparound needs careful sequencing.

Nearby

Close to Newton Aycliffe? We work across the area, including:

Other extensions in Newton Aycliffe

All two-storey extension services in Newton Aycliffe · Two-storey wraparound extensions across County Durham

Send us your postcode and a few details. We'll get back to you to arrange a visit and talk through your options.