Two-storey wraparound extensions in Nelson (Mid Glamorgan)

Before you start in Nelson (Mid Glamorgan), here's what applies.

Postcode districts: CF46
County / area: Mid Glamorgan, Wales
Price region: Wales
Guide price: £111,000–£152,000 (£1,980–£2,710 per m²)
Approval route: Usually needs planning permission, because the combined side and rear works rarely meet every permitted development test.
Nearest towns: Treharris (1.2 miles), Gelligaer (1.4 miles), Abercynon (1.9 miles)
Distance to Rhondda: about 7.1 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.

We cover postcode district CF46 in and around Nelson (Mid Glamorgan), along with neighbouring Treharris, Gelligaer and Abercynon.

What it costs in Nelson (Mid Glamorgan)

Guide prices for two-storey wraparound extensions in Wales are around £1,980–£2,710 per m² of new floor space, including VAT. For 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), that's roughly £111,000–£152,000. 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	£1,820–£2,500 per m²	£102,000–£140,000
Standard	£1,980–£2,710 per m²	£111,000–£152,000
Premium	£2,370–£3,260 per m²	£133,000–£182,500

Planning and building regulations in Nelson (Mid Glamorgan)

In Wales, a wraparound would have to pass both the side and rear tests to be permitted development: 10.5 m to the opposite side boundary, a 1 m set-back from the front and no more than 50% added width, plus the 4 m and 3 m rear depth limits and 10.5 m to the rear boundary. Many wraparounds therefore need a householder application, which costs £585.

Approval in Wales: Householder planning application: £585. Councils normally decide householder applications within 8 weeks.

Building regulations: Building regulations approval under the Welsh Approved Documents, which differ from England's in places (notably energy efficiency).

Design points for Nelson (Mid Glamorgan) 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 Nelson (Mid Glamorgan), look at the structure, access and boundaries, and talk through what you want the new rooms to do.
Get it approved
Once you're happy with the design we submit it to the council for Nelson (Mid Glamorgan) and deal with any questions from the planning officer.
Structure and building control
A structural engineer sizes the foundations and steels, and we get building regulations approval before work starts.
Build
Foundations, walls, floor, roof, windows, then first and second fix. We break through into the house as late as we can.

Questions about two-storey wraparound extensions in Nelson (Mid Glamorgan)

Do I need planning permission for a two-storey wraparound extension in Nelson (Mid Glamorgan)?

Nelson (Mid Glamorgan) is in Wales, so Wales planning rules apply. Usually needs planning permission, because the combined side and rear works rarely meet every permitted development test. If in doubt, a lawful development certificate or a planning application gives you certainty before you build.

Which postcodes do you cover around Nelson (Mid Glamorgan)?

We cover Nelson (Mid Glamorgan) (CF46) and nearby places including Treharris, Gelligaer and Abercynon, plus the rest of Mid Glamorgan. The first site visit is free.

How much does a two-storey wraparound extension cost in Nelson (Mid Glamorgan)?

Our guide for Wales, which covers Nelson (Mid Glamorgan), is £1,980–£2,710 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 £111,000–£152,000. Design and approval fees are extra, and we fix the build price in writing once the design is agreed.

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.

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

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Other extensions in Nelson (Mid Glamorgan)

All two-storey extension services in Nelson (Mid Glamorgan) · Two-storey wraparound extensions across Mid Glamorgan

Ready to talk it through? Call us or send the form and we'll arrange a visit to your home in Nelson (Mid Glamorgan).