Two-storey wraparound extensions in Whitchurch (Cardiff and the Vale of Glamorgan)

Whitchurch (Cardiff and the Vale of Glamorgan): the key facts for this kind of project.

Postcode districts: CF14
County / area: Cardiff and the Vale of 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: Rhiwbina (1.2 miles), Llandaff (1.3 miles), Thornhill (2.4 miles)
Distance to Cardiff: about 2.8 miles
First visit: Free, no obligation

About a two-storey wraparound extension

A two-storey wraparound extension suits a house with space both beside it and behind it, where you want to transform the layout rather than add a single room. You get one design for the whole L-shape, the planning application, structural design for the corner and the openings into the house, building regulations approval and the build, managed by us and carried out by vetted teams working under S&K.

We cover Whitchurch (Cardiff and the Vale of Glamorgan) (CF14) and the places around it, including Rhiwbina (1.2 miles), Llandaff (1.3 miles) and Thornhill.

What it costs in Whitchurch (Cardiff and the Vale of Glamorgan)

Using our Wales rates, a two-storey wraparound extension 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, including VAT. Bigger or more glazed designs cost more per m². Keep a contingency of around 10% for things nobody can see until the ground is opened up.

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 Whitchurch (Cardiff and the Vale of 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 Whitchurch (Cardiff and the Vale of Glamorgan) homes

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.

Daylight to the middle

A deep L-shaped plan can leave the middle of the ground floor dark, because the old rear rooms are now enclosed. We use wide rear openings, a well-placed stair and, where part of the extension is single storey, roof lights, while keeping total glazing within the Part L allowance.

How we'd run your project

Visit and first ideas
One of our team visits your house in Whitchurch (Cardiff and the Vale of Glamorgan), checks the walls, roof and drains, and sketches out options with you.
Plans, then approval
Measured survey, design, then the right approval route for your house. We explain each step before we take it.
Engineer it
Foundations sized for two floors, steels for any openings, and building control approval, all before anyone starts on site.
Build it
The new structure goes up first, then we open into the house, finish inside and get the completion certificate.

Questions about two-storey wraparound extensions in Whitchurch (Cardiff and the Vale of Glamorgan)

Which postcodes do you cover around Whitchurch (Cardiff and the Vale of Glamorgan)?

We cover Whitchurch (Cardiff and the Vale of Glamorgan) (CF14) and nearby places including Rhiwbina, Llandaff and Thornhill, plus the rest of Cardiff and the Vale of Glamorgan. The first site visit is free.

Who handles building regulations for a project in Whitchurch (Cardiff and the Vale of Glamorgan)?

We handle it as part of the project. What's needed in Wales: building regulations approval under the Welsh Approved Documents, which differ from England's in places (notably energy efficiency). We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.

How much does a two-storey wraparound extension cost in Whitchurch (Cardiff and the Vale of Glamorgan)?

Our guide for Wales, which covers Whitchurch (Cardiff and the Vale of 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.

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.

Can a wraparound extension be part single, part two-storey?

Yes. Many wraparounds keep the rear part single storey with roof lights over the kitchen and put the two-storey part to the side. This can reduce the effect on neighbours and the cost. We set out both options at the design stage, so you can compare floor space against price before choosing.

Nearby

The same service in neighbouring towns:

Other extensions in Whitchurch (Cardiff and the Vale of Glamorgan)

All two-storey extension services in Whitchurch (Cardiff and the Vale of Glamorgan) · Two-storey wraparound extensions across Cardiff and the Vale of Glamorgan

Tell us about your house in Whitchurch (Cardiff and the Vale of Glamorgan) and we'll call you back to arrange a free, no-obligation visit.