Building projects we take on in South Glamorgan
House extensions
- Single-storey extensions in South Glamorgan
- Double-storey extensions in South Glamorgan
- Side extensions in South Glamorgan
- Side return extensions in South Glamorgan
- Wraparound extensions in South Glamorgan
- Kitchen extensions in South Glamorgan
- Orangeries in South Glamorgan
- Glazed and contemporary extensions in South Glamorgan
- Porches in South Glamorgan
Loft conversions
- Dormer loft conversions in South Glamorgan
- Hip-to-gable loft conversions in South Glamorgan
- Mansard loft conversions in South Glamorgan
- Rooflight loft conversions in South Glamorgan
- Bungalow loft conversions in South Glamorgan
Garage, basement and barn conversions
- Garage conversions in South Glamorgan
- Basement conversions in South Glamorgan
- Barn conversions in South Glamorgan
- Garden annexes in South Glamorgan
New build homes
Renovations and structural work
Design and approvals
Guide prices in South Glamorgan
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £1,800–£2,650 per m² of floor area |
| Double-storey extensions | £1,500–£2,300 per m² of floor area (both floors) |
| Dormer loft conversions | £44,000–£62,500 for a typical rear dormer with en-suite |
| Garage conversions | £16,500–£27,500 for a single integral garage |
| House renovations | £850–£1,650 per m² for a medium to full renovation |
| New build homes | £1,850–£2,950 per m² of floor area (build cost) |
Prices across Wales are typically 8% below the UK average for this kind of work, which is reflected in the range for South Glamorgan.
Planning and building control in South Glamorgan
In Wales a single-storey rear extension is often permitted development: up to 4 metres beyond the rear wall and up to 4 metres high, with eaves no higher than 3 metres within 2 metres of a boundary and no more than half the land around the original house covered. Wales has no larger home extension prior approval route, so deeper extensions need a planning application, as do extensions to flats, listed buildings and houses whose rights have been removed.
In Wales roof enlargements such as rear dormers can be permitted development within volume limits and design conditions. Dormers facing a road, balconies and conservation-area work need permission.
Building regulations in Wales are set by the Welsh Government. Approval comes from the council’s building control service or a registered building control approver, with inspections during the work and a completion certificate at the end.
Building in South Glamorgan
Wales has many terraced valley streets, stone cottages and post-war estates, so extension designs are shaped by slopes, materials and local character.
Questions about building in South Glamorgan
Do you cover all of South Glamorgan?
Yes. We take on projects across South Glamorgan, including Cardiff, Barry and Penarth.
How much does an extension cost in South Glamorgan?
A single-storey extension in South Glamorgan typically costs £1,800–£2,650 per m² of floor area, including VAT.
Do I need planning permission in South Glamorgan?
In Wales a single-storey rear extension is often permitted development: up to 4 metres beyond the rear wall and up to 4 metres high, with eaves no higher than 3 metres within 2 metres of a boundary and no more than half the land around the original house covered. Wales has no larger home extension prior approval route, so deeper extensions need a planning application, as do extensions to flats, listed buildings and houses whose rights have been removed.
Who approves building work in South Glamorgan?
Building regulations in Wales are set by the Welsh Government. Approval comes from the council’s building control service or a registered building control approver, with inspections during the work and a completion certificate at the end.