Building services in Swansea
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Swansea
| Project | Guide range (inc VAT) |
|---|---|
| Double-storey extensions | £1,500–£2,300 per m² of floor area (both floors) |
| Kitchen extensions | £2,050–£3,150 per m² including a mid-range kitchen |
| Dormer loft conversions | £44,000–£62,500 for a typical rear dormer with en-suite |
| Hip-to-gable loft conversions | £50,500–£72,000 for a hip-to-gable with rear dormer |
| House renovations | £850–£1,650 per m² for a medium to full renovation |
| Porches | £6,000–£14,500 from a 3 m² porch to a small front extension |
That range is adjusted for Wales, where domestic building work typically costs around 8% below the national average.
Planning permission in Swansea
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.
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.
About building in Swansea
Terraced houses in Welsh towns often have narrow plots, which suits rear and side return extensions and rear dormers.
If your home is in Swansea or close by in Clydach, Gorseinon and Neath, a free home visit is the first step. Swansea has a population of around 300,000.
How it works
- 01
Free visit
We look at the property, talk through what you want and measure up. There is no charge and no obligation.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions from homeowners in Swansea
How much does an extension cost in Swansea?
A single-storey extension in Swansea typically costs £1,800–£2,650 per m² of floor area, and a double-storey extension £1,500–£2,300 per m² of floor area (both floors), including VAT.
Do I need planning permission for an extension in Swansea?
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.
Do you work in Swansea?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Swansea, including postcodes SA1.
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
How much does a loft conversion cost in Swansea?
A rear dormer loft conversion in Swansea typically costs £44,000–£62,500 for a typical rear dormer with en-suite, including VAT.