Building services in St Austell
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 St Austell
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £2,000–£2,950 per m² of floor area |
| Double-storey extensions | £1,700–£2,550 per m² of floor area (both floors) |
| Garage conversions | £18,500–£30,500 for a single integral garage |
| House renovations | £900–£1,850 per m² for a medium to full renovation |
| Structural alterations and knock-throughs | £4,500–£9,750 for a typical knock-through with steel beam |
| Porches | £6,750–£16,500 from a 3 m² porch to a small front extension |
Prices in the South West sit near the national average for this kind of work, and the range for St Austell reflects that.
Planning permission in St Austell
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
About building in St Austell
In parts of the South West, protected landscapes and conservation areas shape what can be built, so materials and roof forms are chosen carefully.
Projects in St Austell (PL25) are surveyed in person before we quote, so the price reflects your actual property. St Austell has a population of around 24,000.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Design and fixed quote
Drawings, structural calculations and an itemised, fixed price for the agreed specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions from homeowners in St Austell
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
Do I need planning permission for an extension in St Austell?
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
Do you work in St Austell?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across St Austell, including postcodes PL25.
How much does an extension cost in St Austell?
A single-storey extension in St Austell typically costs £2,000–£2,950 per m² of floor area, and a double-storey extension £1,700–£2,550 per m² of floor area (both floors), including VAT.
How much does a loft conversion cost in St Austell?
A rear dormer loft conversion in St Austell typically costs £49,000–£69,500 for a typical rear dormer with en-suite, including VAT.