Building services in Trowbridge
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 Trowbridge
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £2,000–£2,950 per m² of floor area |
| Dormer loft conversions | £49,000–£69,500 for a typical rear dormer with en-suite |
| Hip-to-gable loft conversions | £56,000–£79,500 for a hip-to-gable with rear dormer |
| Garage conversions | £18,500–£30,500 for a single integral garage |
| House renovations | £900–£1,850 per m² for a medium to full renovation |
| 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 Trowbridge reflects that.
Planning permission in Trowbridge
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 Trowbridge
In parts of the South West, protected landscapes and conservation areas shape what can be built, so materials and roof forms are chosen carefully.
Our Trowbridge coverage includes postcode districts BA14, and we also work in nearby places such as Melksham, Bath and Frome. Trowbridge has a population of around 41,000.
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
Permissions sorted
Applications, building control and neighbour arrangements, all before the start date.
- 04
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions from homeowners in Trowbridge
How much does a loft conversion cost in Trowbridge?
A rear dormer loft conversion in Trowbridge typically costs £49,000–£69,500 for a typical rear dormer with en-suite, including VAT.
How much does an extension cost in Trowbridge?
A single-storey extension in Trowbridge 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.
Do you work in Trowbridge?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Trowbridge, including postcodes BA14.
Do I need planning permission for an extension in Trowbridge?
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.
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.