What is a garage conversion?
A garage conversion turns an integral or attached garage into habitable space, such as a study, playroom, bedroom or utility. The garage door is replaced with a wall and window, the floor is raised and insulated, and the walls and roof are brought up to building regulations.
How much does a garage conversion cost in Wiltshire?
In Wiltshire, a garage conversion typically costs £18,500–£30,500 for a single integral garage, including VAT at 20% (standard rate). Prices in the South West sit near the national average for this kind of work, and the range for Wiltshire reflects that. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A single integral garage | £18,500–£30,500 |
| Higher specification | £30,500–£38,000 |
What moves the price most:
- Heating and flooring
- Single or double garage
- Integral, attached or detached
- Whether planning permission is needed
For a figure based on your own measurements, try the guide price tool, then book a free home visit for a fixed quote.
Do you need planning permission for a garage conversion in Wiltshire?
The approval route for Wiltshire is set by planning law in England. In England converting an integral or attached garage usually does not need planning permission, unless a condition on the house removed permitted development rights (common on estates built in recent decades) or the house is listed. Building regulations approval is always needed.
Where work involves a shared wall, building on the boundary, or digging foundations within 3 metres of a neighbour’s building and deeper than its foundations (or within 6 metres for deeper work), the Party Wall etc. Act 1996 applies and notices must be served before work starts.
Our first visit includes a check of your planning history, so you know the route before paying for drawings.
What we handle
Handled as part of most garage conversions:
- Planning check for removed permitted development rights
- New wall and window to replace the garage door
- Wall and ceiling insulation
- Electrics, heating and plastering
- Floor raised with insulation and damp-proof membrane
- Drawings and building control application
How long does it take?
The build itself usually takes 3 to 6 weeks on site. Before that, surveys, drawings and approvals usually take 6 to 12 weeks, longer if the council asks for changes.
Building in Wiltshire
The South West mixes stone and render cottages with post-war and newer estates, and local materials matter more here when matching an extension.
Towns we cover in Wiltshire include Swindon, Salisbury, Trowbridge, Chippenham and Melksham.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 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 about garage conversions in Wiltshire
Will losing the garage affect parking?
Councils sometimes object if on-street parking is under pressure. We check local parking standards.
Do you build garage conversions in Wiltshire?
Yes. We build garage conversions across Wiltshire, including postcodes BA12, BA13, BA14, BA15 and RG17. Every project starts with a free home visit.
Do I need planning permission for a garage conversion?
Usually not if the work is internal and the house keeps its permitted development rights. Many newer houses have planning conditions that remove those rights, in which case an application is needed.
Can the floor be level with the house?
Yes. The garage floor is raised and insulated to match the house floor level.
How much does a garage conversion cost in Wiltshire?
In Wiltshire, a garage conversion typically costs £18,500–£30,500 for a single integral garage, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.