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 Bath?
In Bath, 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 Bath 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:
- Single or double garage
- Bathroom or kitchen
- Heating and flooring
- Foundations under the old door opening
A guide range is only a starting point: the guide price tool gives an instant figure for your size, and a free survey turns it into a fixed quote.
Do you need planning permission for a garage conversion in Bath?
Whether you need planning permission depends on your house and its location 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.
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.
We check this for your address before design work starts, so there are no surprises later.
What we handle
On a typical garage conversion we handle:
- Electrics, heating and plastering
- New wall and window to replace the garage door
- Wall and ceiling insulation
- Floor raised with insulation and damp-proof membrane
- Planning check for removed permitted development rights
- Building control completion
How long does it take?
Allow 3 to 6 weeks on site. Design and approvals come first and typically take 6 to 12 weeks, depending on the approval route.
Building in Bath
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 Bath coverage includes postcode districts BA1, and we also work in nearby places such as Keynsham, Trowbridge and Kingswood.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 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 Bath
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.
Do I need building regulations approval?
Yes. Converting a garage to a habitable room needs building control approval for insulation, ventilation, fire safety and the new wall.
Will losing the garage affect parking?
Councils sometimes object if on-street parking is under pressure. We check local parking standards.
How much does a garage conversion cost in Bath?
In Bath, 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.
How long does a garage conversion take in Bath?
Typically 3 to 6 weeks on site. Design and approvals beforehand usually take 6 to 12 weeks.