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 Cheltenham?
In Cheltenham, 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 Cheltenham 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 |
Your quote will depend mainly on:
- Heating and flooring
- Bathroom or kitchen
- Foundations under the old door opening
- Integral, attached or detached
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 Cheltenham?
Approvals for a garage conversion in Cheltenham follow the rules for 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
The work we manage on a garage conversion:
- Foundation check under the garage door opening
- Drawings and building control application
- Floor raised with insulation and damp-proof membrane
- Electrics, heating and plastering
- Wall and ceiling insulation
- New wall and window to replace the garage door
How long does it take?
Build time is typically 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 Cheltenham
The South West mixes stone and render cottages with post-war and newer estates, and local materials matter more here when matching an extension.
Cheltenham sits in Gloucestershire, about 7 miles east of Gloucester. We cover the whole of Cheltenham, including postcodes GL50 and GL52.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions about garage conversions in Cheltenham
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 Cheltenham?
In Cheltenham, 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.
Who approves a garage conversion in Cheltenham?
Planning matters in Cheltenham go to the council covering your address, and the work needs building control approval. We prepare and submit the applications for you.
Can a detached garage be converted?
Yes, but using it as separate living accommodation may need planning permission.