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 Birmingham?
In Birmingham, a garage conversion typically costs £17,500–£29,000 for a single integral garage, including VAT at 20% (standard rate). Prices in the West Midlands sit near the national average for this kind of work, and the range for Birmingham reflects that. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A single integral garage | £17,500–£29,000 |
| Higher specification | £29,000–£36,000 |
The biggest cost drivers are:
- Whether planning permission is needed
- Single or double garage
- Foundations under the old door opening
- Heating and flooring
Your exact price depends on the survey and drawings. The guide price tool gives a quick range in the meantime.
Do you need planning permission for a garage conversion in Birmingham?
Approvals for a garage conversion in Birmingham 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.
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
The work we manage on a garage conversion:
- Foundation check under the garage door opening
- Drawings and building control application
- Electrics, heating and plastering
- Floor raised with insulation and damp-proof membrane
- Planning check for removed permitted development rights
- New wall and window to replace the garage door
How long does it take?
Expect 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 Birmingham
The West Midlands has large numbers of 1930s semis and Victorian terraces, which suit rear extensions, side extensions and dormer loft conversions.
Projects in Birmingham (B1, B2, B3 and B4) are surveyed in person before we quote, so the price reflects your actual property.
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
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions about garage conversions in Birmingham
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.
How long does it take?
Typically 3 to 6 weeks on site.
Can the floor be level with the house?
Yes. The garage floor is raised and insulated to match the house floor level.
Who approves a garage conversion in Birmingham?
Planning matters in Birmingham go to the council covering your address, and the work needs building control approval. We prepare and submit the applications for you.
How much does a garage conversion cost in Birmingham?
In Birmingham, a garage conversion typically costs £17,500–£29,000 for a single integral garage, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.