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 Sutton?
In Sutton, a garage conversion typically costs £23,500–£39,000 for a single integral garage, including VAT at 20% (standard rate). Prices across London are typically 30% above the UK average for this kind of work, which is reflected in the range for Sutton. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A single integral garage | £23,500–£39,000 |
| Higher specification | £39,000–£49,000 |
The main things that change the cost:
- Single or double garage
- Integral, attached or detached
- Bathroom or kitchen
- Foundations under the old door opening
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 Sutton?
The approval route for Sutton 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.
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:
- Wall and ceiling insulation
- Floor raised with insulation and damp-proof membrane
- New wall and window to replace the garage door
- Building control completion
- Planning check for removed permitted development rights
- Electrics, heating and plastering
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 Sutton
Many London boroughs have conservation areas and detailed design guides, so early design advice saves time at the planning stage.
We work across Sutton and neighbouring areas such as Carshalton, Wallington and Morden. Postcodes we cover in Sutton include CR44, SM1 and SM2.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Permissions sorted
Applications, building control and neighbour arrangements, all before the start date.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions about garage conversions in Sutton
How much does a garage conversion cost in Sutton?
In Sutton, a garage conversion typically costs £23,500–£39,000 for a single integral garage, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.
Do you build garage conversions in Sutton?
Yes. We build garage conversions across Sutton, including postcodes CR44, SM1 and SM2. Every project starts with a free home visit.
Will losing the garage affect parking?
Councils sometimes object if on-street parking is under pressure. We check local parking standards.
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.
How long does it take?
Typically 3 to 6 weeks on site.