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 Wimbledon?
In Wimbledon, a garage conversion typically costs £23,500–£39,000 for a single integral garage, including VAT at 20% (standard rate). That range is adjusted for London, where domestic building work typically costs around 30% above the national average. 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:
- Integral, attached or detached
- Single or double garage
- Whether planning permission is needed
- Heating and flooring
Use the guide price tool to see how size and specification change the figure, then ask for a written, itemised quote.
Do you need planning permission for a garage conversion in Wimbledon?
Before anything is built in Wimbledon, we confirm which approvals apply 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.
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:
- Floor raised with insulation and damp-proof membrane
- Foundation check under the garage door opening
- Wall and ceiling insulation
- Electrics, heating and plastering
- New wall and window to replace the garage door
- Planning check for removed permitted development rights
How long does it take?
Build time is typically 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 Wimbledon
Space is at a premium in London, so homeowners often build out into the side return or up into the roof rather than move.
If your home is in Wimbledon or close by in Morden, Tooting and Mitcham, a free home visit is the first step.
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 pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals in place
We handle planning, building control and neighbour notices before work starts.
- 04
Construction and completion
We build, put right any snags and hand over the building control certificate.
Questions about garage conversions in Wimbledon
Who approves a garage conversion in Wimbledon?
Planning matters in Wimbledon go to the council covering your address, and the work needs building control approval. We prepare and submit the applications for you.
Can the floor be level with the house?
Yes. The garage floor is raised and insulated to match the house floor level.
How long does it take?
Typically 3 to 6 weeks on site.
How much does a garage conversion cost in Wimbledon?
In Wimbledon, 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.
Can a detached garage be converted?
Yes, but using it as separate living accommodation may need planning permission.