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 Willesden?
In Willesden, a garage conversion typically costs £23,500–£39,000 for a single integral garage, including VAT at 20% (standard rate). The guide for Willesden reflects typical costs in London, roughly 30% above the UK-wide figure. 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:
- Foundations under the old door opening
- Integral, attached or detached
- Bathroom or kitchen
- Single or double garage
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 Willesden?
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.
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:
- Floor raised with insulation and damp-proof membrane
- Wall and ceiling insulation
- New wall and window to replace the garage door
- Electrics, heating and plastering
- Planning check for removed permitted development rights
- Building control completion
How long does it take?
The build itself usually takes 3 to 6 weeks on site. Allow time beforehand for drawings and approvals, usually 6 to 12 weeks.
Building in Willesden
Space is at a premium in London, so homeowners often build out into the side return or up into the roof rather than move.
From NW10 outwards, we take on projects throughout Willesden and the surrounding parts of Greater London.
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 in place
We handle planning, building control and neighbour notices before work starts.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions about garage conversions in Willesden
How long does it take?
Typically 3 to 6 weeks on site.
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.
Can a detached garage be converted?
Yes, but using it as separate living accommodation may need planning permission.
How much does a garage conversion cost in Willesden?
In Willesden, 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.
Who approves a garage conversion in Willesden?
Planning matters in Willesden go to the council covering your address, and the work needs building control approval. We prepare and submit the applications for you.