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 Caerphilly?
In Caerphilly, a garage conversion typically costs £16,500–£27,500 for a single integral garage, including VAT at 20% (standard rate). The guide for Caerphilly reflects typical costs in Wales, roughly 8% below the UK-wide figure. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| A single integral garage | £16,500–£27,500 |
| Higher specification | £27,500–£34,500 |
The main things that change the cost:
- Bathroom or kitchen
- Foundations under the old door opening
- Heating and flooring
- Whether planning permission is needed
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 Caerphilly?
Here is how the rules work for a garage conversion in Wales. In Wales converting a garage usually does not need planning permission unless rights have been removed by a planning condition; building regulations approval is always needed.
The Party Wall etc. Act 1996 applies in Wales, so notices must be served before work on a shared wall, on the boundary, or excavation close to a neighbour’s foundations.
At the survey we check your house’s planning history and any restrictions, and tell you which route applies.
What we handle
On a typical garage conversion we handle:
- Planning check for removed permitted development rights
- Drawings and building control application
- Wall and ceiling insulation
- Foundation check under the garage door opening
- Building control completion
- Floor raised with insulation and damp-proof membrane
How long does it take?
Expect 3 to 6 weeks on site. Allow time beforehand for drawings and approvals, usually 6 to 12 weeks.
Building in Caerphilly
Terraced houses in Welsh towns often have narrow plots, which suits rear and side return extensions and rear dormers.
We work across Caerphilly and neighbouring areas such as Risca, Pontypridd and Blackwood. Postcodes we cover in Caerphilly include CF83.
How it works
- 01
Free visit
We look at the property, talk through what you want and measure up. There is no charge and no obligation.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions about garage conversions in Caerphilly
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 Caerphilly?
In Caerphilly, a garage conversion typically costs £16,500–£27,500 for a single integral garage, including VAT at 20% (standard rate). Your fixed price depends on the survey and drawings.
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.
Do you build garage conversions in Caerphilly?
Yes. We build garage conversions across Caerphilly, including postcodes CF83. Every project starts with a free home visit.
Can the floor be level with the house?
Yes. The garage floor is raised and insulated to match the house floor level.
Do I need planning permission for a garage conversion in Caerphilly?
In Wales converting a garage usually does not need planning permission unless rights have been removed by a planning condition; building regulations approval is always needed.