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 Chepstow?
In Chepstow, a garage conversion typically costs £16,500–£27,500 for a single integral garage, including VAT at 20% (standard rate). Prices across Wales are typically 8% below the UK average for this kind of work, which is reflected in the range for Chepstow. 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 |
What moves the price most:
- Integral, attached or detached
- Foundations under the old door opening
- Bathroom or kitchen
- Single or double garage
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 Chepstow?
Whether you need planning permission depends on your house and its location 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.
Building regulations in Wales are set by the Welsh Government. Approval comes from the council’s building control service or a registered building control approver, with inspections during the work and a completion certificate at the end.
If the answer is not clear-cut, we can apply for formal confirmation before you commit to the build.
What we handle
Handled as part of most garage conversions:
- Foundation check under the garage door opening
- New wall and window to replace the garage door
- Wall and ceiling insulation
- Electrics, heating and plastering
- Floor raised with insulation and damp-proof membrane
- Drawings and building control application
How long does it take?
Build time is typically 3 to 6 weeks on site. Allow time beforehand for drawings and approvals, usually 6 to 12 weeks.
Building in Chepstow
Wales has many terraced valley streets, stone cottages and post-war estates, so extension designs are shaped by slopes, materials and local character.
Projects in Chepstow (NP16) 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
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
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions about garage conversions in Chepstow
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 building regulations approval?
Yes. Converting a garage to a habitable room needs building control approval for insulation, ventilation, fire safety and the new wall.
Who approves a garage conversion in Chepstow?
Planning matters in Chepstow 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 Chepstow?
In Chepstow, 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.
Can a detached garage be converted?
Yes, but using it as separate living accommodation may need planning permission.
Do I need planning permission for a garage conversion in Chepstow?
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.