Covering Merthyr Tydfil
Alongside Merthyr Tydfil, we also cover Aberdare, Rhondda (7 miles to the south-west) and Ebbw Vale.
Homes in Mid Glamorgan
Welsh homes include long terraces built into hillsides, stone cottages and modern estates, and sloping sites often shape how and where an extension can go.
What is included in a garage conversion in Merthyr Tydfil?
A garage conversion turns an attached, integral or detached garage into a habitable room by infilling the door opening, insulating the floor, walls and roof, and adding windows, heating and power. It is one of the quickest and cheapest ways to add a room.
- Building control application
- Insulated floor, walls and ceiling
- Plastering, skirting and decoration-ready finish
What will a garage conversion cost?
Typical ranges for garage conversions. Ground conditions, access and specification move the final figure, which we fix in writing before work starts.
| Garage conversions | Guide price incl. VAT |
|---|---|
| Single integral garage | £12,000 to £17,000 |
| Single attached garage | £12,000 to £24,000 |
| Single detached garage | £18,000 to £30,000 |
| Double garage | £25,000 to £54,000 |
What approvals does a garage conversion need in Wales?
Planning decisions in Wales are made by the local council, using permitted development rules set by the Welsh Government rather than England’s. Building regulations in Wales have their own approved documents, and the Party Wall etc. Act 1996 applies to work on shared walls and boundaries.
In Wales, converting an attached garage usually does not need planning permission unless rights have been removed by condition or the building is listed.
What should I think about before starting?
- A bedroom needs an escape window or a protected route out.
- Losing a parking space can matter on streets with permit parking.
How does the project run?
- Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
- Free site visit. We measure up, look at access, drains and the structure, and talk through options and budget.
- Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
- We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.
Your questions answered
How much does a garage conversion cost?
A single integral garage usually costs about £12,000 to £17,000 including VAT. Detached and double garages cost more.
How long does a garage conversion take?
About 2 to 5 weeks on site.
How do I get a price for garage conversions in Merthyr Tydfil?
Use the guide price tool for a ballpark figure, then book a visit for a fixed written price for the agreed specification.
Also covering
- Garage conversions in Aberdare
- Garage conversions in Rhondda
- Garage conversions in Ebbw Vale
- Garage conversions in Tonypandy
Learn more about garage conversions, or see every project we cover in Merthyr Tydfil.

