In short: An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. We carry this out across Rhondda Cynon Taf, priced against the HMO rules for Wales and the council’s own standards.
- Nation
- Wales
- Pricing region
- Wales
- Postcode areas
- CF
- Main towns
- Rhondda, Tonypandy, Pontypridd, Aberdare, Llantrisant
What do extensions for extra rooms in Rhondda Cynon Taf involve?
- Building control completion
- Kitchen or bedroom fit-out
- Foundations, structure and roof
- Party wall coordination where needed
- Fire separation and detection extended to the new space
- Ensuite drainage and extraction
Which rules apply in Rhondda Cynon Taf?
- 3–6 sharers is use class C4, and in Wales changing a house to C4 always needs planning permission; only C4 back to C3 is permitted development.
- Building regulations cover structural work, partitions, drainage, fire-resisting construction and electrics; confirm with building control whether the conversion is a material change of use.
- Council HMO standards and the fire risk assessment set detection, fire doors and escape routes.
- Kitchen and bathroom ratios are set in each council’s HMO standards.
- More than 6 sharers is a sui generis HMO and needs planning permission; councils such as Cardiff apply concentration limits.
Welsh councils set their own HMO standards and may run additional licensing. In Wales, changing a house to a C4 HMO always needs planning permission, so check planning first.
How much do extensions for extra rooms cost in Rhondda Cynon Taf?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £32,900 – £56,400 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,700 – £3,750 | m² |
Typical time on site: 8–14 weeks. For a figure for your house, try the guide-price tool.
Extensions for extra rooms by town in Rhondda Cynon Taf
Questions about extensions for extra rooms in Rhondda Cynon Taf
Is a kitchen extension worth it?
Often, when the existing kitchen limits how many people the council will allow. A bigger kitchen can unlock an extra room.
Do you handle building control?
Yes, from application to completion certificate.
Do you carry out extensions for extra rooms across Rhondda Cynon Taf?
Yes, across the whole of Rhondda Cynon Taf, including Rhondda, Tonypandy, Pontypridd.
Who licenses HMOs in Rhondda Cynon Taf?
Rhondda Cynon Taf council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.
Other HMO services in Rhondda Cynon Taf
- Loft conversions for extra rooms in Rhondda Cynon Taf
- Communal kitchen refits in Rhondda Cynon Taf
- Layout changes and room reconfiguration in Rhondda Cynon Taf
- Large HMO conversions (7+ sharers) in Rhondda Cynon Taf
- Ensuite installation in Rhondda Cynon Taf
- House to HMO conversion in Rhondda Cynon Taf
- Bedroom upgrades and room refits in Rhondda Cynon Taf
- Shared bathroom and shower room refits in Rhondda Cynon Taf