In short: An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Powys we survey first, price each item separately and hand over the certificates and photos a council asks for.
- Nation
- Wales
- Pricing region
- Wales
- Postcode areas
- LD, SY, NP, SA
What do extensions for extra rooms in Powys involve?
- Kitchen or bedroom fit-out
- Heating, insulation and glazing
- Foundations, structure and roof
- Fire separation and detection extended to the new space
- Ensuite drainage and extraction
- Party wall coordination where needed
Which rules apply in Powys?
- 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 Powys?
| 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.
Questions about extensions for extra rooms in Powys
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
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 carry out extensions for extra rooms across Powys?
Yes, across the whole of Powys.
Who licenses HMOs in Powys?
Powys council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.
Other HMO services in Powys
- Loft conversions for extra rooms in Powys
- Communal kitchen refits in Powys
- Layout changes and room reconfiguration in Powys
- Large HMO conversions (7+ sharers) in Powys
- Ensuite installation in Powys
- House to HMO conversion in Powys
- Bedroom upgrades and room refits in Powys
- Escape routes, emergency lighting and fire stopping in Powys