In short: An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. We carry this out across Powys, priced against the HMO rules for Wales and the council’s own standards.
- Nation
- Wales
- Pricing region
- Wales
- Postcode areas
- LD, SY, NP, SA
What do loft conversions for extra rooms in Powys involve?
- Fire doors and extended alarm system
- Dormer or roof windows
- New stair within the protected route
- Ensuite where space allows
- Feasibility and head-height check
- Planning or permitted development check
Which rules apply in Powys?
- More than 6 sharers is a sui generis HMO and needs planning permission; councils such as Cardiff apply concentration limits.
- 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.
- England’s national room sizes do not apply in Wales; councils set their own room standards.
- Mandatory licence for HMOs with 3 or more storeys and 5 or more people in 2 or more households; Wales did not adopt England’s 2018 change.
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 loft conversions for extra rooms cost in Powys?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Dormer loft conversion, about 30 m² | £40,000 – £60,000 | £37,600 – £56,400 | project |
| Rooflight loft conversion, about 30 m² | £22,500 – £30,000 | £21,150 – £28,200 | project |
Typical time on site: 6–10 weeks. For a figure for your house, try the guide-price tool.
Questions about loft conversions for extra rooms in Powys
How much head height do I need?
As a rule of thumb, about 2.2 metres at the highest point of the existing roof space before any work. Less can work with a dormer or lowered ceilings.
Does a loft room need a fire escape window?
In an HMO the main protection is usually a protected stair and fire doors. The building regulations and fire strategy decide the detail.
Do you carry out loft conversions 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
- Extensions for extra rooms in Powys
- Large HMO conversions (7+ sharers) in Powys
- Escape routes, emergency lighting and fire stopping in Powys
- Ensuite installation in Powys
- Layout changes and room reconfiguration in Powys
- Fire alarm and detection systems in Powys
- Bedroom upgrades and room refits in Powys
- EPC and energy upgrades in Powys