In short: An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. In Conwy 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
- LL
- Main towns
- Colwyn Bay, Llandudno
What do loft conversions for extra rooms in Conwy involve?
- New stair within the protected route
- Building control sign-off
- Dormer or roof windows
- Structural design and steelwork
- Ensuite where space allows
- Feasibility and head-height check
Which rules apply in Conwy?
- 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 Conwy?
| 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.
Loft conversions for extra rooms by town in Conwy
Questions about loft conversions for extra rooms in Conwy
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.
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.
Do you carry out loft conversions for extra rooms across Conwy?
Yes, across the whole of Conwy, including Colwyn Bay, Llandudno.
Who licenses HMOs in Conwy?
Conwy council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.
Other HMO services in Conwy
- Extensions for extra rooms in Conwy
- Large HMO conversions (7+ sharers) in Conwy
- Escape routes, emergency lighting and fire stopping in Conwy
- Ensuite installation in Conwy
- Layout changes and room reconfiguration in Conwy
- Fire alarm and detection systems in Conwy
- HMO fire safety upgrades in Conwy
- House to HMO conversion in Conwy