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 Isle of Anglesey, priced against the HMO rules for Wales and the council’s own standards.
- Nation
- Wales
- Pricing region
- Wales
- Postcode areas
- LL
What do loft conversions for extra rooms in Isle of Anglesey involve?
- New stair within the protected route
- Planning or permitted development check
- Ensuite where space allows
- Dormer or roof windows
- Building control sign-off
- Fire doors and extended alarm system
Which rules apply in Isle of Anglesey?
- 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.
- Fitness for human habitation rules require mains-powered, interlinked smoke alarms on every storey and CO alarms where there is a gas, oil or solid-fuel appliance.
- England’s national room sizes do not apply in Wales; councils set their own room standards.
- Landlords must register with Rent Smart Wales, and those who manage their own lets need a Rent Smart Wales licence.
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 Isle of Anglesey?
| 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 Isle of Anglesey
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 Isle of Anglesey?
Yes, across the whole of Isle of Anglesey.
Who licenses HMOs in Isle of Anglesey?
Isle of Anglesey council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.
Other HMO services in Isle of Anglesey
- Extensions for extra rooms in Isle of Anglesey
- Large HMO conversions (7+ sharers) in Isle of Anglesey
- Escape routes, emergency lighting and fire stopping in Isle of Anglesey
- Ensuite installation in Isle of Anglesey
- Layout changes and room reconfiguration in Isle of Anglesey
- Fire alarm and detection systems in Isle of Anglesey
- Full HMO refurbishment in Isle of Anglesey
- EPC and energy upgrades in Isle of Anglesey