In short: An HMO loft conversion adds one or two letting rooms, often with an ensuite, in the roof space. Across Pembrokeshire, the work is planned around Wales’s HMO rules and the standards the local council publishes.
- Nation
- Wales
- Pricing region
- Wales
- Postcode areas
- SA
- Main towns
- Haverfordwest, Milford Haven
What do loft conversions for extra rooms in Pembrokeshire involve?
- Feasibility and head-height check
- Fire doors and extended alarm system
- Dormer or roof windows
- Structural design and steelwork
- Building control sign-off
- Planning or permitted development check
Which rules apply in Pembrokeshire?
- 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.
- Councils such as Cardiff and Swansea run additional licensing for HMOs outside the mandatory scheme.
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 Pembrokeshire?
| 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 Pembrokeshire
Questions about loft conversions for extra rooms in Pembrokeshire
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 Pembrokeshire?
Yes, across the whole of Pembrokeshire, including Haverfordwest, Milford Haven.
Who licenses HMOs in Pembrokeshire?
Pembrokeshire council licenses HMOs in its area. Landlords must also register with Rent Smart Wales.
Other HMO services in Pembrokeshire
- Extensions for extra rooms in Pembrokeshire
- Large HMO conversions (7+ sharers) in Pembrokeshire
- Escape routes, emergency lighting and fire stopping in Pembrokeshire
- Ensuite installation in Pembrokeshire
- Layout changes and room reconfiguration in Pembrokeshire
- Fire alarm and detection systems in Pembrokeshire
- Rewires and EICR remedials in Pembrokeshire
- Full HMO refurbishment in Pembrokeshire