In short: An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Across North Ayrshire, the work is planned around Scotland’s HMO rules and the standards the local council publishes.
- Nation
- Scotland
- Pricing region
- Scotland
- Postcode areas
- KA, PA
- Main towns
- Irvine, Kilwinning, Saltcoats
What do extensions for extra rooms in North Ayrshire involve?
- Building control completion
- Planning route check and drawings
- Ensuite drainage and extraction
- Party wall coordination where needed
- Kitchen or bedroom fit-out
- Foundations, structure and roof
Which rules apply in North Ayrshire?
- Scotland has no C4 use class: up to 5 residents can fall within Class 9 (houses), and HMO planning policy is set by each council, some of which require permission at lower numbers.
- A building warrant may be needed for a change of use or for installing a fire alarm system; check with the council’s building standards service.
- Councils set HMO fire standards through licence conditions, often including emergency lighting in larger HMOs.
- Kitchen, WC and bathroom ratios come from council standards; one WC and one bath or shower per 5 people is a common figure.
Scottish councils set their own HMO licence standards and planning policies. Every HMO needs a licence, so check the council’s standards before you design the layout.
How much do extensions for extra rooms cost in North Ayrshire?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £33,250 – £57,000 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £1,700 – £3,800 | m² |
Typical time on site: 8–14 weeks. For a figure for your house, try the guide-price tool.
Extensions for extra rooms by town in North Ayrshire
Questions about extensions for extra rooms in North Ayrshire
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 North Ayrshire?
Yes, across the whole of North Ayrshire, including Irvine, Kilwinning, Saltcoats.
Who licenses HMOs in North Ayrshire?
North Ayrshire council licenses HMOs in its area. Every HMO in Scotland needs a licence.
Other HMO services in North Ayrshire
- Loft conversions for extra rooms in North Ayrshire
- Communal kitchen refits in North Ayrshire
- Layout changes and room reconfiguration in North Ayrshire
- Large HMO conversions (7+ sharers) in North Ayrshire
- Ensuite installation in North Ayrshire
- House to HMO conversion in North Ayrshire
- Rewires and EICR remedials in North Ayrshire
- Student HMO refurbishment in North Ayrshire