In short: An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Across South 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
- Main towns
- Ayr, Troon, Prestwick
What do extensions for extra rooms in South Ayrshire involve?
- Fire separation and detection extended to the new space
- Planning route check and drawings
- Foundations, structure and roof
- Heating, insulation and glazing
- Ensuite drainage and extraction
- Building control completion
Which rules apply in South 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 South 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 South Ayrshire
Questions about extensions for extra rooms in South Ayrshire
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
Do you handle building control?
Yes, from application to completion certificate.
Do you carry out extensions for extra rooms across South Ayrshire?
Yes, across the whole of South Ayrshire, including Ayr, Troon, Prestwick.
Who licenses HMOs in South Ayrshire?
South Ayrshire council licenses HMOs in its area. Every HMO in Scotland needs a licence.
Other HMO services in South Ayrshire
- Loft conversions for extra rooms in South Ayrshire
- Communal kitchen refits in South Ayrshire
- Layout changes and room reconfiguration in South Ayrshire
- Large HMO conversions (7+ sharers) in South Ayrshire
- Ensuite installation in South Ayrshire
- House to HMO conversion in South Ayrshire
- Rewires and EICR remedials in South Ayrshire
- Full HMO refurbishment in South Ayrshire