In short: An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Across West Dunbartonshire, the work is planned around Scotland’s HMO rules and the standards the local council publishes.
- Nation
- Scotland
- Pricing region
- Scotland
- Postcode areas
- G
- Main towns
- Clydebank, Vale of Leven, Dumbarton
What do extensions for extra rooms in West Dunbartonshire involve?
- Ensuite drainage and extraction
- Foundations, structure and roof
- Fire separation and detection extended to the new space
- Heating, insulation and glazing
- Planning route check and drawings
- Building control completion
Which rules apply in West Dunbartonshire?
- 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.
- The tolerable standard requires interlinked smoke alarms in the main living room and circulation spaces and a heat alarm in the kitchen; licensed HMOs must meet the council’s higher standard.
- Kitchen, WC and bathroom ratios come from council standards; one WC and one bath or shower per 5 people is a common figure.
- Councils set HMO fire standards through licence conditions, often including emergency lighting in larger HMOs.
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 West Dunbartonshire?
| 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 West Dunbartonshire
Questions about extensions for extra rooms in West Dunbartonshire
Do you handle building control?
Yes, from application to completion certificate.
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 West Dunbartonshire?
Yes, across the whole of West Dunbartonshire, including Clydebank, Vale of Leven, Dumbarton.
Who licenses HMOs in West Dunbartonshire?
West Dunbartonshire council licenses HMOs in its area. Every HMO in Scotland needs a licence.
Other HMO services in West Dunbartonshire
- Loft conversions for extra rooms in West Dunbartonshire
- Communal kitchen refits in West Dunbartonshire
- Layout changes and room reconfiguration in West Dunbartonshire
- Large HMO conversions (7+ sharers) in West Dunbartonshire
- Ensuite installation in West Dunbartonshire
- House to HMO conversion in West Dunbartonshire
- Professional and co-living HMO refurbs in West Dunbartonshire
- Full HMO refurbishment in West Dunbartonshire