An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Dumbarton, a town of about 20,000 people in West Dunbartonshire, the work is planned around the HMO rules for Scotland and the council’s written HMO standards.
- Area
- West Dunbartonshire, Scotland
- Postcodes
- G82
- Location
- 13 miles north-west of Glasgow
- Pricing region
- Scotland
What do extensions for extra rooms in Dumbarton involve?
- Planning route check and drawings
- Fire separation and detection extended to the new space
- Kitchen or bedroom fit-out
- Foundations, structure and roof
- Party wall coordination where needed
Which rules apply in Dumbarton?
Extensions for extra rooms in Dumbarton must satisfy national law for Scotland, the council’s written HMO standards and, where walls, drainage or fire separation change, the building rules. In short:
- 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.
How much do extensions for extra rooms cost in Dumbarton?
| 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 |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Dumbarton can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Typical time on site: 8–14 weeks. We agree the programme with you before starting and send photo updates as the work progresses.
When do Dumbarton landlords need it?
We usually get the call when:
- Moving to more sharers with consent
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Dumbarton
Do you handle building control?
Yes, from application to completion certificate.
Which postcodes in Dumbarton do you work in?
All of them, including G82, and the surrounding parts of West Dunbartonshire.
Where do I check the HMO rules for an address in Dumbarton?
With the local council for the address. 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 Dumbarton?
Our guide ranges for Scotland are in the table on this page, and the guide-price tool gives a figure for your house. A fixed written quote follows a free site visit.
Extensions for extra rooms near Dumbarton
- Vale of Leven · 2 mi
- Port Glasgow · 5 mi
- Erskine · 6 mi
- Clydebank · 7 mi
- Greenock · 7 mi
- Helensburgh · 7 mi
- All of West Dunbartonshire
Other HMO services in Dumbarton
- Loft conversions for extra rooms in Dumbarton
- Communal kitchen refits in Dumbarton
- Layout changes and room reconfiguration in Dumbarton
- Large HMO conversions (7+ sharers) in Dumbarton
- Ensuite installation in Dumbarton
- House to HMO conversion in Dumbarton
- Full HMO refurbishment in Dumbarton
- Small HMO conversions (3–6 sharers) in Dumbarton