An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. For a house in Johnstone we start with a measured survey, check the council’s written HMO standards for the number of sharers, and then price each item separately.
- Area
- Renfrewshire, Scotland
- Postcodes
- PA5 and PA10
- Location
- 10 miles west of Glasgow
- Pricing region
- Scotland
What do extensions for extra rooms in Johnstone involve?
- Building control completion
- Foundations, structure and roof
- Fire separation and detection extended to the new space
- Heating, insulation and glazing
- Kitchen or bedroom fit-out
Which rules apply in Johnstone?
Here is what usually applies to a Johnstone job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- 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.
How much do extensions for extra rooms cost in Johnstone?
| 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 |
Prices in Johnstone are shown with our regional adjustment for Scotland (below the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
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 Johnstone landlords need it?
We usually get the call when:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Johnstone
Will the extension affect neighbours?
Possibly, if it is on or near a boundary. Party wall procedures may apply in England and Wales.
Which postcodes in Johnstone do you work in?
All of them, including PA5 and PA10, and the surrounding parts of Renfrewshire.
Does a shared house in Johnstone need an HMO licence?
Yes, if 3 or more people who are not from one or two families share amenities as their main home: every HMO in Scotland needs a licence from the council, lasting up to 3 years.
How much do extensions for extra rooms cost in Johnstone?
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 Johnstone
- Paisley · 3 mi
- Barrhead · 5 mi
- Erskine · 6 mi
- Renfrew · 6 mi
- Clydebank · 7 mi
- Newton Mearns · 8 mi
- All of Renfrewshire
Other HMO services in Johnstone
- Loft conversions for extra rooms in Johnstone
- Communal kitchen refits in Johnstone
- Layout changes and room reconfiguration in Johnstone
- Large HMO conversions (7+ sharers) in Johnstone
- Ensuite installation in Johnstone
- House to HMO conversion in Johnstone
- Student HMO refurbishment in Johnstone
- EPC and energy upgrades in Johnstone