An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Landlords in Northolt (HA2, UB4, UB5 and UB6) usually come to us with a council letter, a fire risk assessment or a house they have just bought. We price from whichever you have.
- Area
- Greater London, England
- Postcodes
- HA2, UB4, UB5 and UB6
- Location
- 11 miles west of London
- Pricing region
- London
What do extensions for extra rooms in Northolt involve?
- Foundations, structure and roof
- Party wall coordination where needed
- Kitchen or bedroom fit-out
- Ensuite drainage and extraction
- Fire separation and detection extended to the new space
Which rules apply in Northolt?
The rules below are the England-wide position for this kind of work. Councils add their own standards and schemes on top, so we always check the address in Northolt before we price.
- 3–6 unrelated sharers is use class C4; changing from a family house is usually permitted development unless an Article 4 direction applies.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
- Smoke alarms on every storey with living accommodation and CO alarms by fixed combustion appliances (other than gas cookers) are required by law.
- National rules ask for an adequate number of bathrooms, WCs and basins and suitably located kitchens; numeric ratios are set by each council.
How much do extensions for extra rooms cost in Northolt?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Single-storey extension, about 15 m² | £35,000 – £60,000 | £44,800 – £76,800 | project |
| Single-storey extension per m² | £1,800 – £4,000 | £2,300 – £5,100 | m² |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Northolt 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 Northolt landlords need it?
We usually get the call when:
- A kitchen too small for the number of sharers
- Adding a ground-floor room
Questions about extensions for extra rooms in Northolt
Can I extend an HMO under permitted development?
Some extensions to houses are permitted development, but rules differ for HMOs and by nation and council. We check the address before design.
Which postcodes in Northolt do you work in?
All of them, including HA2, UB4, UB5 and UB6, and the surrounding parts of Greater London.
Where do I check the HMO rules for an address in Northolt?
With the local council for the address. Councils in England can add additional licensing and Article 4 directions on top of the national rules. Check the council’s website for the exact address before you buy or start work.
How much do extensions for extra rooms cost in Northolt?
Our guide ranges for London 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 Northolt
- Greenford · 1 mi
- Harrow · 3 mi
- Southall · 3 mi
- Brent · 3 mi
- Ruislip · 3 mi
- Wembley · 3 mi
- All of Greater London
Other HMO services in Northolt
- Loft conversions for extra rooms in Northolt
- Communal kitchen refits in Northolt
- Layout changes and room reconfiguration in Northolt
- Large HMO conversions (7+ sharers) in Northolt
- Ensuite installation in Northolt
- House to HMO conversion in Northolt
- Void and between-tenancy refurbs in Northolt
- Full HMO refurbishment in Northolt