An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Greenford, a town of about 38,000 people in Greater London, the work is planned around the HMO rules for England and the council’s written HMO standards.
- Area
- Greater London, England
- Postcodes
- UB6 and W7
- Location
- 10 miles west of London
- Council
- London Borough of Ealing
- Pricing region
- London
What do extensions for extra rooms in Greenford involve?
- Planning route check and drawings
- Building control completion
- Party wall coordination where needed
- Ensuite drainage and extraction
- Heating, insulation and glazing
Which rules apply in Greenford?
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 Greenford 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.
- Building regulations cover structural changes, new partitions, ensuite drainage, fire-resisting construction and notifiable electrical work.
- Fire precautions follow a risk assessment; the LACORS Housing – Fire Safety guide (2008) is guidance, not law, but many councils base their standards on it.
- National rules ask for an adequate number of bathrooms, WCs and basins and suitably located kitchens; numeric ratios are set by each council.
London Borough of Ealing: local HMO schemes
| Article 4 (HMO) | In force across the council area Immediate direction for Perivale from 30 Oct 2024 and non-immediate direction for the rest of the borough from 2025. |
|---|---|
| Additional licensing | In force across the council area Borough-wide additional licensing 1 Apr 2022-31 Mar 2027; renewal consulted 15 Jul-24 Sep 2026. |
| Selective licensing | In force in part of the council area Two designations covering most wards: 1 Apr 2022-31 Mar 2027 (e.g. Southall, East/North Acton) and 3 Jan 2023-2 Jan 2028 (e.g. Greenford, Northolt, Perivale, Ealing Common). |
Schemes change. Check the council’s current pages for the exact address in Greenford before you buy or start work. Source: London Borough of Ealing HMO licensing page, checked 2026-10-31.
How much do extensions for extra rooms cost in Greenford?
| 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 Greenford can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Greenford, tell us at the first call so the programme is built around it.
When do Greenford landlords need it?
Landlords in Greenford most often ask us for this when:
- Adding a ground-floor room
- Moving to more sharers with consent
Questions about extensions for extra rooms in Greenford
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.
How far do you travel from Greenford?
We cover the whole of Greater London and work UK-wide. For Greenford the nearest towns on our list are Northolt (1 miles), Southall (2 miles), Brent (3 miles).
Which council covers HMOs in Greenford?
Greenford is covered by London Borough of Ealing. We read the council’s written HMO standards before pricing, and you should check the licence position for the exact address.
How much do extensions for extra rooms cost in Greenford?
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 Greenford
- Northolt · 1 mi
- Southall · 2 mi
- Brent · 3 mi
- Wembley · 3 mi
- Hayes · 3 mi
- Heston · 3 mi
- All of Greater London
Other HMO services in Greenford
- Loft conversions for extra rooms in Greenford
- Communal kitchen refits in Greenford
- Layout changes and room reconfiguration in Greenford
- Large HMO conversions (7+ sharers) in Greenford
- Ensuite installation in Greenford
- House to HMO conversion in Greenford
- Sound insulation in Greenford
- Full HMO refurbishment in Greenford