An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Southall, a town of around 80,000 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
- UB1, UB2, UB6 and UB18
- Location
- 11 miles west of London
- Council
- London Borough of Ealing
- Pricing region
- London
What do extensions for extra rooms in Southall involve?
- Building control completion
- Heating, insulation and glazing
- Ensuite drainage and extraction
- Planning route check and drawings
- Foundations, structure and roof
Which rules apply in Southall?
Here is what usually applies to a Southall job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
- Building regulations cover structural changes, new partitions, ensuite drainage, fire-resisting construction and notifiable electrical work.
- The Fire Safety Order 2005 applies to the common parts of HMOs, enforced by the fire and rescue authority.
- 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 Southall 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 Southall?
| 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 |
These are typical ranges including VAT, adjusted for London, where costs run above the UK average. The fixed price for a house in Southall follows a site visit.
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 Southall landlords need it?
We usually get the call when:
- Adding a ground-floor room
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Southall
Do you handle building control?
Yes, from application to completion certificate.
Which postcodes in Southall do you work in?
All of them, including UB1, UB2, UB6 and UB18, and the surrounding parts of Greater London.
Which council covers HMOs in Southall?
Southall 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 Southall?
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 Southall
- Greenford · 2 mi
- Heston · 2 mi
- Hayes · 2 mi
- Isleworth · 3 mi
- Northolt · 3 mi
- Hounslow · 3 mi
- All of Greater London
Other HMO services in Southall
- Loft conversions for extra rooms in Southall
- Communal kitchen refits in Southall
- Layout changes and room reconfiguration in Southall
- Large HMO conversions (7+ sharers) in Southall
- Ensuite installation in Southall
- House to HMO conversion in Southall
- Student HMO refurbishment in Southall
- HMO fire safety upgrades in Southall