An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Brent, a city of around 350,000 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
- HA0 and HA9
- Location
- 8 miles west of London
- Council
- London Borough of Brent
- Pricing region
- London
What do extensions for extra rooms in Brent involve?
- Foundations, structure and roof
- Kitchen or bedroom fit-out
- Heating, insulation and glazing
- Building control completion
- Planning route check and drawings
Which rules apply in Brent?
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 Brent before we price.
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
- 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.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
London Borough of Brent: local HMO schemes
| Article 4 (HMO) | In force across the council area Borough-wide Article 4 Direction (C3 to C4) since 1 Nov 2022. |
|---|---|
| Additional licensing | In force across the council area Borough-wide additional licensing in force 2 Feb 2026 to 1 Feb 2031. |
| Selective licensing | In force in part of the council area All wards except Wembley Park: Dollis Hill, Harlesden & Kensal Green, Willesden Green 1 Aug 2023-31 Jul 2028; 18 further wards 1 Apr 2024-31 Mar 2029. |
Schemes change. Check the council’s current pages for the exact address in Brent before you buy or start work. Source: London Borough of Brent HMO licensing page, checked 2026-10-31.
How much do extensions for extra rooms cost in Brent?
| 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 Brent 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 Brent, tell us at the first call so the programme is built around it.
When do Brent 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 Brent
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 Brent do you work in?
All of them, including HA0 and HA9, and the surrounding parts of Greater London.
Which council covers HMOs in Brent?
Brent is covered by London Borough of Brent. 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 Brent?
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 Brent
- Wembley · 0 mi
- Harrow · 2 mi
- Greenford · 3 mi
- Northolt · 3 mi
- Acton · 3 mi
- Willesden · 3 mi
- All of Greater London
Other HMO services in Brent
- Loft conversions for extra rooms in Brent
- Communal kitchen refits in Brent
- Layout changes and room reconfiguration in Brent
- Large HMO conversions (7+ sharers) in Brent
- Ensuite installation in Brent
- House to HMO conversion in Brent
- HMO fire safety upgrades in Brent
- Professional and co-living HMO refurbs in Brent