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 Hayes 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
- Greater London, England
- Postcodes
- UB3, UB4, UB8 and UB11
- Location
- 13 miles west of London
- Pricing region
- London
What do extensions for extra rooms in Hayes involve?
- Fire separation and detection extended to the new space
- Party wall coordination where needed
- Kitchen or bedroom fit-out
- Foundations, structure and roof
- Planning route check and drawings
Which rules apply in Hayes?
Extensions for extra rooms in Hayes must satisfy national law for England, the council’s written HMO standards and, where walls, drainage or fire separation change, the building rules. In short:
- 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.
- 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.
How much do extensions for extra rooms cost in Hayes?
| 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 Hayes follows a site visit.
How long does it take?
Most jobs of this kind take 8–14 weeks. If a council deadline applies in Hayes, tell us at the first call so the programme is built around it.
When do Hayes landlords need it?
Typical reasons for this work in Hayes:
- Adding a ground-floor room
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Hayes
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 Hayes do you work in?
All of them, including UB3, UB4, UB8 and UB11, and the surrounding parts of Greater London.
Where do I check the HMO rules for an address in Hayes?
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 Hayes?
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 Hayes
- Southall · 2 mi
- Heston · 3 mi
- Greenford · 3 mi
- Northolt · 3 mi
- Uxbridge · 3 mi
- Ruislip · 4 mi
- All of Greater London
Other HMO services in Hayes
- Loft conversions for extra rooms in Hayes
- Communal kitchen refits in Hayes
- Layout changes and room reconfiguration in Hayes
- Large HMO conversions (7+ sharers) in Hayes
- Ensuite installation in Hayes
- House to HMO conversion in Hayes
- Commercial and above-shop to HMO in Hayes
- Rewires and EICR remedials in Hayes