An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In Chelsea, a town of around 60,000 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
- SW3 and SW10
- Location
- 2 miles south-west of London
- Pricing region
- London
What do extensions for extra rooms in Chelsea involve?
- Building control completion
- Kitchen or bedroom fit-out
- Fire separation and detection extended to the new space
- Planning route check and drawings
- Foundations, structure and roof
Which rules apply in Chelsea?
Here is what usually applies to a Chelsea 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.
- A conversion can be a material change of use under the building regulations, so confirm with building control before work starts.
- 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.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
How much do extensions for extra rooms cost in Chelsea?
| 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 Chelsea can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Allow 8–14 weeks on site for a typical job. Drawings, approvals and long-lead items such as kitchens or fire door sets are booked before we start.
When do Chelsea landlords need it?
Typical reasons for this work in Chelsea:
- Moving to more sharers with consent
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Chelsea
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 Chelsea do you work in?
All of them, including SW3 and SW10, and the surrounding parts of Greater London.
Where do I check the HMO rules for an address in Chelsea?
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 Chelsea?
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 Chelsea
- Battersea · 1 mi
- Fulham · 1 mi
- Pimlico · 1 mi
- City of Westminster · 2 mi
- Notting Hill · 2 mi
- London · 2 mi
- All of Greater London
Other HMO services in Chelsea
- Loft conversions for extra rooms in Chelsea
- Communal kitchen refits in Chelsea
- Layout changes and room reconfiguration in Chelsea
- Large HMO conversions (7+ sharers) in Chelsea
- Ensuite installation in Chelsea
- House to HMO conversion in Chelsea
- Void and between-tenancy refurbs in Chelsea
- Small HMO conversions (3–6 sharers) in Chelsea