An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Landlords in Sutton (CR44, SM1, SM2 and SM3) usually come to us with a council letter, a fire risk assessment or a house they have just bought. We price from whichever you have.
- Area
- Greater London, England
- Postcodes
- CR44, SM1, SM2 and SM3
- Location
- 11 miles south of London
- Pricing region
- London
What do extensions for extra rooms in Sutton involve?
- Fire separation and detection extended to the new space
- Planning route check and drawings
- Ensuite drainage and extraction
- Foundations, structure and roof
- Heating, insulation and glazing
Which rules apply in Sutton?
Here is what usually applies to a Sutton job of this kind. It is general information rather than legal advice, and the council’s written HMO standards have the final detail.
- 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.
- The Fire Safety Order 2005 applies to the common parts of HMOs, enforced by the fire and rescue authority.
- 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 Sutton?
| 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 Sutton can move the figure either way, which is why we quote after seeing the house.
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 Sutton 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 Sutton
Can I extend an HMO under permitted development?
Some extensions to houses are permitted development, but rules differ for HMOs and by nation and council. We check the address before design.
Do you cover all of Sutton?
Yes. We work across Sutton and the CR44, SM1, SM2 and SM3 postcode areas, plus the rest of Greater London. Nearby places we also cover include Carshalton, Banstead, Ewell.
Where do I check the HMO rules for an address in Sutton?
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 Sutton?
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 Sutton
- Carshalton · 2 mi
- Banstead · 2 mi
- Ewell · 2 mi
- Wallington · 2 mi
- Coulsdon · 3 mi
- Epsom · 3 mi
- All of Greater London
Other HMO services in Sutton
- Loft conversions for extra rooms in Sutton
- Communal kitchen refits in Sutton
- Layout changes and room reconfiguration in Sutton
- Large HMO conversions (7+ sharers) in Sutton
- Ensuite installation in Sutton
- House to HMO conversion in Sutton
- Void and between-tenancy refurbs in Sutton
- Full HMO refurbishment in Sutton