An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Landlords in Putney (SW15 and SW18) 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
- SW15 and SW18
- Location
- 5 miles south-west of London
- Pricing region
- London
What do extensions for extra rooms in Putney involve?
- Planning route check and drawings
- Heating, insulation and glazing
- Fire separation and detection extended to the new space
- Party wall coordination where needed
- Foundations, structure and roof
Which rules apply in Putney?
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 Putney 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.
How much do extensions for extra rooms cost in Putney?
| 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 Putney 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 Putney landlords need it?
Landlords in Putney most often ask us for this when:
- Adding a ground-floor room
- A kitchen too small for the number of sharers
Questions about extensions for extra rooms in Putney
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 Putney?
Yes. We work across Putney and the SW15 and SW18 postcode areas, plus the rest of Greater London. Nearby places we also cover include Barnes, Fulham, Wimbledon.
Does a shared house in Putney need an HMO licence?
In England, a mandatory licence is needed for 5 or more people from 2 or more households. Smaller HMOs can need a licence where the council runs additional licensing, which is common in towns with many shared houses. Check the council’s website for the address.
How much do extensions for extra rooms cost in Putney?
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 Putney
- Barnes · 2 mi
- Fulham · 2 mi
- Wimbledon · 3 mi
- Chelsea · 3 mi
- Chiswick · 3 mi
- Battersea · 3 mi
- All of Greater London
Other HMO services in Putney
- Loft conversions for extra rooms in Putney
- Communal kitchen refits in Putney
- Layout changes and room reconfiguration in Putney
- Large HMO conversions (7+ sharers) in Putney
- Ensuite installation in Putney
- House to HMO conversion in Putney
- Bedroom upgrades and room refits in Putney
- Void and between-tenancy refurbs in Putney