An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. Streatham is 5 miles south of London. We price extensions for extra rooms there against England’s HMO rules and the council’s written HMO standards, so work is planned to the standard an inspection looks for.
- Area
- Greater London, England
- Postcodes
- SW2 and SW16
- Location
- 5 miles south of London
- Pricing region
- London
What do extensions for extra rooms in Streatham involve?
- Building control completion
- Foundations, structure and roof
- Heating, insulation and glazing
- Ensuite drainage and extraction
- Fire separation and detection extended to the new space
Which rules apply in Streatham?
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 Streatham before we price.
- 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.
- 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.
- 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 Streatham?
| 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 Streatham 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 Streatham 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 Streatham
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 Streatham do you work in?
All of them, including SW2 and SW16, and the surrounding parts of Greater London.
Does a shared house in Streatham 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 Streatham?
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 Streatham
- Mitcham · 2 mi
- Brixton · 3 mi
- Wimbledon · 3 mi
- Battersea · 3 mi
- Croydon · 3 mi
- Morden · 4 mi
- All of Greater London
Other HMO services in Streatham
- Loft conversions for extra rooms in Streatham
- Communal kitchen refits in Streatham
- Layout changes and room reconfiguration in Streatham
- Large HMO conversions (7+ sharers) in Streatham
- Ensuite installation in Streatham
- House to HMO conversion in Streatham
- Shared bathroom and shower room refits in Streatham
- Licence condition and schedule-of-works in Streatham