An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. In New Malden, a town of about 24,000 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
- KT3, KT4 and SW20
- Location
- 9 miles south-west of London
- Pricing region
- London
What do extensions for extra rooms in New Malden involve?
- Fire separation and detection extended to the new space
- Planning route check and drawings
- Foundations, structure and roof
- Heating, insulation and glazing
- Building control completion
Which rules apply in New Malden?
Here is what usually applies to a New Malden 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.
- 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 New Malden?
| 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 |
Prices in New Malden are shown with our regional adjustment for London (above the UK average). Your quote is itemised and fixed in writing once the scope and specification are agreed.
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 New Malden landlords need it?
We usually get the call when:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in New Malden
Do you handle building control?
Yes, from application to completion certificate.
Do you cover all of New Malden?
Yes. We work across New Malden and the KT3, KT4 and SW20 postcode areas, plus the rest of Greater London. Nearby places we also cover include Surbiton, Morden, Wimbledon.
Does a shared house in New Malden 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 New Malden?
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 New Malden
- Surbiton · 2 mi
- Morden · 3 mi
- Wimbledon · 3 mi
- Ewell · 4 mi
- Mitcham · 4 mi
- Sutton · 4 mi
- All of Greater London
Other HMO services in New Malden
- Loft conversions for extra rooms in New Malden
- Communal kitchen refits in New Malden
- Layout changes and room reconfiguration in New Malden
- Large HMO conversions (7+ sharers) in New Malden
- Ensuite installation in New Malden
- House to HMO conversion in New Malden
- Full HMO refurbishment in New Malden
- Licence condition and schedule-of-works in New Malden