An HMO extension adds space to a shared house, usually a ground-floor bedroom with ensuite or a bigger communal kitchen. For a house in Wimbledon we start with a measured survey, check the council’s written HMO standards for the number of sharers, and then price each item separately.
- Area
- Greater London, England
- Postcodes
- SW19
- Location
- 7 miles south-west of London
- Pricing region
- London
What do extensions for extra rooms in Wimbledon involve?
- Planning route check and drawings
- Kitchen or bedroom fit-out
- Ensuite drainage and extraction
- Heating, insulation and glazing
- Foundations, structure and roof
Which rules apply in Wimbledon?
Here is what usually applies to a Wimbledon 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.
- 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 Wimbledon?
| 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 |
These are typical ranges including VAT, adjusted for London, where costs run above the UK average. The fixed price for a house in Wimbledon follows a site visit.
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 Wimbledon landlords need it?
Typical reasons for this work in Wimbledon:
- Moving to more sharers with consent
- Adding a ground-floor room
Questions about extensions for extra rooms in Wimbledon
Is a kitchen extension worth it?
Often, when the existing kitchen limits how many people the council will allow. A bigger kitchen can unlock an extra room.
Do you cover all of Wimbledon?
Yes. We work across Wimbledon and the SW19 postcode areas, plus the rest of Greater London. Nearby places we also cover include Morden, Mitcham, Putney.
Does a shared house in Wimbledon 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 Wimbledon?
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 Wimbledon
- Morden · 2 mi
- Mitcham · 2 mi
- Putney · 3 mi
- New Malden · 3 mi
- Streatham · 3 mi
- Barnes · 4 mi
- All of Greater London
Other HMO services in Wimbledon
- Loft conversions for extra rooms in Wimbledon
- Communal kitchen refits in Wimbledon
- Layout changes and room reconfiguration in Wimbledon
- Large HMO conversions (7+ sharers) in Wimbledon
- Ensuite installation in Wimbledon
- House to HMO conversion in Wimbledon
- Damp, mould and HHSRS repairs in Wimbledon
- Professional and co-living HMO refurbs in Wimbledon