A house to HMO conversion turns a single-family home into a house in multiple occupation: a shared home for unrelated people with private bedrooms and shared kitchen or bathroom space. For a house in Chiswick 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
- W4
- Location
- 6 miles west of London
- Pricing region
- London
What does house to HMO conversion in Chiswick involve?
- A communal kitchen sized for the number of sharers
- New stud walls, door openings and room splits
- Extra bathrooms, shower rooms or ensuites
- Measured survey and room-size check against the licensing standards
- Rewiring or upgrades, with an electrical certificate
Which rules apply in Chiswick?
House to HMO conversion in Chiswick must satisfy national law for England, the council’s written HMO standards and, where walls, drainage or fire separation change, the building rules. In short:
- Mandatory HMO licence for 5 or more people in 2 or more households (since October 2018); councils can add additional licensing for smaller HMOs.
- Licensed HMOs must meet national minimum bedroom sizes: 6.51 m² for one person aged 10 or over, 10.22 m² for two, and 4.64 m² for a child under 10.
- Council standards often step up at 5 and 6 sharers, for example a separate WC at 5 and a second bathroom from 6.
- 7 or more sharers is a sui generis large HMO and normally needs planning permission.
How much does house to HMO conversion cost in Chiswick?
| Item | UK typical | Local guide | Per |
|---|---|---|---|
| Typical 3–4 bed house to a 5–6 bed HMO, all-in | £30,000 – £75,000 | £38,400 – £96,000 | project |
| Conversion works per letting room (walls, linings, electrics, decoration; excludes kitchens, bathrooms and fire systems; our estimate) | £3,500 – £6,500 | £4,500 – £8,300 | letting room |
| Ensuite shower room added to a bedroom | £4,000 – £10,000 | £5,100 – £12,800 | ensuite |
| Communal HMO kitchen with extra cooking and sink capacity (our estimate from domestic ranges) | £8,000 – £18,000 | £10,250 – £23,050 | kitchen |
| Interlinked mains alarm system (Grade D type), small HMO (our estimate from installer guides) | £800 – £2,000 | £1,000 – £2,550 | house |
Use these as a starting point for budgeting. Access, condition and the council’s requirements in Chiswick can move the figure either way, which is why we quote after seeing the house.
How long does it take?
Allow 6–14 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 Chiswick landlords need it?
Landlords in Chiswick most often ask us for this when:
- A council has said an existing shared house needs works before a licence
- A family let is moving to room-by-room letting
Questions about house to HMO conversion in Chiswick
Do I need planning permission to turn a house into an HMO?
It depends on the nation, the council and the number of sharers. In England, three to six unrelated sharers is use class C4, and moving from a family house is usually permitted development unless the council has an Article 4 direction; seven or more normally needs permission. In Wales a change to an HMO always needs permission, in Northern Ireland all new HMOs need it, and in Scotland council policy decides. We check the address before drawings start.
Which postcodes in Chiswick do you work in?
All of them, including W4, and the surrounding parts of Greater London.
Where do I check the HMO rules for an address in Chiswick?
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 does house to HMO conversion cost in Chiswick?
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.
House to HMO conversion near Chiswick
- Acton · 1 mi
- Barnes · 1 mi
- Shepherds Bush · 2 mi
- Notting Hill · 3 mi
- Fulham · 3 mi
- Putney · 3 mi
- All of Greater London
Other HMO services in Chiswick
- Small HMO conversions (3–6 sharers) in Chiswick
- Large HMO conversions (7+ sharers) in Chiswick
- HMO fire safety upgrades in Chiswick
- Ensuite installation in Chiswick
- Communal kitchen refits in Chiswick
- Layout changes and room reconfiguration in Chiswick
- Full HMO refurbishment in Chiswick
- Rewires and EICR remedials in Chiswick