The housing fitness standard (that could be a WOF for rentals) comprises a set of nine conditions and amenity requirements deemed to be the minimum necessary for a dwelling house to be fit for human habitation:
1. Have a suitably located lavatory for the exclusive use of the tenants
2. Have a bath and shower and wash hand basin with hot and cold water
3. Have satisfactory facilities for the preparation and cooking of food, including a sink with hot and cold water
4. Have an adequate supply of wholesome water
5. Have an effective system for the drainage of foul waste and surface water.
6. Have an adequate provision for lighting heating and ventilation
7. Be free from dampness prejudicial to the health of tenants.
8. Be free from serious disrepair.
9. Be structurally sound.

Ref: Decent_Housing_Standards – Kevin Reilly