Minimum standards for a licence
A licence is required for an HMO if it is required under mandatory licensing, additional licensing or selective licensing.
Currently, only HMOs that are not self contained flats (although an individual flat could in theory require a licence) have five persons or more occupying and three storeys or more etc. (see "do I require a licence" for more info)
These pages consider the minimum standards that are required should a licence be required under the mandatory (usually bedsit type accommodation) and if additional licensing was designated in your area, the minimum standards for a section 257 HMO (certain converted blocks of flats).
Minimum standards for a property under mandatory licensing, usually bedsit type accommodation, five persons, three storeys etc.
Additional licensing section 257 HMOs
Wales