There is legislation, which states how many people can live in a property before it is overcrowded. This is based on standards, which allow other rooms besides bedrooms to be used for sleeping. This legislation may change in future but at present it states that:

A dwelling is overcrowded if the number of persons sleeping in it is more than the “permitted number”, or is such that two or more of those persons, being ten years old or over, of opposite sexes (not being persons living together as man and wife), must sleep in the same room.

The “permitted number” for your dwelling is on your tenancy agreement or can be obtained from your Housing Officer. In counting the number of persons each child under 10 counts as half a person, and child of less than one year does not count at all.

If you allow your property to be overcrowded you will be committing an offence and could be fined.