The detail.
C3 has three parts covering different household arrangements. Some shared homes instead fall within C4 or may be sui generis. The way the property is occupied matters.
This guidance applies to England. The lawful use, conditions, any proposed works and the facts of the operation should be checked for each property.
What to check.
- Check the number of occupants and how they live together.
- Review the planning history, any conditions and the proposed use.
A planning adviser or the local planning authority can advise on the specific property and proposal.
Sources.
Sources reviewed 6 November 2026. General information, not a planning opinion.