Assured Tenancy Allowances: The relevant interest
CAA01/S495 and CAA01/S500
The relevant interest in a building is the interest that the person who incurred construction expenditure on the building had when the construction expenditure was incurred.
The rules for when the relevant interest is a leasehold interest that comes to an end are the same as the IBA rules CA33050.
A dwelling house may be a flat or a maisonette contained in a larger building. The relevant interest in a dwelling house that is part of a larger building is the part of the relevant interest in the larger building that subsists in the dwelling house. For example, the relevant interest in a flat contained in a block of flats whose relevant interest is the freehold is the freehold interest in that flat.