Granny flat
A granny flat is an informal term for a small self contained or semi-self contained annex within the same building or grounds as a main dwelling . For example a converted garage, loft or garden annex with its own bedroom, bathroom and sometimes kitchen. It is often used to house relatives, but can also be let to unrelated tenants or lodgers.
From a landlord’s perspective, the key issue is whether the granny flat is treated as a separate dwelling. If it has its own front door, services and facilities, it may need:
Separate planning permission and, in some cases, its own council tax band.
Its own EPC, gas and electrical safety checks, and possibly HMO or selective licensing if let to non-family tenants.
If you live in the main house and let the annex while genuinely sharing some facilities, the occupier may be a lodger with fewer possession rights. If it is truly self-contained and used as their only or main home, they are likely to have an assured tenancy with full Renters’ Rights Act protections on notice, rental standards, redress and possession grounds.
Professional landlords treat granny flats as part of their regulated property portfolio. Checking planning and licensing status, documenting exactly what is being let, and ensuring the annex meets all safety and rental standards.
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