Landlord

What Does Landlord Mean?
A real estate owner who rents or leases land or a building to another party, known as a tenant. The landlord will often provide the necessary maintenance or repairs during the rental period, while the tenant is responsible for the cleanliness and general upkeep of the property.

A female landlord may be referred to as a "landlady."

Investopedia explains Landlord
For real estate investors, becoming a landlord can be a profitable venture. It often provides a steady stream of income from the renter, while maintaining ownership over a property that is likely to appreciate in value.