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A granny flat is a typically self-contained external dwelling, detached from the main property. The term ‘granny flat’ is contrived from the traditional use of the structure. Families have used granny flats as a convenient alternative for housing aging relatives.
Yes, the original purpose of granny flats was for housing aging relatives. Granny flats fall into the ‘tiny house’ category and usually feature many properties of a regular house. Granny flats are self-contained units that include bedrooms, a bathroom, kitchen, eating area and more.
Some granny flats are built as entirely new structures away from the existing property. Others are conversions of garages or basements. The size of these structures can vary anywhere from 100-400 square feet. Some are even as small as 80 square feet!
They are numerous factors that affect the cost of building a granny flat. You can expect to spend anywhere from $20,000 - $250,000 depending on whether you choose to go with a prefab or self-build, labour costs, foundations, groundwork, and much much more.
Some people might refer to a granny flat as an in-law apartment, annexe, accessory apartment, au-pair suite or in-law rental.