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Secondary suites (also known as accessory dwelling units, ADUs, in-law apartments and granny flats) are self-contained apartments, cottages, or small residential units, that are located on a property that has a separate main, single-family home, duplex, or other residential unit. In some cases, the ADU or in-law is attached to the principal dwelling or is an entirely separate unit, located above a garage or in the backyard on the same property. In
British English British English (BrE, en-GB, or BE) is, according to Lexico, Oxford Dictionaries, "English language, English as used in Great Britain, as distinct from that used elsewhere". More narrowly, it can refer specifically to the English language in ...
the term ''annex'' or ''granny annex'' is used instead. Reasons for wanting to add a secondary suite to a property may be to receive additional income, provide social and personal support to a family member, or obtain greater security.


Description


Background

Naming conventions vary by time-period and location but secondary suites can also be referred to as an accessory dwelling unit (ADU), mother-in-law suite, granny flat, coach house, laneway house, Ohana dwelling unit, granny annexe, granny suite, in-law suite, and accessory apartment. The prevalence of secondary suites is also dependent on time and location with varying rates depending on the country, state, or city. Furthermore, regulations on secondary suites can vary widely in different jurisdictions with some allowing them with limited regulation while others ban them entirely through zoning, limit who may live in the units (for example, family members only), or regulate if units can be rented. In recent years, there has been a rise in the popularity of these units as a source of additional, passive income, or as a multigenerational living option.


Relationship to main residence

A secondary suite is considered "secondary" or "accessory" to the primary residence on the parcel. It normally has its own entrance, kitchen, bathroom and living area. There are three types of accessory units: interior, interior with modification, and detached. Examples of these accessory units include: * A suite above a rear detached garage (a "
garage apartment A garage apartment is an apartment built within the walls of, or on top of, the garage of a house. The garage may be attached or a separate building from the main house, but will have a separate entrance and may or may not have a communicating doo ...
"), * A suite above the main floor of a single-detached dwelling, * A suite below the main floor of a single-detached dwelling (a " basement suite"). * A suite attached to a single-detached dwelling at g