Q: Our neighbor tells us he now has an ADU and a couple lives in it. The structure is in his backyard so I want to be sure I know, just what is an ADU, and is it legal?
S.A., Hermosa Beach
A: ADU stands for accessory dwelling unit. Other names or descriptions include granny flat, in-law units, backyard cottages and secondary units.
Many tout the benefit of an ADU as a more affordable form of housing that can be constructed, or a structure that can be renovated, and which does not require paying for land, or significant new infrastructure, an elevator or parking. For a homeowner, the ADU can be a source of income. For the occupant(s), it can provide economical housing. Since Jan. 1, 2021, the California Health and Safety Code has mandated that cities and counties develop a plan to incentivize and promote ADUs.
So, yes, an ADU is legal here, but there are criteria and guidelines. Below is an informative online link that also includes a brochure published by the California Department of Housing and Community Development about ADUs.
There are various kinds of ADU: (a) Detached, which is a unit separated from the primary structure (this sounds like what your neighbor has in place); (b) Attached, which simply means attached to the primary structure; (c) Converted Existing Space, which signifies a storage area or garage that is converted to an independent living unit; and (D) Junior Accessory Dwelling Unit, a distinct type of converted space that already exists and which is fully contained as part of a single-family residence.
ADUs can come in different sizes and have a different number of rooms. Depending on these options, there are rules that may apply. Thus, consultation with a knowledgeable professional is most prudent. You may find that some businesses specialize in constructing ADUs. Due diligence is important to find a reliable, knowledgeable person to guide or to assist you.
Resource
The California Department of Housing and Community Development has a…
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