Understanding Accessory Dwelling Units
(ADUs) and Their Importance
Beyond traditional construction, widening the range of housing types can increase the housing
supply and help more low-income Californians thrive. Examples of some of these housing types
are accessory dwelling units (ADUs – also referred to as second units, in-law units, casitas, or
granny flats) and junior accessory dwelling units (JADUs).
What is an ADU?
An ADU is accessory to a primary residence and has complete independent living
facilities for one or more persons and has a few variations:
• Detached: The unit is separated from the primary structure.
• Attached: The unit is attached to the primary structure.
• Converted Existing Space: Space (e.g., master bedroom, attached garage,
storage area, or similar use, or an accessory structure) on the lot of the primary
residence that is converted into an independent living unit.
• JADU: A specific type of conversion of existing space that is contained entirely
within an existing or proposed single-family residence.
Per California Residential Code 2022. An attached or detached residential dwelling unit that provides complete independent living facilities for one or more persons, and it is located on a lot with a proposed or existing primary residence. Accessory dwelling units shall include permanent provisions for living, sleeping, eating, cooking and sanitation on the same parcel as the single-family or multifamily dwelling is or will be situated. (See Government Code Section (65852.2).

California’s housing production is not keeping
pace with demand. In the last decade, fewer
than half of the homes needed to keep up with
the population growth were built. Additionally,
new homes are often constructed away from
job-rich areas. This lack of housing that meets
people’s needs is impacting affordability and
causing average housing costs, particularly for
renters in California, to rise significantly. As
affordable housing becomes less accessible,
people drive longer distances between housing
they can afford and their workplace or pack
themselves into smaller shared spaces, both of
which reduce quality of life and produce
negative environmental impacts.
The Accessory Dwelling Unit Handbook was updated in July 2022 and there are several added benefits to build ADU's on existing Single-Family Dwellings.
We can help design and prepare the necessary documentation to apply for an AUD, JADU building permit.
Both City of Fresno CA and Clovis CA have pre-approved plans that can be used to build ADU's.
We can provide the required plot plan and other required calculations to apply for a permit.
We can also design your next ADU as well as convert existing spaces or buildings to ADU's.