Fullerton has updated its ADU ordinance to comply with new state laws. Below are the up-to-date requirements for permitting an ADU in Fullerton
Updated Jul 27, 2022
When it comes to adding an extra unit to your home, many homeowners in Fullerton are turning to building ADUs. These accessory dwelling units can provide much-needed extra space for guests, family members, or even renters. And, because they’re typically built on existing properties, they can be a more affordable option than buying a new home or building a new home.
All properties zoned for single family and multifamily use may be eligible to build ADUs.
Number of units
The number of ADUs you’re able to build depends on how your lot is zoned:
Lots zoned for single family use may add 1 ADU and 1 Jr. ADU (JADU).
Lots zoned for multi-family may add 2 new detached ADUs and at least one conversion ADU (interior conversion of existing building, but no more than 25% of the original number of units. (E.g. an apartment with 4 units may add 2 detached ADUs and 1 conversion ADU.)
The maximum size is 500.0 sq. ft. for a JADU
Not to exceed 1,200 sq. ft. max for a detached ADU
Attached ADU Max Size: 1,000 sq. ft. or 50% of floor area of primary dwelling, whichever is greater, not
to exceed 1,200 sq. ft.
Attached or detached ADUs shall comply with the height standards applicable to the zone in which it is located. Limited to height allowed in the zone
One-story 20 feet above natural grade
Two-story 30 feet above natural grade
One parking space is required for an ADU with one or more bedrooms unless property meets provisions to waive parking requirement.
Want to learn more about ADU regulations in your area?
Book a free consultation and estimate with a Cottage ADU Expert to find out what’s possible on your property!