AgdaPkt 2017-03-27 Closed and Joint SA PFA

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9 Can Local Governments Establish Minimum and Maximum Unit Sizes? Yes, a local government may establish minimum and maximum unit sizes (GC Section 65852.2(c). However, like all development standards (e.g., height, lot coverage, lot size), unit sizes should not burden the development of ADUs. For example, setting a minimum unit size that substantially increases costs or a maximum unit size that unreasonably restricts opportunities would be inconsistent with the intent of the statute. Typical maximum unit sizes range from 800 square feet to 1,200 square feet. Minimum unit size must at least allow for an efficiency unit as defined in Health and Safety Code Section 17958.1. ADU law requires local government approval if meeting various requirements (GC Section 65852.2(a)(1)(D)), including unit size requirements. Specifically, attached ADUs shall not exceed 50 percent of the existing living area or 1,200 square feet and detached ADUs shall not exceed 1,200 square feet. A local government may choose a maximum unit size less than 1,200 square feet as long as the requirement is not burdensome on the creation of ADUs. Can ADUs Exceed General Plan and Zoning Densities? An ADU is an accessory use for the purposes of calculating allowable density under the general plan and zon ing. For example, if a zoning district allows one unit per 7,500 square feet, then an ADU would not be counted as an additional unit. Minimum lot sizes must not be doubled (e.g., 15,000 square feet) to account for an ADU. Further, local governments could elect to allow more than one ADU on a lot. Santa Cruz has confronted a shortage of housing for many years, considering its growth in population from incoming students at UC Santa Cruz and its proximity to Silicon Valley. The city promoted the development of ADUs as critical infill-housing opportunity through various strategies such as creating a manual to promote ADUs. The manual showcases prototypes of ADUs and outlines city zo ning laws and requirements to make it more convenient for homeowners to get information. The City found that homeowners will take time to develop an ADU only if information is easy to find, the process is simple, and there is sufficient guidance on what options they have in regards to design and planning. The city set the minimum lot size requirement at 4,500 sq. ft. to develop an ADU in order to encourage more homes to build an ADU. This allowed for a majority of single-family homes in Santa Cruz to develop an ADU. For more information, see http://www.cityofsantacruz.com/departments/planning-and-community- development/programs/accessory-dwelling-unit-development-program. New developments can increase the total number of affordable units in their project plans by integrating ADUs. Aside from increasing the total number of affordable units, integrating ADUs also promotes housing choices within a development. One such example is the Cannery project in Davis, CA. The Cannery project includes 547 residential units with up to 60 integrated ADUs. ADUs within the Cannery blend in with surrounding architecture, maintaining compatibility with neighborhoods and enhancing community character. ADUs are constructed at the same time as the primary single‐family unit to ensure the affordable rental unit is available in the housing supply concurrent with the availability of market rate housing. 8.B. - Page 59