AgdaPkt 2020-02-10 Joint Planning Commission Study Session

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3.A - Page 7 of 23 • Building Permit review timeline is 60 days. No discretionary process. C. One -Story: The State now requires cities to allow at least 16 feet in height. Could allow only the minimum required by State law, i.e. a maximum of 16 feet in height for ADUs and accessory structures. Considerations for Option C: • State law has revised several design standards to make single -story ADUs easier to build (reduced setbacks, no replacement parking, increased square footages, etc.). There are limited design barriers to new ADU construction on single-family lots. • Simplifies development standards with no additional formulas required for privacy or roof slope. • Does not allow for covered parking and a living unit in the same footprint, which is common in Redwood City. • Existing detached two-story and second -story ADUs would be considered legal non- conforming uses and would be limited in the ability to increase the size of nonconforming ADUs. Setbacks State law requires cities to adopt setbacks of no more than 4 feet from side and rear yards for both attached and detached ADUs. Therefore, the side and rear setback for detached ADUs would be reduced in the City's ADU ordinance from 6 ft. to 4 ft. The setbacks for accessory structures, such as pool cabanas, offices, etc., currently require up to a 6 ft. side and rear setback. Recommendation: Amend accessory structure setbacks to match accessory dwelling unit setbacks for consistency. Square Footage State law requires cities to allow up to 850 sq. ft. for studios/1-bedroom and up to 1,000 sq. ft. for a 2+ bedroom. Current maximums in the City's ordinance for ADU square footage include 700 sq. ft. for a standard ADU, 900 sq. ft. for an ADU on lots greater than 10,000 sq. ft., and up to 1,000 sq. ft. for ADA compliant ADUs. Recommendation: • Allow a maximum of 850 sq. ft. for studios/1-bedroom ADUs, as required by State law • Allow a maximum 1,000 sq. ft. for 2 -bedroom ADUs, as required by State law • On lots of 10,000 sq. ft. or greater, allow ADUs of 1,000 square feet • Allow a maximum of 1,200 sq. ft. for ADA compliant ADUs (Note: The State's maximum allowable size for a detached ADU is 1,200 sq. ft.) Lot Coverage As of January 1, 2020, State law dictates that cities cannot impose lot coverage, floor area, or open space standards, which would prohibit development of an 800 sq. ft. ADU (attached or detached). However, cities could choose to implement a lot coverage requirement for ADUs larger than 800 sq. ft. Currently, Page 7 of 10 City of Redwood City 1017 Middlefield Road, Redwood City, CA. 94063 Tel: 650-780-7000 www.redwoodcity.ore