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8.A. - Page 9 of 32 restrictions on this type of housing. While the Planning Commission approved the resolution, it asked staff to study the following prior to the City Council hearing: 1. Implement a sliding scale to allow proportional increases in square footage for second story ADUs above garages. 2. Allow additional square footage for second story ADUs above detached garages through a public hearing or additional findings. 3. Explore the City of Belmont's ADU regulations and consider adopting code amendments to allow varying height maximums in association with roof form and/or distance from property lines, require fagade compatibility with the main home, and require the architectural style to be compatible with the main home. 4. Lot coverage exemption for detached one-story ADUs. 5. Allow ADUs to be exempt from the City's half -story height requirements. Sliding Scale A sliding scale could allow a proportional increase in floor area above a detached garage when tied to another independent variable, for example, lot size, distance from property lines, or height of structure. Establishing a connection between ADU square footage and its impact to neighboring properties can be inexact. A sliding scale would be difficult to implement without further study and analysis of any established practices in other jurisdictions. Square Footage Exemption, Public Hearings and Findings A public hearing process and additional findings to justify an increase of square footage above a maximum amount over a detached garage would be possible. The findings would have to be adjudicated by the Zoning Administrator or Planning Commission. A public hearing process would require additional administrative resources and may not be the most efficient use of these functions; however, it would allow for more intensive public notice and review. Establishing findings based on subjective criteria could result in additional appeals. Study the City of Belmont's ADU regulations The City of Belmont allows detached two-story ADU height maximums based on setbacks and roof form. ADUs are allowed a height of 17ft. for a flat roof, 22 ft. for a pitched roof when set back less than 5 ft. from the property line, and 20 ft. and 24 ft. respectively for structures that meet the setback requirements for the main home. All structures above 18 ft. tall are required to comply with residential design guidelines. Additionally, Belmont's ADU regulations require the ADU to match the exterior fagade materials and architectural style of the new home. Redwood City's ADU ordinance already includes architectural standards (Section 37.3.F) which require the ADU to be architecturally compatible with the architectural style and exterior paint and materials of the main home. The Planning Commission's recommended height restrictions could affect ADU architectural styles and may not allow for the ADU to match the main home. The requirement for matching fagade materials and architectural styles could be addressed through the upcoming residential design guideline effort. 10] City of Redwood City 1017 Middlefield Road, Redwood City, CA. 94063 Tel: 650-780-7000 www.redwoodcity.ore 242