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City Council Staff Report 6/2/2025 — Discussion Item — Detached Accessory Dwelling Units Page 2 • Utilities o Blaine and New Brighton require ADUs to be connected to the same lines as the primary residence/house. ■ This is consistent with the current Mounds View requirements. o Fridley requires separate water and sewer lines, unless a connection is 'impractical.' • Foundation o All three require permanent foundation. Fridley specifies that the foundation is to be frost -protected. • Parking o Blaine requires three off-street parking spaces for properties with an ADU. o New Brighton requires one off-street parking space on 'an improved surface' that meets City Code requirements. ■ Mounds View requirements vary based on whether the unit is internal or external/attached. • Size requirements o Blaine requires different sizes per zoning district for detached ADUs. ■ Maximum size of 50% of the finished square footage of the primary residence/house, 25% of the square footage of the rear yard, or 960 square feet, whichever is less. ■ Maximum size of 50% of the finished square footage of the primary residence, 25% of the square footage of the rear yard, or 1,200 square feet, whichever is less. o Fridley limits detached ADUs to no more than 50% of the finished SF of the primary residence/house. ■ All ADUs are to be a minimum size of 250 SF. o New Brighton limits ADUs to be no larger than the primary residence/house. ■ Detached ADUs are limited to the floor area of the primary residence/house, or 1,064 SF, whichever is greater. o Current Mounds View requirements are that ADUs are to have a minimum gross floor area of 300 SF. ■ Internal ADUs cannot exceed the area of the floor above or below said unit. ■ Attached ADUs cannot exceed 800 SF in gross floor area. Building requirements o All three require ADUs to be 'architecturally compatible' with the primary residence. ■ This is required in Mounds View as well. o Blaine limits ADUs to two bedrooms. o Fridley requires exterior balconies and decks above a ground floor to not face the side or rear yard of neighboring residential properties. Location requirements o Blaine permits detached ADUs in rear yards only, and prohibits properties from having a detached ADU in addition to another detached accessory structure such as a garage. o Fridley requires detached ADUs be 10' from side or rear lot lines; if rear lot line abuts an alley the setback can be reduced. o New Brighton requires detached ADUs to be in the side or rear yard, unless otherwise approved via a Special Use Permit. The Mounds View Vision A Thriving Desirable Community