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Planning commission recommends detached ADU code changes, removes lot-coverage clause
Summary
The commission recommended approval of detached ADU code amendments for Alpine, including a 1,200-sq-ft living-area cap, annual ADU registration and a 90-day rental minimum for internal ADUs — and voted to remove a proposed aggregate lot-coverage limit (item 4) after debate about administrability; the motion passed 4–2.
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The Alpine City Planning Commission on Sept. 1 voted to recommend approval of proposed text amendments to the city’s ADU rules, with one substantive change: the commission directed staff to remove a proposed aggregate lot-coverage limit (item 4) from the draft before the item goes to city council.
A commissioner moved to recommend approval ‘‘with the following change. We recommend removing item 4, addressing maximum lot coverage because it is not a meaningful measure in any circumstance after the maximum size of the ADU has been changed to be 1,200 maximum living square feet.’’ The motion was seconded and — after a roll-call vote — passed 4–2. In the roll call the commission recorded votes in favor from Troy Slade, John McKay, Jeff Davis and Greg Butterfield; Michelle Schurmer and Susan (Suze) Wittenberg voted no. (Motion text and vote recorded in meeting minutes.)
Staff had presented the draft code language aligning local ADU rules with state requirements. Key provisions in the recommended text include: a definition distinction between detached and internal ADUs; a 1,200-square-foot maximum living-area cap for detached ADUs; a 300-square-foot minimum; an owner-occupancy requirement; an annual ADU registration and rental-license renewal tied to state moderate-income reporting; and a restriction that internal ADUs cannot be rented for periods shorter than 90 consecutive days. Commissioners debated whether to regulate by footprint or living area and expressed concern that a lot-coverage test tied to every permanent structure on a lot would create an administrative burden for staff.
Commission discussion also covered utilities and fees: staff said state code generally prohibits impact fees for internal ADUs but that detached ADUs may trigger district (TSSD) charges for separate sewer or water hookups; the commission asked staff to verify which fees apply and whether the city should adjust its fee schedule. Staff will forward relevant state code citations and district guidance to the commission as the item moves to council.
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