Planning commission debates 14-story cap, parking and pedestrian streets in form-based code; asks staff for 3-D visuals and wider review

The South Burlington Planning Commission spent the meeting’s longest session discussing proposed form‑based code height limits, street-role designations and related development standards. Commissioners and staff debated a proposed 14‑story maximum in the T5 (Market Street) zone, a 150‑foot height cap, incentives for affordable housing, parking maximums, unit-mix considerations, site‑amenity rules and measures to reduce the visual massing of taller buildings.

Commissioners heard that the 14‑story upper bound was chosen after benchmarking comparable cities where taller buildings felt visually imposing; staff described 14 as “mid‑rise” that would allow significant new housing while attempting to limit abrupt skyline changes. Commissioners and several members of the public asked for three‑dimensional massing visualizations and street‑level views before committing to a definitive height cap. Paul, a city planning staff member, presented an initial SketchUp massing exercise during the meeting and cautioned it was an early draft: “So please take the caveat that, this is a very first cut.”

Concerns and topics raised during the discussion included: • Height and bonuses. Staff presented a model in which base height limits (examples discussed: 12–14 stories in T5, lower in T4) could be increased by one or more stories when a project met affordable‑housing bonuses. Commissioners debated whether the base should be reduced one story to keep the maximum with bonuses lower. No binding change was adopted during the meeting. • Visual massing and setbacks. Commissioners repeatedly urged rules to reduce monolithic façades as building height increases—stepbacks, narrower tower profiles above podiums, repeated stepbacks at higher levels and varied rooflines were discussed as methods to lessen visual impact and preserve sunlight access. • Parking maximums and unit mix. Commissioners and others proposed changes to parking rules and unit composition. One commissioner suggested a residential parking standard of 1.5 spaces per studio/one‑bedroom and 2 spaces for two‑bedroom (and larger) units to better match observed use patterns. The commission also debated whether the code should encourage a mix of apartment sizes (studios through four‑bedrooms) within large developments or rely on market forces and building‑type variety across blocks. • Site amenities and civic space. Commissioners raised concerns that developers might satisfy required outdoor amenity area with semi‑private balconies or indoor spaces. Staff confirmed the draft allows up to 50% of a site‑amenity requirement to be satisfied with certain amenity types, and commissioners asked for clearer limits so publicly accessible outdoor space is not wholly replaced by private indoor amenities. • Street hierarchy and pedestrian connections. Staff proposed a role‑based hierarchy (primary/secondary/tertiary) separated from street cross‑section types. The draft also shows pedestrian corridors and proposes shared‑use paths; commissioners pushed for design guidance that would slow vehicle speeds on tertiary streets and allow temporary pedestrianization or street closures for events.

Several commissioners said they would be comfortable with a higher cap provided the code required stronger massing controls and design standards; others said they wanted lower base heights or wanted to see realistic visualizations. Commissioner Jessica said, “I'm still not convinced that that's the right number,” and asked for before/after street‑level renderings and local comparisons.

Staff proposed a five‑week external review period for the draft that would include internal departments (including fire and public works) and major developers, and staff committed to producing more detailed 3‑D massing visualizations and street‑level graphics for the commission and public. No formal motion or vote to change height limits occurred; the topic will return after the visual materials and departmental feedback are prepared.