City staff propose NC1 neighborhood overlay and a new height/density framework; commissioners debate trade-offs

City staff presented two interlocking planning proposals designed to reduce uncertainty around downtown growth while shielding nearby residential neighborhoods from commercial encroachment.

‘‘This NC1 overlay is our response. It does three things. It strictly prohibits mixeduse expansion into the residential core. It mandates architectural cohesion ... and mandates the maintenance of our mature ... tree canopies,’’ Assistant City Administrator Nathan Woods said, summarizing the proposed Neighborhood Protection Overlay (NC1) that applies to the Cold Water Springs and Sloan Poe neighborhoods.

Why it matters: Staff argued the overlay gives residents a voice and predictable standards for new builds and accessory dwelling units (ADUs) in vulnerable neighborhoods. Commissioners worried those same restrictions could raise construction costs, reduce housing supply and therefore worsen affordability.

Overlay elements and enforcement: Woods said NC1 would require approval by the city’s board of architectural review for all new construction and ADUs within the overlay, require city site management plans during construction (the same level of oversight used for commercial builds), regulate lot frontage by comparing adjacent lots, and require sidewalks and tree-planting standards intended to preserve canopy over time.

Scope and outreach: Staff displayed an overlay map and said they estimate roughly 26 opportunities for new construction across the two neighborhoods (excluding tear-down/rebuild scenarios and parcels already zoned multifamily). Woods said staff plan a public hearing in February and broad mailings to affected property owners.

Zoning, height and the path forward: In a companion presentation, staff walked commissioners through the history of downtown height policies and described a proposed citywide rewrite to reduce ad hoc plan-development (PD) approvals. The staff proposal would codify corridor-based story caps — for example, two stories on some College Avenue frontage, three stories on adjacent corridors and identified places allowing five stories, with a limited set of sites allowed seven stories under strict conditions.

To obtain additional stories beyond the base cap, staff suggested a development-bonus model in which developers make contributions to a community development fund. As one example staff used in the discussion, a bonus could be calculated at $10 per square foot of bonus area to fund downtown streetscape, public amenities and other negotiated requirements.

Commissioner reaction and unresolved questions: Commissioners generally welcomed an effort to replace uncertainty with a clear code, but they raised practical concerns: whether story-based limits or a density-per-acre standard would better handle topography and irregular lots; whether a contribution rate should be higher than $10 per sq ft; and whether the overlay and height rules would unintentionally push development outside city limits or reduce supply, worsening affordability. Commissioner Rice warned the overlay could add $100,000–$200,000 to the price of a new build and said staff should weigh affordability impacts carefully.

Next steps: Staff said they will finalize NC1 ordinance language, mail notices to affected owners, hold a public hearing in February, and proceed to a zoning-code rewrite in 2026 to implement corridor-based heights, stepbacks and by-right entitlements tied to the development-bonus framework.

The planning commission took no formal vote on the overlay or height framework at this workshop; staff asked the commission for feedback as staff prepares ordinance text for public hearings.