Flagstaff Development Code Update & Impact Modeling
Flagstaff, AZ · 2023–2026
Client: City of Flagstaff
Location: Flagstaff, AZ
Year: 2023–2026
CP Role: Subconsultant to DOWL
Practice Area: Zoning + Code Reform
Team: Jamin Kimmell, Principal-in-Charge; Rachel Cotton, Project Manager; Alex Steinberger; Pauline Ruegg
The Challenge
Flagstaff's leaders wanted more affordable housing and a carbon-neutral city, and the City's own development rules could stand in the way of both. City staff needed each barrier weighed for cost, emissions, and displacement risk, within the limits of Arizona law.
Our Approach
We audited six sets of development rules, from the zoning code to the fire code, and modeled housing prototypes in 3D with pro formas to see which rules made projects infeasible. We then tested each change on its own and modeled citywide feasibility, greenhouse gas emissions, and displacement risk, so every recommendation came with its projected effect. Our calibrated model from the Flagstaff Regional Plan let us move quickly from research to analysis.
Outcome
In mid-2026 we presented recommendations to City Council: higher base densities, lower multifamily parking minimums, a sustainable design baseline, and three tiers of affordability and sustainability incentives. Council directed staff to move them forward, and staff are now drafting the code amendments.
