Seattle Mayor Issues Executive Directive Guaranteeing 45-Day Permitting for Infill Modular Housing

SEATTLE, WA — Seattle Mayor Wilson issued Executive Directive 2026-04, instructing the Seattle Department of Construction and Inspections (SDCI) to implement a fast-track 45-day approval window for prefabricated modular and mass-timber housing projects.

Cutting Bureaucracy for Affordable Density

The executive order creates a catalog of pre-reviewed architectural plans for 4-to-6 story residential developments, exempting qualifying workforce housing builds from discretionary design review board hearings. Mayor Wilson stated that administrative delays add up to $30,000 per unit in financing carrying costs, slowing private and non-profit housing production.

Mayor Wilson emphasized that Seattle must deploy every regulatory tool to rapidly expand housing inventory near Sound Transit light rail corridors.

Neighborhood Feedback and Builder Response

Non-profit housing developers and building trade unions commended the permitting certainty, while neighborhood historical preservation groups advocated for maintaining community design review input in landmark zones.

SDCI has reallocated 15 dedicated plan examiners to staff the expedited housing desk.

Implementation Milestones

The pre-approved modular plan catalog goes live for developer applications on October 15, 2026.