Update · July 2026
Civexa now models every Seattle zone, code-exact
Civexa began with residential feasibility — middle housing under HB 1110. It now covers the entire City of Seattle Land Use Code: every zone family, with FAR, height, and allowed uses verified against the adopted chapters and tables rather than a summary of them.
What's now covered
- Residential — Neighborhood Residential and the Lowrise, Midrise, and Highrise ladder (SMC 23.44 / 23.45).
- Neighborhood Commercial & Commercial — the mixed-use corners (SMC 23.47A).
- Seattle Mixed — base FAR plus Chapter 23.58A bonuses (SMC 23.48).
- Downtown — incentive zoning, base-to-maximum FAR by height district (SMC 23.49).
- Industrial & Maritime — legacy IG1/IG2/IB and the 2023 MML/II/UI/IC zones (SMC 23.50 and 23.50A).
What "code-exact" means. For each zone, the FAR and height figures were checked line by line against the adopted code — including the height-district-specific FAR tables downtown and the 2023 industrial rezone. Where a value is verified it's shown as such; where it depends on an input we don't have, it's shown as a clearly labeled estimate or a verified range, never a fabricated number.
Why it matters
Most feasibility shortcuts lean on generic assumptions — a single FAR per zone, a rounded height. But downtown FAR varies by height district, and the industrial rezone assigns a different FAR to each mapped variant. Modeling those exactly is the difference between a screening number you can act on and one you have to re-check by hand.
What's next
The same verification is now extending across the Puget Sound region — King, Snohomish, and Pierce county cities — each built from that jurisdiction's own adopted code. Check back here for city-by-city updates.
See what's buildable on your lot
Run any Seattle address through Civexa — any zone, traced to code.
Run a feasibility report