Select a date range and click Load Permits to
explore.
⚠ Rough estimates only. Units parsed via regex from
permit descriptions — not manually audited. Excludes revisions,
foundation-only, and sub-permits. Permits >1,000 units capped to 0.
Deduped by PIN. For accurate, human-audited data see
Chicago Cityscape. These estimates captured 80–95% of the actual counts reported in
this 2025 article from Steven Vance. Source:
Chicago Data Portal.
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Load permits first, then switch here to see trends over time.