Illinois building permits, one API call away.

Amalgament indexes 1,906,571 building permits for Illinois from 17 public sources, normalized into one schema and joined to the businesses and parcels behind them. Query them through one REST API and one MCP server, or scope any call to Illinois with a single parameter.

Coverage in Illinois

1,906,571 building permits from 17 public sources.

Most recent record dated 2026-08-20. The /freshness endpoint reports every source's last pull.

Sources

• Chicago, IL
• Cook County, Illinois

One call, scoped to IL

curl -H "X-API-Key: $OPENFOLIO_KEY" \
  "https://api.amalgament.com/search?q=roofing&dataset_type=building_permit&jurisdiction=IL"

Common questions

How many building permits does Amalgament have for Illinois?

1,906,571 building permits from 17 public sources in Illinois, normalized into one schema and queryable in a single API call or MCP tool call.

Can I filter Amalgament to just Illinois?

Yes. Pass jurisdiction=IL to the /search endpoint, or ask your MCP-connected agent for Illinois, and results are scoped to Illinois building permits.

All Building Permits · New York · Texas · New Jersey · California · Washington · Ohio · Missouri · Virginia