{"@context":{"@vocab":"https://schema.org/"},"@type":"Dataset","@id":"https://api.ai-analytics.org/building-permits/17-199#permits","name":"Building Permits — Williamson County, IL","description":"Census Building Permits Survey for Williamson County, IL: 141 housing units authorized in 2025 ($21,107,527 valuation), by structure type, 2015-2025.","spatialCoverage":"Williamson County, IL","isAccessibleForFree":true,"license":"https://creativecommons.org/publicdomain/zero/1.0/","place_id":"17-199","county":{"county_id":7594154890884967000,"state_fips":"17","county_fips":"199","place_id":"17-199","county_geoid":"17199","county_name":"Williamson County","state_abbr":"IL","year_min":2015,"year_max":2025,"latest_units1":68,"latest_units2":6,"latest_units34":59,"latest_units5p":8,"latest_total_units":141,"latest_total_value_usd":21107527,"trend":"[{\"year\": 2015, \"total_units\": 99, \"total_value_usd\": 12077206}, {\"year\": 2016, \"total_units\": 113, \"total_value_usd\": 15910018}, {\"year\": 2017, \"total_units\": 118, \"total_value_usd\": 15141758}, {\"year\": 2018, \"total_units\": 229, \"total_value_usd\": 28193230}, {\"year\": 2019, \"total_units\": 178, \"total_value_usd\": 24277940}, {\"year\": 2020, \"total_units\": 178, \"total_value_usd\": 24046983}, {\"year\": 2021, \"total_units\": 93, \"total_value_usd\": 15795760}, {\"year\": 2022, \"total_units\": 146, \"total_value_usd\": 16734118}, {\"year\": 2023, \"total_units\": 129, \"total_value_usd\": 22333553}, {\"year\": 2024, \"total_units\": 138, \"total_value_usd\": 19411316}, {\"year\": 2025, \"total_units\": 141, \"total_value_usd\": 21107527}]","ingested_at":"2026-06-26T15:41:42Z"},"trend":[{"year":2015,"total_units":99,"total_value_usd":12077206},{"year":2016,"total_units":113,"total_value_usd":15910018},{"year":2017,"total_units":118,"total_value_usd":15141758},{"year":2018,"total_units":229,"total_value_usd":28193230},{"year":2019,"total_units":178,"total_value_usd":24277940},{"year":2020,"total_units":178,"total_value_usd":24046983},{"year":2021,"total_units":93,"total_value_usd":15795760},{"year":2022,"total_units":146,"total_value_usd":16734118},{"year":2023,"total_units":129,"total_value_usd":22333553},{"year":2024,"total_units":138,"total_value_usd":19411316},{"year":2025,"total_units":141,"total_value_usd":21107527}],"_source":{"data_provider":"AI Analytics","data_provider_url":"https://api.ai-analytics.org","license":"https://creativecommons.org/publicdomain/zero/1.0/","primary_source":"https://www.census.gov/construction/bps/","primary_source_dataset":"Census Building Permits Survey — County annual (co{YYYY}a)","generated_at":"2026-06-29T11:21:57.946Z"}}