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Statistics were refreshed at 04/12/2021 23:58.
The map and spreadsheet shows building permits data from the City of Chicago Department of Buildings. Read more details about these Sources.
* Unit counts are interpreted from the permit description, and will exclude some permits that don't include the count in the description. Unit counts also exclude: townhouses, permits with descriptions that use words instead of numbers to count, and permits with misspelled words in the description. Single-unit houses are likely to be overcounted, while multi-unit buildings are likely to be undercounted.