Chicago city accounted for 62.2% of the metro’s annual inventory decline. Original analysis separates the city from the rest of the nine-county area.
Evidence: August 2025 versus August 2026.
A regional inventory decline can be concentrated in one part of the region. August's Illinois REALTORS reports show that Chicago city accounted for approximately 62.2% of the nine-county metro's year-over-year inventory reduction, despite holding only 29.3% of the metro's inventory a year earlier.
That is an accounting finding, not a claim that the city caused the regional change. It identifies where the reported decline was concentrated.
The city report lists inventory falling from 4,616 to 3,541, a reduction of 1,075 homes. The metro report lists inventory falling from 15,756 to 14,028, a reduction of 1,728. Dividing the city's reduction by the regional reduction produces 62.2%.
The market outside the city changed less sharply
Subtracting Chicago city from the same publisher's metro totals produces a useful comparison for the rest of the nine-county area.
| Geography | August 2025 inventory | August 2026 inventory | Change |
|---|---|---|---|
| Chicago city | 4,616 | 3,541 | -23.3% |
| Metro excluding Chicago city, calculated | 11,140 | 10,487 | -5.9% |
| Full nine-county metro | 15,756 | 14,028 | -11.0% |
The calculation assumes the city is consistently included within the metro counts. Both reports come from Illinois REALTORS, use the same month and present the same inventory measure. The residual is a broad geographic grouping, not a statement about every suburb.
Why the distinction matters
Someone using only the regional percentage could miss how differently the available-inventory count changed inside and outside the city. The combined total blends areas with different property mixes and market conditions.
The comparison does not tell us why inventory fell. Fewer new listings, completed transactions, withdrawals and other status changes can all affect the available pool. The two reports do not supply the listing-level histories needed to assign those causes.
A reduction in inventory also does not automatically establish stronger demand. Sales are a separate flow. Pricing, financing and the match between available homes and buyers' requirements can affect both measures.
For a buyer, the finding supports checking current options within the actual search area instead of assuming the metro headline describes the available choices. For a seller, it supports measuring the competition that prospective buyers will see.
Do not subtract the price medians
Counts can be subtracted when the populations are nested and definitions match. Medians cannot be used that way. Subtracting the city median price from the metro median price would not reveal a suburban median.
The same distinction applies when moving from a city total to neighborhoods. A sound local comparison requires the underlying category data, not arithmetic on summary medians.
Explaining how the inventory difference developed would require tracking listings through entry, contract, closing and withdrawal within consistent city and non-city boundaries. The current evidence already establishes the narrower finding: the region's inventory contraction was disproportionately concentrated inside Chicago city.
Sources: Illinois REALTORS City of Chicago August 2026 report and Chicago Metro August 2026 report, both current as of September 8. Metro counties: Cook, DeKalb, DuPage, Grundy, Kane, Kendall, Lake, McHenry and Will. All residuals and concentration measures are original calculations.