The latest Zillow Observed Rent Index for 60645 is $1,855, a ZIP-level typical observed asking-rent index blended across rental types rather than a quote for any particular available unit. Its matched Census ZCTA reports a $1,440 median gross rent in the ACS 2024 five-year survey. That 28.8% asking-index premium is a source-universe difference as well as a price difference: ACS describes occupied renter homes and includes selected utilities, while Zillow tracks asking rents. The ZIP label is also a Census ZCTA match, but a ZCTA is a statistical area and is not identical to a USPS delivery ZIP.
Rent history shows a continued upward path, although the recent pace is slower than the longer record. The one-year exact same-month annualized change was 5.1%, versus 6.4% over three years and 6.8% over five years. Thus, the latest movement confirms growth rather than breaking from it, but does not match the longer-run annual pace. Coverage was 100%, making the history complete for the supplied series. Monthly-return variability was 2.6% annualized, which supports somewhat greater confidence in the current index snapshot than a highly erratic series would; separately, the maximum drawdown was 2.0%, indicating a limited historical retreat. Transparent national discovery ranks among history-eligible ZIPs were 235 for momentum, 914 for stability, and 132 for the balanced measure, where lower ranks are stronger. These are backward-looking measurements, not forecasts or investment recommendations.
The bedroom ladder translates the ZIP index into modelled estimates, not measured bedroom rents. Scaling ZIP ZORI through the local HUD ladder produces estimates of $1,538 for a studio, $1,644 for one bedroom, $1,855 for two bedrooms, $2,393 for three bedrooms, and $2,768 for four bedrooms. The local HUD two-bedroom standard is $1,930, placing the modelled two-bedroom figure below that administrative benchmark. HUD FMR or SAFMR is bedroom-specific and useful for constructing the ladder, but it is an administrative standard rather than asking rent; neither the HUD figure nor these scaled estimates establishes the rent of a specific home.
A 30% required-income screen converts the current ZIP asking-rent index into $74,200 of annual household income. The ZCTA ACS median household income is $76,045, and the corresponding asking-rent-to-income calculation is 29.3%. This is arithmetic, not advice and not an applicant qualification rule; actual affordability depends on income, household composition, utilities, debts, lease terms, and unit rent. The ACS burden measure supplies a different lens: 48.9% of surveyed renter households, or 3,849 of 7,866, reported spending at least 30% of income on rent. That burden statistic is a five-year survey result for occupied renter homes and cannot prove the cost burden or availability of any individual unit.
The ZCTA’s housing-stock picture adds supply context without identifying a vacancy at any particular property. Of 18,437 housing units, 1,411 were vacant, for a 7.7% vacancy rate. The stock included 5,054 single-family units and 3,437 units in the large-multifamily category, showing that both structure types are represented in the survey inventory. There were 444 units classified as vacant for rent. That designation describes a survey category, not a count of comparable current listings, lease-ready homes, concessions, or units matching a given bedroom need. It therefore complements, rather than substitutes for, the Zillow asking-rent index and direct property-level listing checks.
Broader benchmarks put the ZIP’s asking-rent index below each named comparison: the City of Chicago context rent was $2,408.80, the Cook County context rent was $2,336, and the Chicago-Naperville-Elgin, IL-IN-WI metro context rent was $2,275. Those city, county, and metro figures are wider-geography context, not ZIP rental comps or evidence about a given building. The contrast can frame the ZIP’s position within those broader areas, but it cannot resolve why rents differ across locations or establish whether any specific ZIP listing is competitively priced. The direct ZIP index, ACS ZCTA survey, and HUD standard remain separate evidence universes.
Redfin’s direct rolling-three-month ZIP resale observation describes the for-sale market, not rental transactions. It recorded a $339,923 median sold price, up 3.0% year over year, with 101 homes sold and a median 45 days on market. Inventory stood at 103 homes and months of supply at 3.1. Sale-to-list evidence was firm in this resale universe: the average sale-to-list ratio was 101.0%, 44.9% of sales closed above list, and 56.8% went off market within two weeks. The annualized ZIP ZORI divided by median sold price produces a 6.5% cross-source screening ratio only; it is not a cap rate, net return, expected return, or property yield. Resale prices rose more slowly than the one-year rent index, yet the resale timing and sale-to-list signals show active for-sale liquidity, a tension that prevents either rent growth or resale evidence from standing alone.
The evidence has clear boundaries. Zillow does not provide unit-specific rent, ACS does not measure current asking rent, HUD does not measure market asking rent, and Redfin does not report rental transactions or property operating economics. Concrete property-level checks would include current comparable listings by bedroom count, lease start date, concessions, included and excluded utilities, fees, unit condition, square footage, and whether the advertised rent matches the lease terms. For a purchase-oriented comparison, sale date, property type, physical condition, list-to-sale history, and the distinction between active listings and completed sales also matter. These checks test how closely a particular property resembles the separate ZIP-level measurements rather than converting any one dataset into a conclusion about that property.