Kendall County’s tension is a published gross-income screen versus carrying-cost and flood scrutiny. It suits investors who can verify parcel taxes, insurance and unit rent; buyers using county averages as property economics should be cautious. Zillow reports a $398,180 median home value, $2,392 monthly median asking rent and 7.21% gross yield before costs. This is measured market rent. HUD Fair Market Rent is a payment standard, not an asking-rent estimate, and cannot replace market rent in underwriting.
Gross yield is not net income: the effective property-tax rate is 2.37%, a carrying-cost input excluded from it. Zillow’s value measure rose 2.79% year over year, while FHFA’s annual repeat-transaction HPI rose 6.92%. FHFA is an index, not a home value. Because its method and supplied period differ from Zillow’s, it may confirm direction but cannot be averaged with Zillow into one appreciation rate. Realtor.com MLS evidence shows rising active inventory, 30-day median marketing time and an 11.97% price-reduced share—asking-market supply and seller concessions, not closed-sale prices or proof of demand.
Demand evidence is mixed. Net migration was positive by 543 tax-return households, yet incoming movers’ average AGI was $1,658 below that of outgoing movers; verify renter income and lease-up rather than assume affordability. The record reports 110 investor purchases among 2,051 total purchases, a 5.36% investor share. That is a limited measure of non-occupant participation, not buyer terms or behavior. Annual QCEW counted 30,836 covered jobs at county workplaces. Trade, transportation, and utilities was the largest disclosed private supersector, not the county’s whole economy. QCEW is workplace coverage, not resident employment, unemployment or a forecast.
Inland flood is dominant, with modeled annual climate loss of 0.13% of building value, not a property-level dollar estimate. County data cannot identify flood-zone status, deductible, insurance availability or prior loss. Missing closed-sale comps prevents an acquisition-value conclusion; missing vacancy, lease terms, utilities, maintenance, insurance and financing prevents net-cash-flow underwriting. Next checks are parcel flood records and quotes, tax assessment history, matched rent comps, and pending-to-closed outcomes. County aggregates also cannot establish target-asset condition or tenant profile.