St. Louis County has an income-case-versus-exit-liquidity tension. In Zillow’s 2026-06 county observation, the median home value was $293,458 and median asking rent was $1,477 per month, producing a published 6.04% gross yield before costs. That combination warrants investigation by owners able to test block-level rents, taxes and insurance; buyers relying on quick resale or broad county averages should be cautious, because listing conditions point to a softer visible sales market.
Zillow reports 2.24% year-over-year home-value growth at its labeled vintage. FHFA’s annual 2025 repeat-transaction HPI rose 3.76%, an appreciation index rather than a home value; its distinct method and vintage mean it cannot be averaged with Zillow. HUD’s two-bedroom FMR is a payment standard, not asking rent and not an input to substitute for published gross yield. The 1.21% effective property-tax rate belongs in carrying-cost review; net yield cannot be established because expenses, vacancy and financing terms are not published.
Realtor.com’s MLS listing market, labeled 2026-06, showed 2,194 active listings, up 18.92% year over year, while median listing price was down 9.91%. Longer marketing time and the price-reduced share reinforce seller-concession evidence, but asking prices, active supply and days on market are not closed sales or proof of buyer demand. Tax-return migration was net outflow and inbound movers had lower average income than outbound movers. In 2025 QCEW, county workplace covered employment declined, even as the covered-worker average weekly wage rose; education and health services was the largest disclosed private supersector, not a portrait of the whole economy. Investor mortgages were 16.78% of reported purchase mortgages, so competition may vary materially by property type and neighborhood.
Inland flood is the dominant hazard, and the modeled expected annual building-value loss ratio is 0.16%; it is a county-level model rather than a property loss estimate. Address-level flood zone, elevation, drainage, insurance quotes and prior claims are therefore essential. Missing sale comparables, submarket vacancy, lease terms, operating expenses, property condition and financing prevent underwriting net income, resale execution and asset-specific climate exposure. County evidence also cannot show whether investor buyers target the same homes as renters or owner-occupants.