St. Johns County, FL

St. Johns County presents a price-and-income tension for income-focused buyers to investigate and leverage-sensitive buyers to treat cautiously. Zillow’s county median home value is $492,885, down 2.71%, while median asking rent is $2,116 and the reported gross yield is 5.15% before costs. This pairing supports an initial income screen, but the record lacks debt terms, insurance, repairs, vacancy and management costs needed to test cash flow.

Measured market rent, not HUD’s two-bedroom Fair Market Rent, supports the reported yield; FMR is a payment standard rather than an estimate of asking rent and should not replace market rent in underwriting. The effective property-tax rate is 0.76%, adding a known carrying-cost component but not a full expense load. Zillow’s value decline and FHFA’s annual 2025 repeat-transaction HPI increase of 1.78% are different methods and vintages; they cannot be averaged into a single appreciation conclusion.

Realtor.com provides MLS listing-market evidence, not closed-sale evidence: 2,347 active listings show visible supply and 22.31% of listings had price reductions, a seller-concession signal rather than proof of buyer demand. Net migration was 4,074 tax-return households, with average incoming AGI of $130,514 versus $97,953 for outgoing movers; this is supportive household-flow context, not evidence that movers will rent or buy locally. Investors accounted for 571 of 7,172 purchases, or 7.96%, indicating participation without showing their property type, financing or rental performance. QCEW identifies Leisure and hospitality as the largest disclosed private supersector, but it measures annual covered jobs at county workplaces, not resident employment or the whole economy.

Inland flood is the dominant hazard, and modeled annual climate loss equals 0.17% of building value. That modeled ratio does not identify parcel flood exposure, insurance availability, deductibles or mitigation costs. Next checks are property-specific flood and elevation records, insurance quotes, lease and operating statements, closed-sale comparables, and submarket rent comps; without them, an underwriter cannot establish net yield, verify transaction liquidity or determine whether flood risk is reflected in price.