Island County poses a tension between modest income yield, soft visible listings, and earthquake exposure. Underwriters focused on rent-supported carrying capacity should investigate; those needing clear resale liquidity or known hazard costs should be cautious. Zillow’s 2026-06 county home-value measure rose 0.56% year over year; FHFA’s 2025 repeat-transaction HPI rose 2.21%. Their vintages and methods differ, so the HPI may corroborate direction but cannot be averaged with Zillow.
Zillow reported a $647,157 median home value and $2,052 monthly median asking rent in that observation, with a supplied 3.80% gross yield before costs. This is measured asking rent, not an assumed lease result. The 0.67% effective property-tax rate is a carrying-cost input; parcel assessment, insurance, financing, and operating costs are not published, preventing net-yield calculation. HUD’s two-bedroom FMR is a payment standard, not an asking-rent estimate, and cannot replace market rent.
Realtor.com’s MLS listing-market evidence shows median listing price down 3.27% year over year and a 20.89% price-reduced share. Asking prices, visible supply, and concessions indicate negotiation risk, not closed-sale pricing or buyer demand. QCEW’s 2025 annual average has 18,166 covered workplace jobs, down 0.57%; it is neither resident employment nor unemployment. Trade, transportation, and utilities is the largest disclosed private supersector, not the whole economy. Net migration was positive and arriving movers had higher average AGI; investors represented 5.90% of 1,051 purchase mortgages. Neither proves tenant demand or buyer competition.
The modeled annual climate loss ratio is 0.15% of building value, consistent with earthquake as the named dominant hazard, but it is a county model rather than a site loss estimate or insurance quote. Missing closed-sale comparables, vacancy, lease collections, parcel condition, seismic features, insurance availability and premiums, debt terms, and property-specific taxes prevent verified exit-price, net-income, and operating-resilience conclusions.