Fairfax County presents a pricing-to-income tension: Zillow’s county median home value is $779,439 while a published market asking-rent series supports only a 3.91% gross yield before costs. Buyers relying on near-term cash flow should be cautious; investors willing to test property-level rent durability and expenses should investigate. Both Zillow price and rent observations declined year over year, so the record does not show a current income tailwind.
The market asking rent is $2,542 per month. HUD Fair Market Rent is a payment standard, not an estimate of asking rent, and should not replace the measured market-rent input. FHFA’s annual repeat-transaction HPI gained 2.1%; it is an appreciation index rather than a home value and cannot be merged with Zillow’s differently dated direction into one growth rate. The 1.01% effective property-tax rate and $7,368 median annual tax make the pre-cost yield more sensitive to carrying costs.
Realtor.com’s MLS evidence shows visible supply rose 12.1% year over year and 14.69% of listings had price reductions. These are supply and seller-concession indicators, not closed-sale prices or proof of buyer demand. Net tax-return migration was negative 4,764, while departing movers reported average income $7,022 above arrivals. Investors made 670 of 10,966 mortgage purchases, a calculated 6.11% share, so their participation is measurable but does not establish exit liquidity. QCEW annual covered workplace employment declined 0.32%; Professional and business services accounted for 40.86% of private covered jobs, describing workplace concentration rather than resident employment.
Inland flood is the stated dominant hazard. Modeled annual climate loss equals 0.09% of building value, which warrants pairing the county hazard signal with parcel-specific flood review but is not a property loss estimate. Missing flood-zone and elevation data, insurance quotes and deductibles, prior losses, condition, operating expenses, vacancy, debt terms, and closed-sale comparables prevent a parcel-level flood-cost, net-cash-flow, or acquisition-value conclusion.