Mercer County offers a credible gross-rent screen but a conflicted underwriting case. Zillow’s median home value is $453,317 and its median asking rent is $2,622 per month, implying a 6.94% gross yield before costs. This merits property-level investigation; leveraged or resale-dependent buyers should be cautious. Zillow’s -0.13% change is labeled 2026-06. FHFA’s repeat-transaction HPI reports +5.72% for 2025 and +67.53% cumulatively over five years, not annualized. It is an appreciation index, not a home value; the vintages and methods differ, so these measures should not be averaged.
Keep market rent separate from HUD: the two-bedroom FMR is $1,950, a payment standard rather than an asking-rent estimate. The gross yield is therefore pre-expense. Carrying costs are central: the effective property-tax rate is 2.36%. Insurance, vacancy, repairs, management, financing, capital expenditures, and unit-level lease terms are not published, preventing a net-yield or property-specific cash-flow conclusion. Price is nearly flat while asking rent rose, but that does not establish durable rent growth.
Realtor.com provides MLS listing evidence, not closed-sale evidence. Active listings rose 16.04% to 698; listing prices softened and marketing times lengthened. That shows visible supply, not buyer demand alone. Net migration was -1,739, with a -$7,553 average AGI gap because incoming movers reported less than outgoing movers. QCEW covered county jobs fell 1.08% while average weekly wage rose 4.31%. Education and health services is the largest disclosed private supersector; QCEW is workplace, not resident, employment or the full economy. The mix warrants tenant-demand diligence, not a metro assumption.
Inland flood is the dominant hazard; the modeled climate loss ratio is 0.18% of building value per year. That is not a property-specific insurance quote or repair budget, so obtain flood-zone, elevation, claims, drainage, mitigation, and address-level hazard evidence. Investor purchases are a minority of total purchases, with a 14.98% share; the record does not show investor returns or dominance. Verify achieved rents, concessions, closed-sale comparables, parcel taxes, insurance, lease-up, turnover, and financing. Until then, the gross screen cannot become a net-return or resale thesis.