Franklin’s decision frame starts with Zillow’s typical city home value of $928,567 and typical observed monthly market rent of $2,132. Annualizing that rent against that value gives a 2.76% city gross yield before every operating cost, vacancy allowance, capital expense and financing charge, so it is not a cap rate. The Zillow value is 7.77x ACS median household income, while annual Zillow rent is 21.4% of that income; these are broad city affordability screens, not household-specific tests.
ACS describes 36,239 city housing units, with a 6.2% citywide vacancy rate and renters occupying 36.2% of occupied units. Its $705,400 median home value and $1,923 median gross rent describe surveyed occupied housing; gross rent includes contract rent plus selected utilities. Zillow instead tracks a typical current city home value and typical observed market rent. The different measures and periods should remain separate, not be averaged or treated as conflicting appraisals.
Direct city depth is mixed. ACS reports a 47.1% rent-burden share, while single-family homes comprise 66.0% of housing units and large multifamily buildings 15.1%. Units listed as for rent account for 42.9% of vacant units, but neither that reason share nor overall vacancy proves a specific rental will lease quickly or represents purchasable inventory. Population is 87,133, up 11.8% between overlapping ACS vintages; this is not an annual rate and may reflect boundary changes. Median household income is $119,528, with poverty at 4.6% and unemployment at 2.2%. These city descriptors cannot establish tenant quality, rent durability or property condition.
At the county scope, Williamson County listings show a median 53 days on market and price reductions on 18.9% of active listings, useful county context for negotiation but not Franklin-specific liquidity. The broader Nashville metro reports 4.4 months of supply and price drops on 25.2% of sales listings, indicating metro resale choice without measuring the city. The national Freddie Mac 30-year mortgage rate is 6.58%, a national financing benchmark rather than any borrower’s quote. These scopes and denominators should not be blended.
Underwriting should therefore begin with the subject property, not the city gross yield. Verify achievable rent, purchase price, unit condition, comparable leases and sales, lease restrictions, title, permits and association rules. Build a property-specific budget for taxes, insurance, utilities, repairs, capital replacements, management, leasing costs, vacancy and financing; then stress-test turnover and rent concessions. Confirm hazard exposure and insurance terms at the parcel, and use actual lease and inspection evidence before judging cash flow.