Philadelphia's Zillow ZHVI typical home value is $237,459, while ZORI typical observed market rent is $1,814 monthly. Together they imply a 9.2% gross yield before operating costs, vacancy, financing and taxes. The value is 3.8x ACS median household income, while annualized ZORI is 35.1% of that income. These citywide affordability gauges frame acquisition and tenant-budget pressure but not a buyer's loan terms or a household's ability to pay.
The city has 748,270 housing units; 9.2% are vacant, and renters occupy 48.2% of occupied units. The ACS median year built is 1949, making physical due diligence important without proving condition. ACS reports a $243,100 median home value among surveyed occupied housing and $1,397 median gross rent, which includes contract rent plus selected utilities. These measures cover different housing and periods than Zillow's series, so the differences are not appreciation, a discount or a blended valuation.
Direct city depth is mixed: 52.3% of renter households are rent-burdened, while single-family structures are 64.1% of all units and large multifamily structures are 15.1%. Among vacant units, 27.5% are for rent; ACS also separates sale and seasonal vacancies, but these reason categories measure neither investable inventory nor leasing speed. Population changed by 0.04% between overlapping ACS vintages, a comparison that is not annualized and may reflect boundary changes. Median household income is $61,953, with poverty at 21.4% and unemployment at 8.1%; these are descriptive demand constraints, not causes of rent outcomes.
In Philadelphia County, listings showed a 51-day median market time, 18.2% had price reductions, and investor purchasers represented 17.2%, indicating potential negotiating room and investor participation without establishing city or property performance. In the broader Philadelphia metro, payroll jobs grew 0.32% and 14,314 housing permits were recorded over the supplied reporting periods; neither measure identifies demand or new supply inside the city. Nationally, Freddie Mac's thirty-year mortgage rate was 6.58%, a financing benchmark rather than a Philadelphia borrower quote.
The central limitation is that citywide Zillow typicals and ACS aggregates cannot establish a property's achievable rent, operating expenses, renovation needs, collection performance or net yield. Underwriting should verify parcel taxes; insurance pricing and hazard exclusions; title, code and permit status; inspection findings and near-term capital work; unit-level rent comparables, concessions and lease terms; utility responsibility; and realistic collection and vacancy assumptions. Obtain lender quotes, then stress debt service and exit costs against a property-specific income statement rather than relying on the headline gross yield.