If your new Philadelphia apartment feels tighter than it should for the price, you're not imagining it. New RentCafe data shows apartments built in the city over the past decade average just 747 square feet, and the report also examines units currently under construction.
According to 6abc Philadelphia, RentCafe ranked Philadelphia 12th out of 100 U.S. cities for having the smallest new apartments, with new local units running 163 square feet smaller than the national average. Studios, one-bedrooms, and two-bedrooms in Philadelphia have each shrunk by roughly 100 square feet compared with the previous decade, the station reported. Meanwhile, apartments now under construction in the city are also covered in the report, alongside the 747-square-foot average for units completed over the past decade, according to RentCafe data reported by The Philadelphia Inquirer.
Single-Person Households Are Driving the Squeeze
The shrinkage isn't accidental. Platform analysts identified high demand for single-person housing as a cause behind the smaller footprints, per RentCafe. In high-demand rental markets like Philadelphia, developers may prioritize studios and one-bedrooms to increase the number of units in a building and accommodate single-person households.
That strategy comes at a cost for larger households. RentCafe data reported by the Inquirer showed that while newly built three-bedroom units in Philadelphia actually grew by 93 square feet compared with the previous decade, they represented only 3% of the city's total supply of new apartments built between 2016 and 2025. Family-sized units, in other words, are getting bigger but remain vanishingly rare in the current construction pipeline.
Rents Keep Climbing While Square Footage Falls
The figures also include rent data. As of August 2026, RentCafe market data showed the average Philadelphia apartment rent had reached $2,036 per month, a 1.99% annual increase, with studio apartments averaging 460 square feet for $1,488 and two-bedroom units averaging 987 square feet for $2,350 per month.
Philadelphia's downsizing trend also runs counter to what's happening nationally. Nationwide average new apartment sizes actually expanded to 910 square feet in 2025, breaking a decade-long national trend of shrinking units, according to RentCafe, with growth largely driven by expanded layouts in Southern U.S. markets. Philadelphia's local trajectory has moved in the opposite direction.
Construction Has Concentrated — and Slowed
Philadelphia's recent apartment growth includes compact, high-density studios and one-bedrooms.
At the same time, the overall pace of new construction has cooled. Multifamily development in Greater Philadelphia slowed in 2025 and early 2026, with first-quarter 2026 deliveries dropping to their lowest level in several years, per Northmarq. Urban-core projects were among the Philadelphia deliveries expected in 2026.
Public housing officials have acquired existing private developments. The acquisitions involve existing properties rather than new ground-up construction.
A Reversal of Decades of Growth
The shift highlights a contrast with earlier construction periods. A historical discussion of Philadelphia apartment sizes on Philly Apt Rentals compares apartment sizes across several Philadelphia construction periods. Recent construction has produced smaller units than the previous decade.
Philadelphia's apartment-size data can be considered separately from trends in other markets. Elsewhere, Hoodline has tracked similar shrinkage in Cincinnati and other cities where rising rents and shrinking floor plans have moved together, though the pace and scale of the trend vary by market.
