The industrial market in the Philadelphia region is beginning to shift as sublease space continues to rise. While overall availability has only dipped slightly, a growing share of available space is now being marketed by tenants rather than landlords.
In recent conversations with tenants and landlords across the Philadelphia region, we are seeing a similar trend. According to CoStar Analytics, industrial sublease space now represents about 7.9 percent of all available industrial inventory, a multi decade high. Of the roughly 65.5 million square feet currently available, approximately 5.2 million square feet is being offered for sublease.
Much of this stems from the industrial leasing surge in 2021, when companies rushed to secure warehouse space amid supply chain disruptions and strong e commerce demand. Many tenants leased more space than they ultimately needed.
As conditions normalize, some companies are now marketing excess space for sublease. Much of the current sublease inventory is under 250,000 square feet, suggesting smaller operators are driving much of the pullback.
While rising sublease space can create opportunities for tenants to secure discounted rents, it may also add competition for landlords in certain submarkets. Overall, the trend appears to reflect a market recalibrating after several years of unusually strong industrial leasing.
M.S. Fox Real Estate Group is currently marketing a 10,573 square foot flex sublease opportunity in Norristown, Pennsylvania, which is a good example of the type of versatile industrial space that is beginning to appear in the market
Source: CoStar Analytics, March 2026.

















