Philadelphia, the nation's ninth-largest office market with nearly 330 million square feet of total inventory, currently offers 62 big-block office spaces — contiguous areas of at least 100,000 square feet in premium four- and five-star properties.
CoStar Insight
Office Deep Dive: Half of Philadelphia’s big-block availability is across proposed projects
Market West and University City offer the region’s largest uninterrupted commercial spaces
CoStar Analytics
November 3, 2025 | 1:00 P.M.
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