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Office Deep Dive: Philadelphia ranks 12th nationally in big-block office availability

The local region offers one-third the inventory of leading markets
CoStar Analytics
October 31, 2025 | 7:46 P.M.

As the nation's ninth-largest office market, Philadelphia ranks 12th out of 15 major metropolitan markets for big-block office availability. The local market currently lists 62 spaces exceeding 100,000 square feet in four- and five-star buildings — enough to offer options for large companies, but still far behind the top-performing cities.

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