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Keystone Completes Office-to-Residential Conversion Project in Philadelphia

PHILADELPHIA — Local developer Keystone has completed an office-to-residential conversion project in Philadelphia’s Independence Mall district. Designed by Tantillo Architecture and built by Fasttrack

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Summary

PHILADELPHIA — Local developer Keystone has completed an office-to-residential conversion project in Philadelphia’s Independence Mall district.

Designed by Tantillo Architecture and built by Fasttrack Construction, the project transformed the historic, 12-story building at 400 Market St.

into a 176-unit apartment complex known as 400 Market Flats. Units come in studio, one- and two-bedroom floor plans, and amenities include coworking space and a rooftop terrace. Keystone developed the project, w

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