645 Griswold St, Detroit, MI 48226
The Penobscot Building, a 47-story landmark in downtown Detroit (645 Griswold St, 48226), offers a unique opportunity for businesses seeking prestigious office space. Built in 1928, this iconic structure boasts 1,149,710 square feet across three buildings, situated on a 1.07-acre lot. Currently, 685,000 contiguous square feet are vacant, divisible into spaces as small as 1,500 square feet. The building features twelve high-speed elevators, a stunning four-story entrance archway, and meticulously preserved museum-quality decorations. Office suites range from small executive spaces to full floors (13,000 - 30,000 square feet), adaptable to both traditional and contemporary designs. Tenants benefit from on-site retail, restaurants, and convenient services, along with professional on-site management and maintenance. The Penobscot Building serves as a fiber-optic hub for the Detroit area, ensuring superior telecommunications. Security includes trained ambassadors and a sophisticated video monitoring system. Ample parking is available in nearby structures. The building's location in the heart of Detroit's revitalized business, cultural, sports, and entertainment districts provides unparalleled access and visibility. Zoned DDA Detroit in Wayne County, this property presents an exceptional full-service office environment with a rich history and a bright future.
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Dun-Rite Plumbing & Sewer Plumbing Service General Contractor
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Debra A Spicer PC Law Firm
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Comerica Bank Bank Loan Service
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Michael J. Kemnitz PC Law Firm
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Verasoft (Bike/Boat/Book/etc) Store Corporate Office
Cap rate
Implied · in-place · derived from last sale + estimated NOIValue
AI, CAP & Alternative Use estimations · Realmo proprietary blendComparables
6 recent transactions · within 1.5 miComparable in this City
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Property description
Physical attributes from public recordsZoning & alternative use
No recorded transactions found for this property.
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Operating expenses, capex projections, utility benchmarks, and submarket comparables — all in one view.
Risks
Flood, climate, environmental, title, and tenant-concentration risk — surfaced with mitigations and source citations.