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Westin Book-Cadillac Detroit

220 Michigan Avenue & 1114 Washington Boulevard
Detroit MI United States

Construction Dates
Floor Count29
Basement Floors3
Units / Rooms521
Building Uses
 - hotel
 - conference
 - residential
 - restaurant
 - retail
Structural Types
 - highrise
Architectural Style
 - neo-classical
 - limestone
 - brick

 Heights ValueSource / Comments 
Spire349 ftSandvick Architects, June 1, 2007
to tip of decorative copper crowns
Roof340 ftSandvick Architects, June 1, 2007
to rebuilt mechanical penthouse roof
31st floor roof330 ftSandvick Architects, June 1, 2007
to 31st floor roof deck
Main roof317 ftSandvick Architects, June 1, 2007
to 30th floor roof deck

- Architect: Louis Kamper

- Developer: Book Brothers

- Architect (renovation): Sandvick Architects, Inc.

- Developer (renovation): Ferchill Group

- General Contractor (renovation): Marous Brothers Construction/Jenkins Construction

- The structure was originally constructed with 29 main floors, plus 3 additional floors in a prominent mechanical penthouse, which held 1,138 guestrooms. The penthouse was reconstructed and shortened by 5.46 meters as part of the 2006-2008 renovation.

- A 2006-2008 renovation of this structure included converting the former hotel into a mixed-use hotel/condominium including 455-room Westin hotel, and 67 upscale condominium units, as well as adding a 3-story addition to the northside of the hotel that includes a banquet hall, kitchens, swimming pool and a fitness center.

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Drawing by Joern Moehring
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