Might have been an Episcopal Church? I recall that unusual building being a church. Unusual design. Looked like it was designed to capitalize on the Grand River frontage- most of the frontage on Grand River was store fronts.
Edit- a little more Google searching, found a Flicker album with a photo of the Hubbell frontage
[[the church sanctuary)
http://www.flickr.com/photos/71288712@N00/1466527060/
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