This pair of stamps from Bearstone Construction is on the east side of North Foster Avenue between Michigan and Vine, specifically in front of the Foster Community Center.
The community center contains a small library, which is where I usually have my library holds sent to, since it’s the closest one to home and easier to park at than the main library downtown. It was originally the Foster Avenue School, as the stonework over the door still proclaims. Lansing seems to have named a lot of its early elementary schools after the street they were located on (see also the Allen Street School). I’m surprised no one wanted to be an elementary school’s namesake.
Bearstone Construction, according to its Web site, is “a family owned and operated business in the Lansing area” offering concrete, landscaping, and construction services. Their mailing address actually places them in Bath.