This building served as the Pierce County courthouse from 1875-1902. It is best known today as the Belvin House, for owner Robert Belvin. Other owners over the years included Charlie Davis and Gene Baker. The Blackshear Times references Pierce County historian Dean Broome in validating the courthouse identify. The GeorgiaInfo page on Pierce County states that the courthouse was torn down in 1902, but that is incorrect.
Robert Barnhill confirms: Definitely YES it was the Pierce County Courthouse many years ago. I have been inside this building back when the Davises lived there and the glass transom windows above the downstairs rooms still have the names of the elected offices that used to be therein painted on the glass. The downstairs layout is easily recognizable as a County Courthouse and offices, a central hallway and offices on he sides and large stairwell. The last time I went upstairs, about 25-30 years ago, they had built one  bedroom in the corner [ new 2×4 construction with insulation and sheet rock, but the remainder of the upstairs [ about 3/4ths of it ] was still a single huge room, set up as the old County Courtroom. I worked with Ms Davis and she took me on a tour to show me it was the old Courthouse.