Isn't that one Caprica City building from BSG in Vancouver? It was also in an episode of SG-1.
Are you talking about the big kinda spirally-circular building? That's the Vancouver Public Library, and it gets around. Caprica seems to be using it as their City Hall or something, and it's also the alternate universe Fringe Division Headquarters in Fringe this season. (That show's first season was shot in New York City, but the past two have been in Vancouver.)