The Gebäude- and Wohungsregister also says that the address data is correct: https://pasteimg.com/image/screenshot-from-2024-09-04-08-15-43.hObFd

I added the buildings some months ago here in https://www.openstreetmap.org/changeset/145065711, with the GWR data from http://qa.poole.ch/addresses/ch/