In there anyone other than Rokuhan who sells pre-built Z scale structures like houses, buildings, etc.? Thanks!
Kevin welcome to z scale. Märklin produced some a long time ago, both European and U.S. styles, as did AZL. You may still find them in resale. Beyond that you might want to be asking the question: who is willing to build z scale structures. Mark
Checking at Walthers, it looks like Faller, Kibri and Vollmer have some pre-built structures. The US style Märklin structures are solid resin. With the availability of relatively affordable laser cutters, wood and cardstock kits are increasingly common. The latest Märklin structures seem to be cardstock kits.
If you don’t mind painting, there’s a popular 3D printing company online that offers z scale buildings.
eBay has plenty of built up and painted buildings. Most are kits fully assembled but there are lots of interesting scratch built items, too.