Plans for a multi tiered cat tree that can be built inexpensively with materials found around your shop.
Build a 5 floor cat condo with these detailed plans.  This plan has a great layout of instructions and diagrams to help you build it.
This is a kitty condo gone wild thanks to new woodworking equipment.  I bet the kitties love it though. This condo is truly for an uptown cat!
Build your cat a multi-level cat condo.  It's made with plywood and carpet remnants and kitties love cat trees!