Originally posted by GlassDeviant:

They won't spawn in the building area around a workbench. Best to build one somewhere in the Meadows far from any other biome, and build a house around it. As you progress you may want to wall off an area around your house, farm, beehives and other stuff.

I have never managed to build something to the point where I didn't occasionally see greydwarves. Even carpets of work benches don't help.

IMO the Ward should be improved to generate a much larger anti spawn field. They're pretty expensive compared to workbenches.