A general free-download library with a strong architecture/house-model showing (300+ house and building models turned up in a quick search) plus the usual furniture, character and vehicle categories.
Models are tagged by useful variant (rigged, low-poly, printable, animated), which speeds up filtering compared to a flat category list.
Good for a broad, format-agnostic search where you're not committed to one particular tool.
Formats run from Blender and OBJ through 3ds Max, Maya, SketchUp, Collada, STL and DWG; some premium items are resold through TurboSquid alongside the free catalog.
Downloadable 3D models, including a wide range of house and architecture models.
