It is a vector file that can be used on laser cutting machine(DXF format file)
You can download the DXF file ,cut the parts on laser cutting machine and then assemble a house.
The STL files are for 3d printing.
Ignore the obj and fbx format files, they are only used to meet cgtrader's requirement.
The house is appr. 210X_170_X232 mm after assembly.