CAD is an acronym for computer aided design. So basically, the CAD file is just an electronic copy of the house plans that can be altered within a CAD drafting software. Back in the day designers and architects used T-squares, drawing tables, and pencils to design homes.

A 3D floor plan isa type of diagram that shows the layout of a home or property in 3D from above. Unlike a 2D Floor Plan, a 3D Floor Plan includes perspective which makes it easier for you to understand the size and layout of a space.