What's a semi-custom home plan? It's a pre-drawn blueprint that includes options, whether in the form of a flex room that can become an office or guest suite (depending on which doors you add), or a different configuration for the master bathroom. Or perhaps you get the option of a deck versus a patio. How about an extra garage bay? Just about any stock plan can be customized with the help of our modification department, but these ones make it easy. Take a look at these house plan designs with semi-custom options.