T&D did it all. The block crews that did those house was also T&D. Anything that has to do with concrete on the residential side, T&D doest it.. Very efficient and well organized what it comes to laying out and pouring a house.

New model names same old floor plan
 

Iris - begonia = lantana and gardenia ONLY concrete..

I assume they can build them faster this way.. I've heard concreate is much stonger

Form Wall stronger than traditional Block home. Much better.