08/21/2026
The short answer to this is: yes
Modular construction cannot be placed on a "slab on grade" style foundation. There are a couple of reasons for this, one being that a module is always built with a floor system. In addition, there are utilities that exist within that floor, which crews will need access to from underneath (for instance, to connect a drain line to the on-site septic system). But, there are a variety of "basements" upon which a module can be placed, and they range from a crawl space (~3') to full height basement (~7.5'-9').
In a BrightBuilt Home, that basement is almost always considered part of the "high-performance shell" and as such, will be a fully insulated, air-sealed, water-proofed, and conditioned space. Often, a basement will house the mechanical systems, and can also serve as additional living space, if desired.
The height and space of a basement is, of course, site dependent (due to conditions like water table, bedrock, and more), but you will find that most BrightBuilt homes sit on and make use of full-height basements.
You can find more pop questions like these that we often get form clients on our blog via the link in bio!
