Which part of a custom home does Glen and Sandy NOT need a permit and inspection for?

In the context of custom home construction, the aspect of interior design typically does not require a permit or inspection. This is because interior design often involves decorating choices such as paint colors, furniture layout, and aesthetic enhancements that do not affect the structural integrity or safety of the home.

Permits and inspections are generally mandated for elements that involve safety, structural changes, or compliance with building codes, which is why items like the materials used, method of construction, and plumbing, electric, and sanitation systems do require permits and oversight. These components are critical for ensuring that the home is built safely and meets local regulations, making them subject to stringent inspection processes.

Therefore, the focus on interior design as the correct answer is rooted in the understanding that it is primarily about personal or aesthetic choices rather than the fundamental framework of the building itself, which is regulated through permits and inspections.