One of the many key selling points of shopping for a modular home in Frederick is that generally speaking, they’re inexpensive to build compared to a stick-built home. Experts estimate that the standard expense per square foot of a finished house to be built is $120. Still, several modular home builders demand more expensive rates than that because of their stylish finishes, going for as much as $200 per square foot spectrum. So to construct a 250-square-foot home, you may expect to pay between $11,306 and $94,217.