And using price per square foot to compare modular home pricing is like comparing apples and oranges. That comes out to just around 11890 per square foot of living space and includes a two-car garage a beautiful porch a full basement three bedrooms two bathrooms a modern kitchen and gorgeous hardwood floors. Customized Bohemia Model Beracah Home Best Modular Homes Manufactured Home Modular Home Plans Setting up a prefab house includes site prep foundation delivery assembly and utility construction. How much does a custom modular home cost . Add in porches decks garages bonus rooms etc. Its estimated that modular construction costs 5-25 percent less than traditional homes built on-site although some companies claim savings of up to 50 percent. Fabrication finishes delivery and assembly can cost 250 to 450 per square foot on average. In this article well look at all of these factors and provide you with a handy calculator to work out how much a modular home should cost from