Why are Modular homes so popular? It is because people like the ability to move into their new house within three months of the start of the job. Prefab houses typically take 3 to 5 months to complete. While your builder is preparing the foundation for the home, the manufacturer is constructing the home indoors in a controlled quality environment. This means your home will not suffer from extreme atmospheric condition conditions.Modular building in Greenville is developing in favor with homeowners and constructors. Homeowners like having a wide array of floorplans to choose from. They are efficient to choose from Modular Cape Cods, Lewiston ID homes Modular Ranches, Modular Two-Story, and Modular Duplex Apartments. Builders like being able to complete a house within three months time. This allows them to build more houses in a 365 days.