The Smarter Way To Build Modular construction uses the same materials and follows to the same building codes as traditional construction. The difference with modular construction is these materials are assembled, or “pre-built”, inside a manufacturing facility, controlling quality and cost. Imagine what it would mean to the cost and quality of your next car if it were assembled in your driveway often in rainy or snowy conditions. You can begin to understand why modular is the natural next step for new home construction in California!