These companies offer the range of services, in-house or subcontracted, that allow them to build the additions and alterations (think kitchen and bath renovations, master suites) that substantially change the look, feel, or square footage of a home. Many specialize in a particular type of renovation—kitchens and baths, for instance, or historical restoration—but big custom projects, either designed by the company or built off an architect’s plans, are what their business is about. Click here to see Scholl Construction Top Remodeler of 2013.