Van Sant Custom Home Builders. Proudly building America since 1973. Visit our large lots on Harrisville and Woodville Road in Mt. Airy Md. or we can build on your lot. We'll be happy to give you a tour of our current inventory of lots from 1.3 acres to 6.5 acre tracts as well as our in progress homes. We have some great model plans to choose from or bring your own plans. These are custom homes.