Welty Homes has been a leader in the new home market in Bethesda, MD since 1991. Dave and Steve Welty started the company in 1983 and have since enjoyed a growing clientele of satisfied customers. Focusing on building quality, high-efficient green homes that enrich their neighborhoods, Welty Homes prides itself on excellent customer service. Whether itâs the building of a new home, an addition to your existing home or a tear-down of an older home, Welty Homes are built with craftsmanship and care. With over 300 homes builtâ26 on Johnson Avenue in Bethesda aloneâWelty Homes is the local builder in Montgomery County and the surrounding area.