Welch Design Studio and Welch Design Studio Interiors are complementary Los Angeles studios under one roof, offering custom residential architecture, interior design, or both as one complete vision. Founded in 2006 and led by husband-and-wife team Marc and Lisa Welch, the firm brings more than 60 years of combined experience to custom residences, major remodels, and complete interiors. From the first conversation through completion, the team listens closely, collaborates with every project partner, and provides full-service design at every stage.