Architecture | Master Planning | Interior Design | Structural Engineering | MEP/FP Engineering Facility Management | Sustainable Design | Virtual Design | Construction Administration Larson & Darby Group is an award-winning, full-service architecture, engineering (structural - machine foundations, mechanical, electrical & plumbing), interiors, and technology design firm. Our interdisciplinary team of experts create thoughtful building and design solutions. We honor our legacy of design quality and relationships by engaging our clients as partners, not projects. Our diverse portfolio includes work in the following markets: corporate/industrial, academic, healthcare, civic/cultural, municipal, liturgical, recreation, multi-family housing, congregate care, senior living, and retail.