Peer-reviewed research from the Construction Industry Institute (CII) and the Charles Pankow Foundation, published as Revisiting Project Delivery Performance (2018) and referenced by the Design-Build Institute of America (DBIA), consistently finds design-build projects deliver better cost predictability, faster schedules, and fewer change orders than traditional design-bid-build arrangements. For most luxury whole-home remodels, that translates into lower total project cost and less schedule risk than hiring a separate architect, interior designer, and general contractor. For simple single-room updates, a general contractor may be sufficient.