Holt Construction, Inc. / 770-652-3438 / Dacula, Ga Holt Construction, Inc (HCI) is a company located in the Metro Atlanta area. At HCI, we are proud to say we only use highly qualified professionals and sub-contractors, and the finest materials, on every project. From the biggest budget projects, to the smallest remodels, at HCI, we offer a craftsmanship that is second to none.