Installing a fiber distribution system in a building having multiple floors includes routing a feed fiber to a first enclosure located at one of the floors of the building; disposing pre-connectorized ends of distribution fibers within the first enclosure; routing optical ferrules, which terminate second ends of the distribution fibers without connector bodies, through the building via a sheath; accessing the optical ferrules of the distribution fibers at respective floors; attaching connector bodies around the optical ferrules; and disposing the connector bodies within fiber distribution terminals at the appropriate floors.