In-building antenna apparatus and methods for manufacturing and installing the same. In one embodiment, the antenna apparatus includes a radome cover, a lower flange, an antenna housing, a spring-loaded mount apparatus, a signaling interface, and a plurality of spring arms. Each of the spring arms may include at least one tie-down location. Accordingly, when a removable tie is placed around a plurality of tie-down locations, the antenna apparatus resides in an installation configuration; however, when the removable tie is removed from around the plurality of tie-down locations, the antenna apparatus transitions towards a default configuration. The spring arms may also act as a ground plane for the antenna. Spring-loaded mount apparatus as well as methods of manufacturing and installing the aforementioned antenna apparatus are also disclosed.