A folding, flared utility vault or enclosure that may be used to protect public utility valves, electrical cables, switches, fiber optic cables, or the like is provided. The system generally comprises a base box having a front panel, back panel, and side panels. Alternative embodiments may further comprise an extension box having a front extension panel, back extension panel, and side extension panels. The various panels of the base box and extension box may have flared bottoms that prevent removal after installation. Additionally a user may attach extension boxes to the base box to increase the amount of storage area within the system.