An electrical box assembly includes an electrical box and a primary bracket. The primary bracket includes a first end panel for securing to a first surface of a stud; a second end panel for securing to a second surface of the stud and in a substantially parallel orientation to the first end panel; and mounting panel, joined to a first surface of the electrical box and located between the first end panel and the second end panel, the mounting panel having a length corresponding to a first stud depth. The primary bracket also includes an adaptation panel, between the mounting panel and the rear panel, having a length corresponding to a difference between the first stud depth and a second larger stud depth. The adaptation panel is selectively manipulated to position the front panel and the rear panel to accommodate either the first stud depth or the second stud depth.