The present invention is directed to an electrical wiring box that includes a wiring device interface portion having a substantially planar member configured to accommodate a structural member on a first side and a rim portion extending from a perimeter of the planar member from a second side thereof to form an enclosed volume. The rim portion has a rim width approximately equal to a width of a sheet of drywall. The wiring device interface portion also includes a plurality of fastener apertures. A fastener storage structure includes a plurality of fastener storage holders extending in a direction substantially perpendicular to the first side of the planar member. The fastener storage holders and the planar member are configured to accommodate the structural member therebetween. Each fastener storage holder includes a fastener holder opening accessible from the second side. Each fastener storage holder is configured to secure a corresponding one of a plurality of fasteners within such that an end portion of a fastener disposed therein does not substantially extend into the volume. A wiring storage box includes a wall surface connected to the fastener storage structure at a first end and not connected to the fastener storage structure at a second end. The wiring storage box includes a sidewall extending contiguously from the rim portion and connected to the wall surface to form an interior wiring storage volume. The wiring storage box also has a wiring ingress portion.