4. Under the Sink Cabinet’s Kick Plate
That small recessed space at the bottom of your kitchen or bathroom cabinets is usually wasted—but it doesn’t have to be. The kick plate, or toe-kick, can be removed and turned into a hidden drawer or compartment. You can either build a slide-out mechanism or simply attach a magnetically sealed cover. This spot is great for flat safes or storage boxes and works especially well if your cabinetry is dated or cluttered. Burglars almost never look in this space, especially since it usually requires kneeling or unscrewing parts. It’s a fantastic low-effort, high-reward option for anyone who wants a quick-access secret spot.