10 Clever Under-Sink Bathroom Organization Ideas: Small Space, Big Impact: How I Organize Every Inch Under the SinkLena HartwellJan 20, 2026Table of Contents1. Tiered Sliding Drawers2. Pull-Out Bins for Daily Essentials3. Over-the-Door Rack4. Clear Stackable Boxes5. Adjustable Shelf Risers6. Lazy Susan for Bottles7. Slim Drawer Unit on Wheels8. Hanging Baskets from Tension Rods9. Hooks for Hair Tools10. Waterproof Mat or TrayFAQFree Room PlannerDesign your dream room online for free with the powerful room designer toolStart for FREEA few years ago, I was helping a friend redesign her tiny bathroom, and I discovered she had been storing five half-used bottles of shampoo under the sink—plus a hairdryer wedged between a plumbing pipe and a spare toilet roll. It looked like the underworld of bathroom chaos. That day, I realized small spaces don’t limit creativity—they force it. So today, I’m sharing my top 10 under-sink bathroom organization ideas, straight from projects I’ve done and lessons learned.1. Tiered Sliding DrawersI love installing tiered sliding drawers because they make whatever’s hiding in the back instantly accessible. In one project, we used compact mesh drawers that perfectly hugged the plumbing without wasting an inch. It’s a smart way to avoid the “out of sight, out of mind” problem.save pin2. Pull-Out Bins for Daily EssentialsOne client’s morning routine transformed just by dedicating a small pull-out bin to her skincare kit. We even mapped this layout using a simple bathroom layout planner before buying bins, so nothing felt cramped once installed.save pin3. Over-the-Door RackMounting a slim rack on the inside of the cabinet door is perfect for holding hairbrushes, flat irons, or cleaning spray bottles. Just watch out for hinge clearance—it’s a mistake I made once and had to rehang the rack lower.save pin4. Clear Stackable BoxesThese keep items visible and dust-free. I like labeling each box—cotton pads, dental care, backup soap—so everyone in the house knows where to find and return them.save pin5. Adjustable Shelf RisersIf your cabinet has tall, wasted vertical space, use risers to double your storage levels. In a recent remodel, we paired risers with narrow baskets, maximizing every centimeter while still accommodating the curved plumbing underneath.save pin6. Lazy Susan for BottlesYes, you can use a small Lazy Susan under the sink! I’ve used them for arranging cleaning products—just spin and grab. In tricky layouts, I test-fit these rotations in a free floor plan mock-up before making a purchase.save pin7. Slim Drawer Unit on WheelsIf your under-sink space is wide enough, a wheeled slim drawer unit can be rolled out entirely, making deep cleaning easier. It’s especially great for rentals since nothing is permanently installed.save pin8. Hanging Baskets from Tension RodsA tension rod can suspend lightweight baskets, freeing up the cabinet floor for heavier items. Just be mindful of load limits—too many shampoo bottles and the rod may give up mid-week.save pin9. Hooks for Hair ToolsCommand hooks or clip-in holders work wonders for hanging hairdryers and curling wands. Bonus: it keeps cords untangled and out of puddles. We planned hook placements in an interactive bathroom design preview so the tools didn’t block other shelves.save pin10. Waterproof Mat or TrayFinally, protect the base with a waterproof liner or tray—especially if you store cleaners. In one case, a small leak went unnoticed until we moved trays during a clean-up, and luckily everything stayed dry underneath.save pinFAQQ: What’s the easiest under-sink organization upgrade?A: Adding a pull-out bin for your most-used items—it’s low-cost and instantly convenient.Q: How do I work around plumbing?A: Choose modular storage like small drawers or cut-out trays that fit around pipes without blocking them.Start for FREEPlease check with customer service before testing new feature.Free Room PlannerDesign your dream room online for free with the powerful room designer toolStart for FREE