If you’ve ever sat down on an outdoor bench and felt it wobble or rock beneath you, you know how annoying—and even unsafe—it can be. Uneven ground is the usual culprit, whether your bench sits on a lawn, gravel, patio stones, or bare dirt. So what’s the best way to level an outdoor bench on uneven ground? The answer depends on your bench’s design, the severity of the slope, and whether you want a temporary fix or a permanent solution. Here’s what I’ve found works best after trying multiple methods on my own backyard bench.
Option 1: Use Adjustable Bench Feet (The Easiest Upgrade)
If you’re building a new bench or don’t mind a small DIY project, replace the bench’s fixed legs with adjustable feet. These are usually plastic or metal discs with a threaded bolt that screws into the leg. You can twist each foot to raise or lower it independently, compensating for dips or rises in the ground. This works brilliantly on patios, decks, or even gravel. I did this on a cedar bench last spring, and it’s been rock-solid ever since. Cost is around $10–$20 per set of four.
Option 2: Use Plastic or Rubber Shims (Quick & Cheap)
For an existing bench, shims are your best friend. Buy a pack of plastic or rubber shims from any hardware store (they’re often used for doors or windows). Slide them under the low legs until the bench sits level. Rubber shims are better because they grip well and won’t slide out. This method takes five minutes and costs less than $10. A friend of mine used shims under her iron bench on a sloped lawn, and it worked even after rain. Note: I don’t recommend wood shims outdoors—they rot and compress.
Option 3: Dig and Level the Ground (Permanent Solution)
If the bench is in a permanent spot and you want a “set it and forget it” fix, level the ground itself. Mark where the bench legs will sit, then dig down a few inches in the high spots or add gravel/crushed stone in the low spots. Tamp it firm, then place a paving stone or concrete paver under each leg. This raises the bench slightly, but the base stays level. I did this for a heavy teak bench on a hill—took an afternoon, but I haven’t touched it in two years. It also prevents the legs from sinking into soft soil.
Option 4: Build a Simple Wooden or Composite Base
For a bench that sits on very uneven ground, like a rocky patch or a sloped garden edge, consider building a small platform. A simple rectangle of pressure-treated lumber or composite decking, leveled with the ground, creates a flat surface for the bench. You can anchor the base with rebar or stakes. This also helps with drainage. I once made a base from leftover cedar deck boards for a curved iron bench—looked neat and stopped the wobble completely.
Quick Pro Tip: Always Check Leveling After Rain
Ground shifts when wet. If you live in a rainy area, test your leveling method after a heavy downpour. I learned this the hard way after using shims on a dry day—found the bench tilted two inches after a storm. Adding a small gravel base under shims solved that.
In short, the best way to level an outdoor bench on uneven ground is to match the method to your situation. For a quick fix, use rubber shims. For a durable solution, install adjustable feet or a ground-leveled base. Tighten everything once a season, and your bench will stay stable through sun, rain, and backyard barbecues.