Short answer: yes, but only if you’re careful—and for many pieces of urban outdoor furniture, I’d skip the pressure washer and use a hose, mild soap, and a soft brush instead. A pressure washer isn’t automatically going to destroy a metal cafe chair or a resin bench, but it can ruin the wrong material in seconds. The real question isn’t “pressure washer yes or no?” It’s “what is the furniture made of, how is it finished, and how much pressure are you using?
Metal furniture—aluminum, steel, wrought iron—is usually the best candidate, but only on low pressure. Powder-coated or painted metal can chip. Once water gets under the coating, rust starts. Use a 40-degree tip, stay at least a foot away, and keep the spray moving. Never blast welds, joints, or hollow legs.
Wood is where I’d be very cautious. Teak, acacia, eucalyptus, and other outdoor woods can handle rain, but a pressure washer can raise the grain, strip oil or stain, open joints, and create splinters. If you must, use the lowest pressure, a wide fan tip, and a wood-safe cleaner. Then let it dry and re-oil. Honestly, a soft brush and soap is safer.
Plastic and resin can be okay, but high pressure can crack it, warp it, or force water into hollow sections. If it’s cheap resin, keep the pressure very low and don’t get close to seams.
Wicker and rattan? I’d avoid the pressure washer completely. Natural wicker can unravel; synthetic wicker can loosen or tear. Vacuum it, then wipe with soapy water.
Cushions and fabric are another no-go. A pressure washer can tear stitching, flatten foam, and strip water-repellent finishes. Check the care label. If covers are removable and washable, follow that. Otherwise spot clean.
Urban furniture adds another wrinkle: if it’s a public bench, bus-stop seat, or cafe furniture you don’t own, don’t pressure wash it. You don’t know the material, and you can damage public property or create a slipping hazard.
If you do use a pressure washer, here’s the safe routine: test a hidden spot first, use an electric washer on its lowest setting, pick a 40-degree or soap nozzle, stay 12–18 inches away, and never use a 0-degree turbo tip. Keep water out of bearings, electronics, and seams. Use mild soap, then rinse with low pressure. Dry everything thoroughly, and re-oil wood or touch up paint if needed.
For most urban outdoor furniture, a garden hose, a bucket of warm water, mild dish soap, and a soft-bristle brush will get it clean without the risk. You might need a little more elbow grease, but you won’t end up with chipped paint, fuzzy wood, or a wobbly chair. If in doubt, start gentle. You can always add more pressure, but you can’t undo damage.