What Can and Can't Go in a Dumpster in Colorado?

Before you start tossing everything from your renovation into the dumpster, know what is allowed and what will get you a contamination fee at the transfer station. Colorado disposal facilities have specific rules, and throwing the wrong items in a roll-off can turn a $360 rental into a much more expensive problem. Here is the practical breakdown for Denver metro projects.

What you CAN put in a dumpster

The short answer: most common household junk, construction debris, and renovation materials are fine. Here is the full list:

• Construction debris: Drywall, lumber, plywood, shingles, siding, tile, brick, concrete (with weight awareness), carpet, insulation, metal studs, nails and screws
• Household junk: Furniture, clothing, bedding, books, toys, decorations, small household items
• Yard waste: Branches, brush, leaves, sod, dirt (heavy — watch tonnage)
• Appliances: Washers, dryers, dishwashers, stoves, microwaves (refrigerators and AC units need freon removal first)
• Electronics: Computers, monitors, printers, small electronics
• General trash: Bags of garbage, boxes, packaging materials, old tools

Most Denver-area jobs — kitchen remodels in Highlands, roofing tear-offs in Centennial, garage cleanouts in Lakewood — involve materials that are fully acceptable. If it came out of a wall, off a roof, or out of a closet, it probably goes in the box.

What you CANNOT put in a dumpster

These items are prohibited at Colorado transfer stations and will trigger contamination fees, load rejection, or both:

The gray areas:

• Paint cans: Empty or dried latex paint cans are usually fine. Wet paint or oil-based paint is not. Pop the lid, let latex dry out with kitty litter, and the can goes in.
• Mattresses: Allowed, but some facilities charge a mattress surcharge. Ask when you book.
• Appliances with refrigerant: The appliance itself is fine after a certified tech removes the freon. Do not put a refrigerator or window AC in a dumpster without certifying the refrigerant is evacuated.
• Concrete and dirt: Allowed but extremely heavy. A 20-yard dumpster full of broken concrete will blow past the included 3-ton weight allowance fast. Overage is $85 per ton — math that adds up quickly. If you are doing a patio tear-out, talk to us about weight limits before you start loading.

Contamination fees: what happens when prohibited items show up

When the load reaches the transfer station and the operator finds tires, liquids, or hazardous materials, the entire load can be flagged. That means:

• Contamination surcharge: Added to your invoice, usually $50-$200+ depending on the material
• Load rejection: The facility refuses the load, and the dumpster comes back to your site — now you need to sort it and try again
• Environmental fines: In serious cases (dumping chemicals, asbestos, etc.), Colorado DPHE can issue fines

None of this is worth it. Spend five minutes pulling out the obvious offenders before we haul.

Weight-heavy materials: allowed but plan ahead

Some materials are perfectly legal to put in a dumpster but can rack up overage charges because they are dense:

• Concrete and masonry: 1 cubic yard of concrete weighs about 2 tons. One third of a 20-yard dumpster filled with concrete could exceed your included tonnage.
• Dirt and soil: Wet dirt is heavier than most people expect. A few wheelbarrow loads of wet clay from a Lakewood excavation can push you over.
• Roofing shingles: A bundle of asphalt shingles is roughly 70 pounds. A full roof tear-off generates significant weight.
• Sod and wet yard waste: Sod rolls are heavy; wet branches are heavier than dry ones.

The solution is not avoiding these materials — it is talking to us about them up front. We may recommend a smaller dumpster that we swap more frequently, or we may suggest loading heavy items first and lighter materials on top to distribute weight.

Denver metro disposal tips

Denver Household Hazardous Waste: The city runs a drop-off facility for paints, chemicals, pesticides, and electronics that do not belong in a dumpster. Check Denver's website for hours and accepted items.

Boulder County: Has stricter sorting requirements than Denver for some materials. If your project is in Boulder, Louisville, or Lafayette, ask about local rules.

HOA dumpster rules: Communities in Highlands Ranch, Castle Pines, and Parker sometimes have rules about what can sit curbside and for how long. These are separate from disposal rules — your HOA cares about appearance, the transfer station cares about content.

Mixing waste types: Construction-only loads sometimes get better rates at certain facilities. If your dumpster is 100% roofing tear-off, mention that — it may affect which facility we route to and what you pay.

Quick pre-loading checklist

Before you start filling the dumpster:

• Pull out anything liquid — paint, oil, cleaning products
• Remove batteries, propane tanks, and pressurized containers
• Set aside appliances with refrigerant for separate handling
• Sort donation-worthy items (furniture, working appliances) separately
• Note if you are loading heavy materials (concrete, dirt, wet sod) and call us about weight

When in doubt, take a photo of the questionable item and text it to us. We will tell you whether it goes in the box, needs separate handling, or belongs at a specialty facility.

Ready to book a dumpster and want to make sure you are loading it right? Call The Junk Trunk at (303) 815-0467 or request a quote online. We will walk through your project, flag any prohibited items, and make sure the right size box lands on your driveway.