How Much Debris Does Demolishing a House Create?

The first thing most people get wrong about demolition debris is the scale. A house feels like a big box of air with some walls, but once it is on the ground it is a pile of dense material, and you pay to move and dispose of it by the ton. I like to run the numbers before anyone asks for a quote, because the answer changes how you plan bins, trucks, and budget. Everything below is a planning estimate, and I will flag where it gets soft.

Start with weight, not volume

Disposal sites weigh loads on a scale, so weight is the number that touches your wallet. The simplest way I know to get a first estimate is debris per square foot of floor area. For a typical wood-frame house, I use about 80 pounds per square foot. That figure rolls up framing, sheathing, siding, roof layers, drywall, flooring, and fixtures into one number. It is a planning figure, not a measurement, and I would never present it as exact.

The math is short. Floor area times storeys times pounds per square foot gives total pounds, and dividing by 2,000 gives US tons. A 1,500 square foot single-storey house is 1,500 × 80 = 120,000 pounds, or about 60 tons. In metric that is roughly 54 tonnes. If you would rather not do it by hand, the

demolition debris and dumpster calculator

does it for several structure types and shows both units.

Planning figures by structure type

The pounds per square foot number moves a lot with what the building is made of. These are the planning figures I start from:

• Wood-frame house: about 80 lb/ft². The lightest of the full structures, and the bulkiest per pound.

• Masonry or brick: about 140 lb/ft². Brick veneer or block walls add a lot of mass.

• Steel and concrete: about 200 lb/ft². Commercial and heavy structures sit up here.

• A 4 inch concrete slab on its own: about 50 lb/ft².

• Interior strip-out only: about 15 lb/ft². Drywall, flooring, and fixtures, with the structure staying put.

Treat each as the middle of a wide range. Plaster-and-lath walls weigh far more than drywall. Three layers of asphalt shingles on the roof add real tonnage. A house with a finished basement and a detached garage is not one number. Where I know something specific, I overwrite the preset rather than trust it.

Why volume is a different problem

Weight tells you what disposal costs. Volume tells you how many bins you need. They are tied together by loose density, meaning how many pounds fit in a cubic yard of debris as it sits in the bin. Broken-up wood framing is full of air gaps, so I plan around something like 350 pounds per cubic yard. Our 60 ton house at 120,000 pounds divided by 350 is about 343 cubic yards of loose debris. That surprises people, because it is far more than they picture.

Dense material flips the picture. Crushed concrete might be 1,400 pounds per cubic yard or more. The same weight of concrete fits in a quarter of the space, so concrete jobs are limited by the weight a truck can carry, while light wood jobs are limited by how much will fit in the bin. This is the reason I look at both numbers every time, and why

picking a dumpster size

is its own question.

What disposal can cost in Fort McMurray

Weight matters because landfills price by it. For a concrete local example, the Regional Municipality of Wood Buffalo 2026 fees schedule lists mixed construction and demolition waste at $180 per tonne when it arrives unsorted, and $115 per tonne with recyclables removed. There is also a $50 scale fee per visit. You can read the schedule yourself in the

RMWB 2026 fees, rates and charges schedule

. Check it again before you budget, since schedules change.

Run that against our 54 tonne house as pure arithmetic. Unsorted, 54 tonnes at $180 is about $9,800. With recyclables pulled out and taking the lower rate, 54 tonnes at $115 is about $6,200. That gap is roughly $3,500, and it comes entirely from sorting. I am not quoting a job here. The point is that the per-tonne rate times a weight you can estimate in five minutes is a number worth knowing before you call anyone. Hauling, labour, and equipment are separate costs I have not included.

Where this estimate gets soft

I want to be honest about the limits. Two houses with the same footprint can differ by a third or more. Reasons I have learned to ask about up front:

• How many roof layers are there, and what is under them?
• Is the foundation or slab coming out, or staying?
• Is there a basement, a garage, a deck, or a shed?

• Will metals, clean concrete, and wood be separated, or will it all go in together?

• Is any of the material hazardous, like asbestos-containing products?

That last one matters more than the rest. Older buildings can contain materials that need special handling and testing before demolition starts, and that is a different process from ordinary debris. A calculator cannot see any of that. Use it for planning, then have someone look at the building.

Turning the estimate into a plan

Once you have tons and cubic yards, the next steps are bin count and scheduling. I take the weight, divide by the roll-off weight limit, and compare that with the volume divided by the bin size. Whichever is larger is the number of loads. Some jobs are volume-limited, some are weight-limited, and it often changes with the bin size you pick.

If you are in the Fort McMurray area and want a ballpark on the demolition itself rather than just the debris, there is an estimator from a local contractor,

Demolition Dogs

, that gives a quick range before a site visit.

The bottom line

Use floor area, storeys, and a pounds-per-square-foot planning figure to get tons. Divide by a loose density to get cubic yards. Multiply tons by the local disposal rate to see what is at stake, and remember sorting can change that rate substantially. Then treat the answer as a ballpark, because the building in front of you always has surprises the formula does not. Start with the

demolition debris calculator

, then walk the site.