Estimating demolition cost means building up from measured quantities to a defensible bid price. The build up is: materials + labor + equipment + subcontractors + disposal = direct cost, then + overhead = job cost, then + profit = bid price. Each layer has a range, not a fixed number. Your actuals depend on what you are tearing out, where it goes, and how tight the access is.
What You Are Pricing
Demolition is not one trade. You are pricing five things that move independently: the tear out itself (labor and tools to remove the existing material), the equipment to do it (skid steers, excavators, saws, dust collectors), the hauling and disposal of the debris (dump fees and trucking), any subcontractor work (asbestos abatement, plumbing or electrical disconnects, engineered structures), and the protection of everything that stays. On a selective interior demo you also carry clean up, dust containment, and chip out at openings. Price each as its own line item so a miss on disposal does not hide in a lump sum.
Direct Cost Buildup
Direct cost is what you spend on the job. Build it line by line.
- Tear out labor: priced per SF or per fixture, driven by what is coming out. Carpet and drywall come out fast. Tile over concrete, plaster with wire lath, and mortared walls come out slow. A two hand crew typically strips 200 to 400 SF of drywall per hour, but only 50 to 100 SF of set tile. Multiply crew hours by the burdened wage.
- Equipment: skid steer, mini excavator, jackhammers, concrete saws, dust collection, and dumpsters. Price by the day or by the week with delivery and fuel. A skid steer changes a wall demo from a week of hand work to a day.
- Disposal: priced by the ton or by the load. Mixed C and D debris runs a dump fee per ton plus trucking. Concrete and metal are cheaper or sometimes free at the dump. Hazardous material costs more. Add a waste factor for bulking, since demolished material takes more volume than it did in place.
- Subcontractors: abatement, engineered structure removal, utility disconnects, and anything requiring a specialty license. These are pass through costs with their own markup.
- Protection and containment: floor protection, wall cover, dust barriers, and HEPA filtration on occupied sites. On a hospital or occupied office this can rival the tear out cost.
- Permits and bonds: demo permits, sidewalk closure, and engineered shoring for load bearing walls.
For a representative scope, a 5,000 SF interior selective demo with 120 fixtures, mixed drywall and tile, two dumpsters, and a skid steer for the heavy stuff, a typical direct cost lands in the range of $4,000 to $6,500. Labor is the largest share, often 50 to 60 percent, with equipment and disposal splitting the rest.
Step by Step Cost Estimate
Work the numbers in this order so nothing falls through.
- 1. Walk the job and scope it: photograph everything, measure areas, count fixtures, and note what is staying. Mark hidden conditions, asbestos suspect material, and load bearing walls.
- 2. Take off quantities by material: SF of drywall, SF of floor finish, LF of base, count of fixtures, tons of concrete. Separating by material lets you price each at its own production rate.
- 3. Price tear out labor: apply your historical production rate per SF or per fixture for each material. Multiply by crew hours times burdened wage.
- 4. Price equipment: list every machine and tool with day rate, delivery, and fuel. A skid steer, a dumpster drop, a concrete saw, and a HEPA scrubber each get a line.
- 5. Price disposal: convert demolished material to tons, apply the dump fee, and add trucking per load. Bulking factor for demo debris is 1.5 to 2.5 times in place volume.
- 6. Add subcontractors: abatement, disconnects, engineered removal. Get their quotes in writing before you bid.
- 7. Sum direct cost: add labor, equipment, disposal, subs, and protection. This is your floor.
- 8. Apply overhead: 10 to 20 percent of direct cost, from your actual books.
- 9. Apply profit: 5 to 15 percent of (direct plus overhead), set by risk and market.
- 10. Sanity check: divide the bid price by SF and by ton. Compare to your recent jobs and local market numbers.
Factors That Move the Number
Material type is the biggest driver. Tile and plaster cost two to four times what drywall costs per SF to remove. Access is the next one. A demo on the third floor with one elevator and finished hallways in between costs far more than the same scope at grade with a roll up door. Hazardous material changes everything, because abatement has its own licensing, containment, and disposal path. Occupancy matters: working nights or in a building that must stay live adds protection, scheduling, and noise rules. Hidden conditions, rotted framing behind a wall, asbestos under tile, or a buried oil tank, blow estimates out. Permit and inspection load varies by city and by structure type. Engineering for load bearing walls adds design cost before the first hammer swings.
Common Mistakes
- Using a flat SF price without separating by material. Drywall and tile are not the same animal.
- Skipping the bulking factor on disposal, then running out of dumpster space halfway through.
- Not pricing protection on an occupied site, then eating the dust control bill.
- Forgetting abatement quotes until after bid day.
- Using markup instead of margin. Ten percent markup is not ten percent margin.
- Not burdening the labor rate before marking up. The wage you pay is not the wage you carry.
- Setting one profit number on every job regardless of risk and access.
- Skipping the SF and ton sanity check against your own past jobs.
Putting It Together
Build the estimate from quantities up, not from a rule of thumb down. Walk the job, separate materials, price each at its own production rate, add equipment, hauling, and subs, sum the direct cost, then layer overhead and profit on top. The bid price is direct cost plus overhead plus profit, nothing else. When the takeoff is honest and the disposal and access are scoped on site, the number holds up on bid day and on payday.