Does anybody price a duplex cleanout differently from two separate single family jobs

The gap between those two quotes, $1,800 versus $1,300, comes down to which costs actually duplicate and which ones don't. Dumpster placement is one trip, one drop, one pickup regardless of unit count. The crew shows up once, stages equipment once, and drives away once. Those fixed mobilization costs get absorbed across both units when it's a single address, so a vendor who prices thoughtfully will quote something closer to 1.4x a single-unit price rather than 2x. The ones who just multiply by unit count are usually larger operations running a rate card, and the ones who discount for the shared structure are usually owner-operators who think about their own time.

Where a duplex actually costs more than a single-unit job is vertical access and separate locksets. If it's a true stacked configuration, second-floor furniture comes down a staircase that may be interior and narrow, which slows the crew. Two separate utility connections can also mean two separate haul-out points if there's no common area. Ask the vendor specifically how they handle a stacked two-over-two versus a side-by-side before you accept any quote, because those configurations price differently even at the same address. A side-by-side with exterior unit doors and a shared driveway is genuinely close to one job. A stacked unit with a single interior stair is closer to one-and-a-half jobs in labor hours. Which configuration is this one?

Most vendors I have seen work this out somewhere in the middle, and the structure they use matters more than the headline number. A crew mobilizes once, drops one dumpster, and stages from one driveway, so the fixed cost of showing up gets split across two units instead of absorbed twice. That alone usually pulls the duplex quote below the sum of two standalone SFR prices. Whether it lands at $1,300 or $1,500 depends almost entirely on how the vendor classifies the job internally: some shops have a per-unit line and a mobilization line as separate items, and you can negotiate the mobilization as a fixed number with the per-unit rate held constant. Others just quote a flat project price and you have no visibility into how they got there. The second type is harder to push back on because you cannot isolate which component to challenge.

The number that changes this answer is the cubic yardage or debris volume the vendor is estimating for both units combined. A two-bedroom over two-bedroom in Garfield Heights that has been occupied and neglected can easily run 20 to 30 yards of material, and at that volume the dumpster swap becomes the real cost driver, not labor. If the vendor is planning on one pull and one dump, the shared-structure logic holds and a discount from $1,800 makes sense. If the debris load forces two pulls, the dumpster cost runs parallel to what two SFR jobs would cost anyway and the shared-mobilization argument collapses. What condition are the units in, meaning are we talking furniture and general junk, or is there demo material mixed in?

Vendors split on this and the deciding factor is usually dumpster count, not unit count.

Confirm with the vendor whether they price per pull or per job, and ask your dumpster company what a second placement costs on the same address.