Florence has one unusual feature that shapes almost every quote we write here, so start with it.
The city landfill on County Road 14 takes construction and demolition material only. It stopped taking household garbage, which means a Florence remodel load and a Florence house cleanout can end up at two different places with two different charge structures. Tell your account manager which you have.
Then there is what the landfill counts as construction and demolition material. Its own definition covers masonry, sheet rock, roofing waste, insulation, scrap metal, and wood products, and it leaves out uncontaminated concrete, soil, brick, and asphalt paving. A clean load of broken concrete or brick is therefore a separate conversation from a mixed renovation load, and worth keeping separate.
Weight drives the rest. Shingles, mortar, and tile are heavy for their volume, so a small container filled with them will reach its tonnage long before it looks full. Sorting a demolition pile into a heavy container and a bulky container often beats one large mixed load.
Size and length matter too, though less than people expect. Because containers are priced for the job rather than by the day, a longer rental usually costs the same as a short one. The City charges residents and businesses a fee if it has to collect demolition waste itself, so a container on site is the cheaper route from the start.