Housing here skews old: 66.3% predates 1980 against a national 49.7%. Those 1,768,816 households renovate rather than rebuild, and renovation is the single most reliable generator of hauling work.
Only 28.8% of Detroit homes are rented, against 34.8% nationally — this is an owner-occupied market. The work looks different: fewer lease-cycle cleanouts, more garages, renovations and long-deferred clearances across 1,768,816 households, won on reputation rather than on a property manager's vendor list.
Detroit has 1,768,816 households across a population of 4,376,828. Junk removal demand tracks households more closely than anything else: people move, renovate, downsize and clear out, and every one of those is a job for someone with a truck and a crew.
Where these figures come from
Every number in these paragraphs is a Census figure for the Detroit metro, compared with the national figure from the same table.