55.7% of homes in Baltimore were built before 1980, against 49.7% nationally. Older housing means renovation debris, basement and attic clearances, and estate cleanouts when a long-held home changes hands. Across 1,120,269 households that is steady, unglamorous, repeatable work.
Baltimore has 1,120,269 households across a population of 2,849,436. 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 Baltimore metro, compared with the national figure from the same table.