Providence is not alone in this. Baltimore city does the same thing on rooming houses, technically a different license category than a standard rental, and when I was looking at a 6-bed there in 2021 the inspections were staggered, not simultaneous. The housing office would not schedule room 2 until room 1 passed, which is the part nobody warns you about. That sequential process turned what the city quoted me as a 6-week timeline into 19 weeks before I had a single certificate in hand. I ended up passing on that deal specifically because the carry cost on a dead asset for 5 months killed the projected returns in year one.
The thing I have never seen work is trying to negotiate the inspection sequencing at the counter level. Every investor I know who tried to get a supervisor or a manager to run rooms concurrently got the same answer: the inspector assigned to rooming house certificates has a fixed caseload and a fixed order. What actually moves things is getting the property completely ready before you pull the first permit, no half-finished bathrooms, no open permit history on the address, nothing. In Baltimore the one deal I did watch close fast, about 11 weeks for 5 rooms, the owner had a clean title history, every egress window already installed to spec, and a fire inspection pre-clearance from the fire marshal before the housing office ever showed up. That sequencing still happened but the rooms kept passing on first inspection instead of getting kicked back, and that is the entire variable.