Hartford, CT worked exactly this way around 2021. On a 5-bedroom converting to per-room, each bedroom needed its own certificate of habitability and the fire marshal had to sign off on egress for every individual room, not just the unit as a whole. The inspections themselves were rarely the slow part, scheduling them was. The city was running a 6 to 8 week backlog and first available slots kept getting pushed. A property in that position can float empty 14 weeks before it produces a dollar, carrying roughly $2,800 in holding costs on top of rehab already done. The detail that catches people is egress: windows two inches too narrow under a per-room standard trigger a reinspection cycle, which in that case added another 3 weeks and about $1,100 in window work. The thing Providence may not have told you is whether you can stagger the inspections or whether they require all rooms certified before any tenancy begins. Hartford required the full certificate for the whole dwelling before any room could be occupied, which was the brutal part. If Providence works the same way, your 3 to 4 month estimate is probably accurate and maybe optimistic depending on their backlog right now. Call the licensing office back and specifically ask whether a partial occupancy permit is possible while the remaining rooms finish inspection. Some cities allow it, Hartford did not, and it is worth asking before you close on the property, because that answer changes your cash flow math entirely.