[berkay]

Yes it's very common to rent from a company rather than individual landlords. Some of these companies are massive managing hundreds of thousands apartments. Many of the building are specifically built as rentals and all units are for rent hence there is often a leasing office somewhere in the building.

[AnssiH]

OK. Here such companies just have one central office per city/region, no building-specific ones. The largest companies here manage "only" tens of thousands of rental apartments, though.

[d1zzy]

How are they handling visiting the grounds/future apartments for interested renters? That's one of the main duties of the leasing office people in the US. When looking to rent one visits many such places and asks the leasing office people various questions while doing so.