The rental property I listed at the Brook House, in Brookline, is a high rise condominium building. Each "apartment" is owned by a separate individual as a "condominium". Each owner BUYS their individual unit.
An apartment building is usually one in which you have one landlord, or entity, that owns the entire property ie. owns the whole building and all the apartments. The people living in each apartment are all renters who all pay rent to one landlord. None of them (renters) can own their own single apartment in the building.
In a condo building such as the Brook House, each individual owner may live in their own unit. Or they may decide to rent their condo apartment to a tenant.
Such is the case with the two bedroom, two bathroom condominium that I posted for rent. The owner purchased the single unit, and the tenant will pay rent to him as their landlord for that particular unit. The next door neighbor may live in the unit they bought, and therefore that condominium will be " owner-occupied" and not a rental.
It might be easier if you gave me a call to further answer your question about townhouses and communites. The definitions have nuances that differ in various locations.
Please let me know if I can help you further.
All Points Proeprties