If the buildings are condos or townhomes, then the building is owned by the HOA. In a condo, the homeowner owns from the paint inwards. In a townhouse, the HOA owns the structural elements, but in short, the homeowner owns the sheetrock and paint on "their" side of the walls. Exterior walls and roofs are owned by the HOA.
If the buildings are detached single family houses, then the building is owned by the homeowner.
Basically:
If the buildings are condos or townhomes, then the building is owned by the HOA. In a condo, the homeowner owns from the paint inwards. In a townhouse, the HOA owns the structural elements, but in short, the homeowner owns the sheetrock and paint on "their" side of the walls. Exterior walls and roofs are owned by the HOA.
If the buildings are detached single family houses, then the building is owned by the homeowner.