a·part·ment | con·do·min·i·um

An apartment (also known as flat or unit, depending where you are from), is a self-contained housing unit that occupies only part of a building.
Condominium references a lifestyle where each homeowner owns their individual unit within a building, but do not typically own a plot of land.
There are rules and fees associated with condo living, often a trade-off for maintenance-free living.