A garden apartment complex consists of low-rise apartment buildings built with landscaped grounds surrounding them. The apartment buildings are often arranged around courtyards that are open at one end. A garden apartment has some characteristics of a townhouse: each apartment has its own building entrance, or just a few apartments share a small foyer or stairwell at each building entrance. Unlike a townhouse, each apartment occupies only one level. Modern garden apartment buildings are never more than three stories high, since they typically don't have elevators (lifts). However, the first "garden apartment" buildings in the United States, developed in the early 20th century, were five stories high. Some garden apartment buildings place a one-car garage under each apartment. The grounds are more landscaped than for other modestly scaled apartments.

Another definition of "garden apartment" is a unit built half below grade or at ground level. The implication is that there is a view or direct access to a garden from the apartment, but this is not necessarily the case.

Laundry facilities may be found in a common area accessible to all the tenants in the building, or each apartment may have its own facilities. Depending on when the building was built and the design of the building, utilities such as water, heating, and electricity may be common for all the apartments in the building or separate for each apartment and billed separately to each tenant (however, many areas in the US have ruled it illegal to spl it a water bill among all the tenants, especially if a pool is on the premises). Outlets for connection to telephones are typically included in apartments. Telephone service is optional and is practically always billed separately from the rent payments. Cable television and similar amenities are extra also. Parking space(s), air conditioner, and extra storage space may or may not be included with an apartment. Rental leases often limit the maximum number of people who can reside in each apartment. On or around the ground floor of the apartment building, a series of mailboxes are typically kept in a location accessible to the public and, thus, to the mailman too. Every unit typically gets its own mailbox with individual keys to it.