laundry facilities may reside in a common area accessible to all building tenants, or each apartment may have its own facilities. depending on when the building was built and its design, utilities such as water, heating, and electricity may be common for all of the apartments, or separate for each apartment and billed separately to each tenant. (many areas in the us have ruled it illegal to split 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 almost always billed separately from the rent payments. cable television and similar amenities also cost extra. parking space(s), air conditioning, and extra storage space may or may not be included with an apartment. rental leases often limit the maximum number of residents in each apartment.