The space you are allowing yourself to live and operate in. Have you separated yourself into different compartments? You are living one life right now, but you may be trying to live two or more separate lives in one. ... The Bedside Dream Dictionary
A dream of an apartment is usually a simple dream and shows the dreamer the state of finances or other situation he or she may be involved in.
A beautiful, lavish apartment indicates you will see a large increase in your income or your family life will improve.
If the apartment is shabby and dark then you will experience misfortune and possible loss of a husband, lover, or money. Try to recall the other symbols that caught your eye in your dream apartment and you will come close to approximating it’s meaning.... Encyclopedia of Dreams
If the apartment was small and/or uncomfortable, you will have to persevere and try to avoid family quarrels; but if it was large and/or luxurious, you can expect a steady increase in prosperity.... The Complete Guide to Interpreting Your Dreams
Compartmentalization. Each door here represents a different aspect of self and your experiences.
Alternatives. Every door is another option waiting for examination.
Being lost in an apartment complex symbolizes having too many options from which to choose, and finding yourself overwhelmed by those options. Narrow down the field a little, then reapproach this situation.... The Language of Dreams