A house
The standard reading treats the house as the psyche: the basement as what is buried, the attic as what is stored, unfamiliar rooms as capacities you have not used.
Dreams about places
School or an exam
A standard performance-anxiety dream. It tends to recur before real evaluations regardless of how well prepared you are.
Stairs
Climbing suggests effort toward something; descending suggests going into what is buried. Stairs that never end are a common anxiety image.