Final answer:
Harry Potter lives at 4 Privet Drive in Little Whinging, Surrey, with his aunt and uncle, the Dursleys. Initially, he is made to stay in the cupboard under the stairs at their home.
Step-by-step explanation:
Where Harry lives when staying with the Dursleys is a question pertaining to the fictional world of Harry Potter. When Harry Potter stays with his Aunt Petunia and Uncle Vernon Dursley, he lives at 4 Privet Drive in the fictional town of Little Whinging, Surrey. However, his living conditions are not pleasant, as he is made to stay in the cupboard under the stairs before eventually being moved to a small bedroom. This environment is depicted as cold and unloving, which starkly contrasts with the magical world Harry is eventually introduced to. The harsh treatment Harry receives from the Dursleys is a significant part of his early character development, showing his resilience in the face of adversity.