What type of dwelling is classified as a house?

A house is classified as a domestic dwelling that is specifically designed for residential purposes. This classification includes structures where individuals or families live, offering basic amenities such as areas for sleeping, cooking, and sanitation. The focus on residential functionality distinguishes houses from other types of buildings.

In contrast, options like storage units and locked boxes do not provide living accommodations and are instead used for storing items. Non-static caravans, while they may serve as temporary housing, are not traditional houses, as they can be mobile and are not necessarily intended as permanent residences. The emphasis on a domestic and residential utility makes the correct answer clear, as it aligns with the definition of what constitutes a house in a legal and practical sense.