doublestorey

A doublestorey, or double-storey, is a term used primarily in Commonwealth English to describe a building with two floors above ground. The first storey is the ground floor, and the second is the upper floor. The term contrasts with single-storey or one-storey buildings. The spelling "storey" is used in British English; US English uses "story." The hyphenated form "double-storey" is common; variations include "double storey" or "two-storey."

Construction and layout definitions note that a doublestorey house typically requires a more substantial foundation and structural framework to support the upper floor, with load-bearing walls, floor joists, and appropriate damp-proofing. Common materials include timber framing with brick or masonry, concrete, or steel. Internal layouts often place public spaces on the ground floor (living room, kitchen, dining) and private spaces on the upper floor (bedrooms, bathrooms). A central or side staircase connects levels. Exterior design may include balconies, verandahs, or a ground-level garage in some designs. In hot climates, roof overhangs and shading devices are common.

Regional usage varies: in Australia and the UK, two-storey houses are common in suburban development; in India and parts of Southeast Asia, doublestorey homes are also widespread. In the United States, the term "two-story" is more common. The design may incorporate features to maximize views, ventilation, and daylight.

Advantages and drawbacks include more living space per lot area and potential for separating living and sleeping areas, along with improved privacy and views. Drawbacks include higher construction and maintenance costs, greater energy considerations, and accessibility challenges due to stairs. See also two-storey house, duplex, and mezzanine as related concepts.