A double-storey extension is a construction project that adds two additional floors to an existing building, typically a house. This type of extension can provide extra living space, such as additional bedrooms, bathrooms, or a larger kitchen, enhancing the overall functionality of the home. These extensions are often designed to blend seamlessly with the original structure, maintaining architectural harmony. Homeowners may choose a double-storey extension to increase property value and accommodate growing families without the need to move to a new location.