The cost of constructing a two-storey house in Perth can vary significantly based on several factors, including the size, shape, and design of the home. As of the 2021-2022 period, the average cost for building a double-storey house typically ranges from $1,700 to $2,500 per square metre. This price range reflects the diverse options available in terms of materials, architectural styles, and finishes. For instance, a more complex design with high-end materials may push costs toward the upper end of this spectrum, while a simpler, more straightforward design could be more economical. Additionally, other factors such as site preparation, local regulations, and labor costs can also influence the overall budget. Therefore, it is essential for prospective homeowners to conduct thorough research and consult with builders to obtain accurate estimates tailored to their specific project requirements.