Why ADU Costs Now Average $230,000 in 2025
In 2025, the national average for constructing a backyard accessory dwelling unit (ADU) stands at $230,000, with costs ranging from $180,000 to $320,000. Factors such as escalating material prices, updated building codes, labor shortages, and increased utility fees contribute to this upward trend. This guide details the elements affecting your project expenses, offers methods to manage costs effectively, and provides insights to safeguard your investment for strong returns.




