How to Calculate ADU Fees in California 2025
Wondering how much it costs to build an ADU in California? This guide breaks down the different fees you might encounter—from city permits and utility connections to school impact fees and plan checks. We explain what each fee means, when it applies, and how to estimate the total cost for your project. Whether you’re just starting or budgeting your build, this article will help you navigate California’s ADU fees with confidence and avoid unexpected surprises along the way.









