ADU Costs Now Average $150K: Plan Your Budget
The average cost to build an accessory dwelling unit (ADU) stands at $150,000 in 2025, with ranges from $80,000 for basic setups to $300,000 for custom designs influenced by size, location, and materials. Effective budgeting requires accounting for permits, utilities, and contingencies. This guide outlines strategies to plan efficiently, decide between DIY elements and professional services, and enhance property value without unexpected expenses.



