Prefab Backyard ADUs Cost $140K–$240K in 2025
In 2025, prefab backyard accessory dwelling units (ADUs) range from $140,000 to $240,000 and require two to five months for completion. Key to success includes securing permits, engaging licensed contractors, and preparing the site meticulously. Understand how zoning laws, utility integrations, and inspections influence your build to create a valuable, efficient addition to your property.
Wilson BennettDecember 11, 2025