ADU Cost Calculator, Process Guide & Vetted Builders | OwnAdu

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The 2026 ADU Homeowner's Playbook, free.

A 27-page PDF covering process, costs, permits, and financing — plus monthly updates on what's changing in state ADU law.

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Independent guidance for U.S. homeowners building Accessory Dwelling Units.

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ADU Cost Calculator, Process Guide & Vetted Builders | OwnAdu