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How Much Does an ADU Increase Property Value in California?

September 4, 2026August 29, 2026 by Gijo John

Illustration of a main home and detached ADU, highlighting comparable sales, appraisal trends, rental value and property taxes, with no universal value percentage.

How much does an ADU increase property value in California? See what peer-reviewed sales data, FHFA appraisals and current appraisal rules actually show.

Categories Costs & Financing Tags California, Property Value 2 Comments

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How to Compare ADU Contractor Bids: What Every Quote Should Include
ADU Construction Process: What Happens After Your Permit Is Approved?
How to Finance an ADU in California (2026): Loans, Equity, Rental Income and Grants
JADU vs. ADU in California: 2026 Rules, Owner-Occupancy, Costs, and Which to Build
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How Much Does an ADU Increase Property Value in California? on How to Finance an ADU in California (2026): Loans, Equity, Rental Income and Grants
How to Finance an ADU in California (2026 Guide) on How to Compare ADU Contractor Bids: What Every Quote Should Include

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