Yuliia Bortna 10/7/26 Yuliia Bortna 10/7/26

How Much Does an ADU Cost in California in 2026?

A finished backyard ADU from Bay Modular costs $124,900 to $271,900 in 2026, all in. Here's what the price includes and which fees California law took off the table.

How Much Does an ADU Cost in California in 2026?

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