Accessory Dwelling Unit (ADU)Marin County
Accessory Dwelling Unit (ADU) Projects in Marin County
1 accessory dwelling unit (adu) projects across Marin County. Real permit-backed costs and licensed businesses.
- 1
- projects on record
- 1
- businesses
- $150,000 – $550,000
- reported price range
Winston
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What does Accessory Dwelling Unit (ADU) in Marin County cost?
Reported costs from real permit filings, not estimates.
Factory-Built ADU Installation at 28 Corte Morada, Greenbrae
Accessory Dwelling Unit (ADU) · Jun 4, 2026
$550,000
Detached ADU and Deck at 522 Northern Ave, Mill Valley
Accessory Dwelling Unit (ADU) · Apr 16, 2026
$150,000
ADU Conversion at 22 Kameha Way, Dillon Beach
Accessory Dwelling Unit (ADU) · Apr 8, 2026
$156,800