What was permitted
Homeowners in Mill Valley considering an Accessory Dwelling Unit (ADU) can explore the permit process for legalization. This project at 539 NORTHERN AVE (539A) was for the legalization of an attached ADU.
This permit was issued on October 7, 2026, and the specific project cost is not detailed. The contractor for this ADU legalization is currently unknown.
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View the official permit record
Tracking number, work description, cost and dates
View the official permit record
Tracking number, work description, cost and dates
| Tracking number | 93657 |
|---|---|
| Work permit # | — |
| Job filing number | — |
| Work type | Each Additional Hour |
| Status | Issued |
| Job description | [A B 2533] - Legalization Attached A D U |
| Floor / unit | — |
| Estimated cost | Not reported |
| Approved | October 27, 2025 |
| Issued | October 7, 2026 |
| Expires | — |
| BBL | — |
| BIN | — |
Related searches
ADUAccessory Dwelling UnitlegalizationMill ValleyMarin Countyresidentialconstruction