What was permitted
This permit is for the construction of a new attached Accessory Dwelling Unit (ADU), identified as 139A, at 139 Belvedere Dr in Mill Valley, Marin County. This project falls under the category of Single Family Dwellings, indicating an addition to an existing property.
The permit was issued on May 18, 2026, with an estimated project cost of $300,000. AVILAS CONSTRUCTION INC is the contractor for this new ADU build.
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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 | 93353 |
|---|---|
| Work permit # | — |
| Job filing number | — |
| Work type | Single Family Dwellings |
| Status | Issued |
| Job description | New A D U - Attached |
| Floor / unit | — |
| Estimated cost | $300,000 |
| Approved | July 14, 2025 |
| Issued | May 18, 2026 |
| Expires | — |
| BBL | — |
| BIN | — |
Related searches
ADUaccessory dwelling unitnew constructionMarin CountyMill Valley$300,000