What was permitted
This permit is for the construction of a detached Accessory Dwelling Unit (ADU) and an associated deck at a property in Mill Valley. The ADU is located at 522 Northern Ave, with the address for the ADU itself being 523 Shasta Ave.
The permit was issued on April 16, 2026, with an estimated project cost of $150,000. PRISTINE BUILDING COMPANIES INC is the contractor handling this construction.
Plan a similar project
Want work like this done at your place?
Tell us what you have in mind. We scope it, price it against work like this in Mill Valley, and lines up the right contractor. You approve; we handle the back-and-forth.
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 | 93497 |
|---|---|
| Work permit # | — |
| Job filing number | — |
| Work type | Single Family Dwellings |
| Status | Issued |
| Job description | Detached A D U; Deck |
| Floor / unit | — |
| Estimated cost | $150,000 |
| Approved | September 3, 2025 |
| Issued | April 16, 2026 |
| Expires | — |
| BBL | — |
| BIN | — |
Related searches
detached ADUaccessory dwelling unitdeckMill ValleyMarin Countynew construction$150,000