What was permitted
Homeowners in Mill Valley can get a sense of project costs by looking at recent permits. This permit details the extension of an uncovered deck and the installation of a spiral staircase, likely for a residential property.
This project was issued on June 24, 2026, with an estimated cost of $20,000. The contractor listed is MASTEC COMMUNICAITONS GROUP.
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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 | 93429 |
|---|---|
| Work permit # | — |
| Job filing number | — |
| Work type | Uncovered Decks and Patios |
| Status | Issued |
| Job description | Extend (E) Deck; Install Spiral Staircase |
| Floor / unit | — |
| Estimated cost | $20,000 |
| Approved | August 6, 2025 |
| Issued | June 24, 2026 |
| Expires | — |
| BBL | — |
| BIN | — |
Related searches
deck constructionpatio constructionspiral staircaseMill ValleyMarin Countyuncovered decks and patios$20,000 project cost