SFD Addition and SB9 Conversion at 8426-8428 N Quartz Ave, Chatsworth - Porter Ranch
8426-8428 N QUARTZ AVE, Chatsworth - Porter Ranch, 91306
What was permitted
In the Chatsworth - Porter Ranch area, a permit has been issued for a significant addition to an existing single-family dwelling (SFD). This project includes a new 390 square foot addition, with the existing portion of the SFD being converted to comply with SB9 regulations.
This building addition permit was issued on July 16, 2026, with an estimated project cost of $50,000. The contractor is listed as Owner-Builder (Unknown).
Homeowners in Chatsworth - Porter Ranch considering additions should note that a 390 sq ft SFD addition with SB9 conversion has an estimated project cost of $50,000.
What it cost
Issued
July 16, 2026
Expires
—
License
—
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Filed by Owner-Builder
View the official permit record
Tracking number, work description, cost, and dates
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View the official permit record
Tracking number, work description, cost, and dates
| Tracking Number | 26014-20000-01676 |
| Work Permit # | — |
| Job Filing Number | — |
| Work Type | Bldg-Addition |
| Status | Issued |
| Job Description | NEW 390 S.F. ADDITION TO EXISTING SFD, EXISTING PORTIONOF (E) SFD WITH ADDITION TO BE CONVERTED TO NEW SB9 |
| Floor / Unit | — |
| Estimated Cost | $50,000 |
| Approved | May 6, 2026 |
| Issued | July 16, 2026 |
| Expires | — |
| BBL | — |
| BIN | — |