Open data · Los Angeles Open Data

Building permits in ZIP 91311 (Chatsworth - Porter Ranch), Los Angeles

764 building permits were issued in ZIP 91311 (Chatsworth - Porter Ranch), Los Angeles over the last 12 months — #25 of 113 ZIP codes in Los Angeles and 1.2% of the city total. Median declared value: $8,000 (1.0× the city-wide median).

Permits, 12 months
764
#25 in Los Angeles
Median declared value
$8,000
Total declared value
$29.6M
Top permit type
Bldg-Alter/Repair
499 permits

Permits issued per month

Oct 2024Oct 2026 (to date)
Show as table
MonthPermits issued
Oct 20269
Sep 202671
Aug 202681
Jul 202663
Jun 202663
May 202665
Apr 202656
Mar 202670
Feb 202642
Jan 202667
Dec 202559
Nov 202559
Oct 202559
Sep 202571
Aug 202548
Jul 202537
Jun 2025114
May 202562
Apr 202590
Mar 202584
Feb 202554
Jan 202562
Dec 202449
Nov 202478
Oct 202471

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Permits by type (last 12 months)

Permit typePermitsShare
Bldg-Alter/Repair49965.3%
Bldg-New547.1%
Grading547.1%
Swimming-Pool/Spa536.9%
Bldg-Addition526.8%
Nonbldg-New192.5%
Sign182.4%
Nonbldg-Alter/Repair121.6%
Bldg-Demolition30.4%

Largest permits of the last 12 months

Ranked by declared value. Owner, applicant and contractor names are not shown.

AddressWorkDeclared valueIssued
21000 W Plummer StBldg-NewePlan.PROPOSED 1-STORY COUNSELING OFFICE - TYPE VB BUILDING. This is also a BHCIP (Behavioral Health Continuum Infrastructure Program) Project.$2.0MDec 5, 2025
21551 W Prairie St 1st Flr-Mezz.Bldg-Alter/RepairExterior/Interior Tenant Improvement to (E) Offices at 1st Floor and Mezzanine . Exterior work including replacing roll-up doors . Work at 1st Floor including new non-bearing partitions for new offices and electrical room, interior storefront, ceiling work, casework/millwork, and$1.1MMar 6, 2026
9571 N Andora AveBldg-NewNew two story single family dwelling (standard plan 657_plan 2cr) with attached garage_building shall be fully sprinklered with nfpa 13d.$840,000Jul 9, 2026
10555 N Independence AveBldg-NewEplan new 2 story sfd with attached two car garage , nfpa-13d fire sprinklers required throghout, all work per engineering$650,000Nov 27, 2025
20520 W Nordhoff StBldg-Alter/RepairEplan. Change of use from (e) manufacturing building to (n) sculpture & painting manufacturing & retail$485,500Oct 2, 2026
10750 N Independence AveBldg-NewEplan: proposed new 2-story single family dwelling (sfd) per sb9 with attached 2-car garagesfd to be fully sprinklered. "sprinkler nfpa 13d$475,000Feb 9, 2026
22012 W Tulsa StBldg-NewNew two story sfd with attached two car garage per tentative tract aa-2005-347-pmla , nfpa-13d fire sprinklers required , all work per engineering$472,000Aug 24, 2026
22020 W Tulsa StBldg-NewNew two story sfd with attached two car garage per tentative tract aa-2005-347-pmla , nfpa-13d fire sprinklers required , all work per engineering$472,000Aug 26, 2026

Frequently asked questions

How many building permits were issued in ZIP 91311 (Chatsworth - Porter Ranch), Los Angeles?
764 permits in the last 12 months — 1.2% of all permits in Los Angeles, ranking #25 of 113 ZIP codes. The most common type was Bldg-Alter/Repair (499).
What is the median permit value in ZIP 91311 (Chatsworth - Porter Ranch), Los Angeles?
$8,000 across permits with a declared value, 1.0× the city-wide median ($8,000). Total declared work: $29.6M.

Nearby in the ranking

All ZIP codes in Los Angeles

Source: Building and Safety – Building Permits Issued from 2020 to Present (LADBS), Los Angeles Open Data. Licence: Los Angeles Open Data Terms of Use. 12-month window from Oct 1, 2025. Declared values are applicants’ estimates and are not verified; personal names are omitted. Generated Oct 12, 2026.