Finding · updated October 5, 2026
The two Los Angeleses: where the city builds and where it complains barely overlap
Rank LA's ZIPs by 311 complaints and by building permits and the top-10 lists share 2 ZIPs: the city builds where it doesn't complain, and complains where it doesn't build.
Los Angeles generates two very different streams of civic data, and they point at two very different cities. One is 311 — the 1,189,902 requests Angelenos have filed to get something fixed since April 7, 2026. The other is building permits — the 25,637 construction jobs the city issued over May 7–September 26, 2026. Rank LA's ZIP codes by each, and the two lists hardly know each other.
Where LA files the most 311 requests:
| ZIP | neighborhood | area | 311 requests |
|---|---|---|---|
| 90057 | Westlake / MacArthur Park | Central LA | 60,981 |
| 90015 | Downtown LA (South Park) | Central LA | 30,175 |
| 90026 | Echo Park / Silver Lake | Eastside | 21,135 |
| 90003 | South Los Angeles | South LA | 21,026 |
| 91331 | Pacoima | San Fernando Valley | 20,327 |
| 90011 | Central-Alameda | South LA | 19,518 |
| 91335 | Reseda | San Fernando Valley | 18,780 |
| 90044 | Athens / South LA | South LA | 18,689 |
| 91342 | Sylmar | San Fernando Valley | 18,534 |
| 90019 | Arlington Heights / Mid-City | Central LA | 17,567 |
This is the dense, central, mostly lower-income core — Westlake and MacArthur Park, South LA, Koreatown, the working-class east San Fernando Valley. Now the other list.
Where LA issues the most building permits:
| ZIP | neighborhood | area | permits |
|---|---|---|---|
| 90272 | Pacific Palisades | Westside | 1,929 |
| 90049 | Brentwood | Westside | 659 |
| 90066 | Mar Vista | Westside | 521 |
| 91344 | Granada Hills | San Fernando Valley | 498 |
| 90045 | Westchester | Westside | 491 |
| 91367 | Woodland Hills | San Fernando Valley | 479 |
| 91335 | Reseda | San Fernando Valley | 452 |
| 90026 | Echo Park / Silver Lake | Eastside | 430 |
| 90042 | Highland Park | Eastside | 411 |
| 90065 | Glassell Park / Cypress Park | Eastside | 396 |
A different map entirely: the Westside (Pacific Palisades, Brentwood, Mar Vista, Westchester) and the single-family Valley (Woodland Hills, Northridge, Studio City). Of the ten ZIPs at the top of each list, just 2 ZIPs appears on both. Pacific Palisades (ZIP 90272), the city's single busiest ZIP for construction, ranks only 85th of 445 ZIPs for 311 volume.
It would be too neat to call this complaints-versus-construction: across all 111 ZIPs with enough permits to compare, the two ranks carry a weak positive correlation (Spearman ρ ≈ 0.53) — busier ZIPs tend to have somewhat more of both, as you'd expect from population alone. The striking part is the tops of the lists: the handful of ZIPs where LA builds the most and the handful where it asks the most of the city are almost completely different places.