SEIU-LOCAL 121 RN
ActiveBusiness · Los Angeles County, CA
At a glance
Public records place SEIU-LOCAL 121 RN at 1 active location in 1 Los Angeles office building. Locations include 4146 LANKERSHIM BLVD (404).
Public record — Los Angeles County
Office locations (1 active)
| Building | Suite / floor | Submarket | Since | Source | Match |
|---|---|---|---|---|---|
| 4146 LANKERSHIM BLVD | 404 | Los Angeles | Sep 2005 | LA business tax registry | address match · high |
Where does SEIU-LOCAL 121 RN operate in Los Angeles?
The earliest active record dates from Sep 2005.
Across Los Angeles, 55,341 active business locations are matched to office buildings; SEIU-LOCAL 121 RN accounts for 1 of them.
How does BuildingCensus know SEIU-LOCAL 121 RN is at these addresses?
Each location is a business record whose premises address was matched to a county office parcel (record types on this page: LA business tax registry). The match method and confidence are shown on every row.
A record at an address is evidence that the business operates there, not a lease: records lag moves by months, and businesses without a local record at an address do not appear.
Frequently asked questions
Where are SEIU-LOCAL 121 RN's offices in Los Angeles?
Public records place SEIU-LOCAL 121 RN at 1 active location in Los Angeles County: 4146 LANKERSHIM BLVD (404).
How long has SEIU-LOCAL 121 RN been at its Los Angeles locations?
The earliest active record starts Sep 2005. Start dates are when the record was opened, which can trail the actual move-in.
Related
Data provenance — public records only
- Los Angeles County — County Assessor annual roll (use codes, areas, values; California law redacts owner names from bulk data) and the city Office of Finance active-business registry, whose addresses carry floor and suite numbers.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
Dataset updated . Locations from Los Angeles County business records matched to county office parcels.
About this data
Source: County Assessor annual roll (Los Angeles County), as published October 5, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “SEIU-LOCAL 121 RN — Los Angeles office locations”, https://buildingcensus.com/offices/la/companies/seiu-local-121-rn (data as of October 5, 2026).