340 S MAIN ST
Office building — one story · Los Angeles · 90291
At a glance
340 S MAIN ST in Los Angeles, CA is listed on the Los Angeles County property roll as “Office building — one story”, AIN 4286004009. The roll records 71,935 sq ft of building area, a 1992 build year and an assessed value of $27,552,313.
Public record — 0 matched business locations
Tenants & business locations
No active business locations at this address appear in the public records ingested so far. That is a statement about the records, not the building: tenants without a county business-tax receipt or a Florida registration at this address are invisible to public data.
Los Angeles County assessment roll
Parcel record
| Field | Value |
|---|---|
| AIN | 4286004009 |
| Site address | 340 S MAIN ST |
| Land use (DOR) | 1703 — Office building — one story |
| Building area (actual) | 71,935 sq ft |
| Floors / units / buildings | — / — / 1 |
| Lot size | — |
| Year built | 1992 |
| Zoning (primary) | — |
| Land value | $4,696,407 |
| Building value | — |
| Total assessed value | $27,552,313 |
Recorded owner (assessment roll)
No owning organisation shown. Where the county roll names a private individual, the name and mailing address are not published here.
Location
- Address
- 340 S MAIN ST
- City
- Los Angeles
- ZIP
- 90291
- Coordinates
- 33.99549, -118.47668
Within ~650 m
Nearby office buildings
- 300 ROSE AVE0 tenants
105,889 sq ft · 1949
- 3100 MAIN ST0 tenants
43,683 sq ft · 1986
- 354 MAIN ST0 tenants
34,395 sq ft · 1979
- 204 HAMPTON DR7 tenants
31,838 sq ft · 2007
- 909 OCEAN FRONT WALK0 tenants
29,040 sq ft · 1984
- 610 ROSE AVE0 tenants
15,420 sq ft · 1968
How does 340 S MAIN ST compare with other Los Angeles office buildings?
At 71,935 sq ft, 340 S MAIN ST is about 4 times the size of the average office building on the Los Angeles County roll, which comes to 19,230 sq ft across 19,626 buildings.
Its assessed value works out to $383 per square foot of building area, against $306 across all office floor area on the roll.
Does the owner of 340 S MAIN ST hold other Los Angeles office property?
Los Angeles County's published roll does not include owner names, so no owner is shown for any parcel in this metro.
What does “Office Building” mean for this parcel?
The Los Angeles County roll classifies AIN 4286004009 as “Office Building” (use code 1703). BuildingCensus includes a parcel in its office census when the roll gives it an office-class use, so the label is the county's, not an inference.
Frequently asked questions
Who owns 340 S MAIN ST?
Los Angeles County's published roll does not include owner names, so no owner is shown.
What companies have offices at 340 S MAIN ST?
No business locations at this building appear in the public records ingested so far — no licence, tax or registry record currently lists this address; that is a gap in the record, not proof the building is empty.
How big is 340 S MAIN ST?
The Los Angeles County roll records 71,935 sq ft of building area, a build year of 1992.
What is the assessed value of 340 S MAIN ST?
$27,552,313 on the Los Angeles County roll. Assessed values are taxable-roll figures, not market prices.
What is the AIN for 340 S MAIN ST?
AIN 4286004009, site address 340 S MAIN ST, Los Angeles. It is the key to look the parcel up in the County Assessor annual roll (Los Angeles County).
More around 340 S MAIN ST
Everything here comes from public records, and public records go stale. If you know better, say so.
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.
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Dataset updated . Source: Los Angeles County assessment roll, AIN 4286004009.
About this data
Source: County Assessor annual roll (Los Angeles County), as published September 20, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “340 S MAIN ST, Los Angeles, CA (AIN 4286004009)”, https://buildingcensus.com/offices/la/office-building-39e59f85 (data as of September 20, 2026).