12660 RIVERSIDE DR
Office building — one story · Los Angeles · 91607
At a glance
12660 RIVERSIDE DR in Los Angeles, CA is listed on the Los Angeles County property roll as “Office building — one story”, AIN 2357033017. The roll records 48,504 sq ft of building area, a 1992 build year and an assessed value of $12,332,334. 17 active business locations at this address appear in public records.
Derived from suite and floor strings in the occupancy records
Which floors show activity
- 33 on record
- 27 on record
- 12 on record
Floors are read from suite numbers on Los Angeles County business records (suite 4900 → floor 49). A floor with no record is not necessarily vacant — it may be mechanical, occupied by the owner, or let to a business whose receipt carries no suite. Receipts also lag reality by months. This shows where the public record places businesses, not a rent roll or an availability report. A stretch of quiet floors is not contiguous space for rent — it is contiguous silence in the record, which is the closest thing the public record has to that question and worth exactly what it costs to check.
Public record — 17 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| CENTER FOR RHEUMATOLOGY MEDICAL CORPORATION | SUITE #200 | Nov 2025 | LA business tax registry | address match · high |
| CONCIERGE CLINICAL TRIALS MEDICAL GROUP, INC. | SUITE #201 | Jul 2025 | LA business tax registry | address match · high |
| CONCIERGE CLINICAL TRIALS, INC | SUITE #201 | Jul 2025 | LA business tax registry | address match · high |
| SIRMID INC | SUITE #100 | Dec 2023 | LA business tax registry | address match · high |
| PANTOGRAN LLC | SUITE #305 | Aug 2023 | LA business tax registry | address match · high |
| MO KANG DDS PHD DENTAL CORPORATION | 240 | Jan 2023 | LA business tax registry | address match · high |
| WEINGARTEN DDS INC | UNIT #210 | Jul 2022 | LA business tax registry | address match · high |
| NANAY LLC | UNIT #110 | Jan 2016 | LA business tax registry | address match · high |
| CEDARS-SINAI MEDICAL CARE FOUNDATIONvia CEDARS SINAI MEDICAL CARE FOUNDATION | SUITE #225 | Oct 2014 | LA business tax registry | address match · high |
| JOSEPH R SHAPIRO MD | SUITE #325 | Jan 2013 | LA business tax registry | address match · high |
| FEATURE ENTERPRISES INC | — | Dec 2011 | LA business tax registry | address match · high |
| LAKESIDE MEDICAL ORGANIZATION A MEDICAL GROUP INC | SUITE #310 320 | Nov 2009 | LA business tax registry | address match · high |
| RHEUMATOLOGY ASSOCIATES | SUITE #200 | Jul 2005 | LA business tax registry | address match · high |
| STUDIO CITY URGENT CARE & MEDICAL CENTER INC | 110 | May 2004 | LA business tax registry | address match · high |
| NICHOLAS DIDOMENICO/BURT LIEBROSS ET AL | SUITE #225 | Sep 1998 | LA business tax registry | address match · high |
| LAZAR-DUCOT ASSOCIATES /C | — | Jan 1993 | LA business tax registry | address match · high |
| ANGELICA ANG DMD | 330 | Jul 1990 | LA business tax registry | address match · high |
Los Angeles County assessment roll
Parcel record
| Field | Value |
|---|---|
| AIN | 2357033017 |
| Site address | 12660 RIVERSIDE DR |
| Land use (DOR) | 1700 — Office building — one story |
| Building area (actual) | 48,504 sq ft |
| Floors / units / buildings | — / — / 1 |
| Lot size | — |
| Year built | 1992 |
| Zoning (primary) | — |
| Land value | $2,119,412 |
| Building value | — |
| Total assessed value | $12,332,334 |
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
- 12660 RIVERSIDE DR
- City
- Los Angeles
- ZIP
- 91607
- Coordinates
- 34.15725, -118.40953
Within ~650 m
Nearby office buildings
- 12925 RIVERSIDE DR12 tenants
38,994 sq ft · 1986
- 12840 RIVERSIDE DR29 tenants
36,612 sq ft · 1965
- 12626 RIVERSIDE DR29 tenants
33,732 sq ft · 1975
- 12800 RIVERSIDE DR8 tenants
17,417 sq ft · 1985
- 12650 RIVERSIDE DR8 tenants
16,280 sq ft · 1973
- 12722 RIVERSIDE DR27 tenants
14,342 sq ft · 1968
How does 12660 RIVERSIDE DR compare with other Los Angeles office buildings?
At 48,504 sq ft, 12660 RIVERSIDE DR is about 3 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 $254 per square foot of building area, against $306 across all office floor area on the roll.
Does the owner of 12660 RIVERSIDE DR 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 2357033017 as “Office Building” (use code 1700). 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 12660 RIVERSIDE DR?
Los Angeles County's published roll does not include owner names, so no owner is shown.
What companies have offices at 12660 RIVERSIDE DR?
17 active business locations at this building appear in Los Angeles County public records, including CENTER FOR RHEUMATOLOGY MEDICAL CORPORATION, CONCIERGE CLINICAL TRIALS MEDICAL GROUP, INC., CONCIERGE CLINICAL TRIALS, INC, SIRMID INC, PANTOGRAN LLC. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 12660 RIVERSIDE DR?
The Los Angeles County roll records 48,504 sq ft of building area, a build year of 1992.
What is the assessed value of 12660 RIVERSIDE DR?
$12,332,334 on the Los Angeles County roll. Assessed values are taxable-roll figures, not market prices.
What is the AIN for 12660 RIVERSIDE DR?
AIN 2357033017, site address 12660 RIVERSIDE DR, Los Angeles. It is the key to look the parcel up in the County Assessor annual roll (Los Angeles County).
More around 12660 RIVERSIDE DR
- Los Angeles County office buildings· 19,626 buildings
- CENTER FOR RHEUMATOLOGY MEDICAL CORPORATION· suite SUITE #200
- CONCIERGE CLINICAL TRIALS MEDICAL GROUP, INC.· suite SUITE #201
- CONCIERGE CLINICAL TRIALS, INC· suite SUITE #201
- SIRMID INC· suite SUITE #100
- Federal office leases in CA
- Office census — all metros
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 2357033017.
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, “12660 RIVERSIDE DR, Los Angeles, CA (AIN 2357033017)”, https://buildingcensus.com/offices/la/office-building-73b94392 (data as of September 20, 2026).