10999 RIVERSIDE DR
Office building — one story · Los Angeles · 91602
At a glance
10999 RIVERSIDE DR in Los Angeles, CA is listed on the Los Angeles County property roll as “Office building — one story”, AIN 2423009046. The roll records 20,382 sq ft of building area, a 1977 build year and an assessed value of $7,108,696. 22 active business locations at this address appear in public records.
Derived from suite and floor strings in the occupancy records
Which floors show activity
- 38 on record
- 23 on record
- 16 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 — 22 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| A PURO PECHO FOUNDATION | SUITE #306B | May 2026 | LA business tax registry | address match · high |
| OPTIMA FAMILY SERVICES, INC. | SUITE #312 | Oct 2025 | LA business tax registry | address match · high |
| SHIRA MARKETING CO | UNIT #304 | Sep 2025 | LA business tax registry | address match · high |
| ARQ PERU LLC | SUITE #306B | Jun 2025 | LA business tax registry | address match · high |
| THERAPY UNSCRIPTED MARRIAGE & FAMILY THERAPY A PROFESSIONAL CORPORATION | UNIT #101 | Sep 2024 | LA business tax registry | address match · high |
| HEART OF HOPE HOSPICE CARE, INC.via HEART OF HOPE HOSPICE CARE INC | SUITE #105 | Jun 2024 | LA business tax registry | address match · high |
| OMEGA FINANCIAL INC | 100 | Jun 2023 | LA business tax registry | address match · high |
| PEGGI CARBONEL | SUITE #306B | Jan 2023 | LA business tax registry | address match · high |
| JUAN SAPON ALVARADO | SUITE #306B | Jan 2022 | LA business tax registry | address match · high |
| QUINESS ENTERTAINMENT LLC | FLOOR #210 | Oct 2020 | LA business tax registry | address match · high |
| COMFORT CHOICE HOSPICE INC | 206 | Jun 2020 | LA business tax registry | address match · high |
| HEART OF HOPE HOME HEALTHCARE, INC | SUITE #103 | Aug 2019 | LA business tax registry | address match · high |
| PROMINENT HOSPICE CARE GROUP INC | SUITE #102 | Jun 2019 | LA business tax registry | address match · high |
| RIVERSIDE OB LLC | — | May 2019 | LA business tax registry | address match · high |
| 3506 ENTERTAINMENT INC | SUITE #107 | Jan 2019 | LA business tax registry | address match · high |
| ROYAL CROWN HOME HEALTH CARE INC | SUITE #104 | Sep 2016 | LA business tax registry | address match · high |
| GUSDORF MARKETING GROUP LLC | 300 | Mar 2016 | LA business tax registry | address match · high |
| LEBEDEV, MICHAEL & HELMI, A PROFESSIONAL LAW CORPORATION | SUITE #201 | Aug 2014 | LA business tax registry | address match · high |
| MGM FINANCIAL MARKETING | SUITE #214 | Mar 2014 | LA business tax registry | address match · high |
| EMINENT HOSPICE CARE INC | SUITE #306 | Sep 2013 | LA business tax registry | address match · high |
| ESSARE INCORPORATED | SUITE #305 | Jan 2008 | LA business tax registry | address match · high |
| ADVOCATES FOR YOUTH | 300 | May 1994 | LA business tax registry | address match · high |
Los Angeles County assessment roll
Parcel record
| Field | Value |
|---|---|
| AIN | 2423009046 |
| Site address | 10999 RIVERSIDE DR |
| Land use (DOR) | 1700 — Office building — one story |
| Building area (actual) | 20,382 sq ft |
| Floors / units / buildings | — / — / 2 |
| Lot size | — |
| Year built | 1977 |
| Zoning (primary) | — |
| Land value | $3,499,666 |
| Building value | — |
| Total assessed value | $7,108,696 |
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
- 10999 RIVERSIDE DR
- City
- Los Angeles
- ZIP
- 91602
- Coordinates
- 34.15256, -118.36961
Within ~650 m
Nearby office buildings
- 4605 LANKERSHIM BLVD141 tenants
113,626 sq ft · 1973
- 4640 LANKERSHIM BLVD12 tenants
74,998 sq ft · 1982
- 10859 LANDALE ST0 tenants
74,215 sq ft · 1960
- 4343 LANKERSHIM BLVD2 tenants
34,098 sq ft · 1992
- 4418 VINELAND AVE20 tenants
22,080 sq ft · 1947
- 10911 RIVERSIDE DR1 tenants
13,690 sq ft · 1973
How does 10999 RIVERSIDE DR compare with other Los Angeles office buildings?
At 20,382 sq ft, 10999 RIVERSIDE DR is roughly 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 $349 per square foot of building area, against $306 across all office floor area on the roll.
Does the owner of 10999 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 2423009046 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 10999 RIVERSIDE DR?
Los Angeles County's published roll does not include owner names, so no owner is shown.
What companies have offices at 10999 RIVERSIDE DR?
22 active business locations at this building appear in Los Angeles County public records, including A PURO PECHO FOUNDATION, OPTIMA FAMILY SERVICES, INC., SHIRA MARKETING CO, ARQ PERU LLC, THERAPY UNSCRIPTED MARRIAGE & FAMILY THERAPY A PROFESSIONAL CORPORATION. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 10999 RIVERSIDE DR?
The Los Angeles County roll records 20,382 sq ft of building area, a build year of 1977.
What is the assessed value of 10999 RIVERSIDE DR?
$7,108,696 on the Los Angeles County roll. Assessed values are taxable-roll figures, not market prices.
What is the AIN for 10999 RIVERSIDE DR?
AIN 2423009046, site address 10999 RIVERSIDE DR, Los Angeles. It is the key to look the parcel up in the County Assessor annual roll (Los Angeles County).
More around 10999 RIVERSIDE DR
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 2423009046.
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, “10999 RIVERSIDE DR, Los Angeles, CA (AIN 2423009046)”, https://buildingcensus.com/offices/la/office-building-4c6dac5d (data as of September 20, 2026).