504 N MACLAY AVE
Professional services building · San Fernando · 91340
At a glance
504 N MACLAY AVE in San Fernando, CA is listed on the Los Angeles County property roll as “Professional services building”, AIN 2519010002. The roll records 3,378 sq ft of building area, a 2019 build year and an assessed value of $981,147. 1 active business locations at this address appear in public records.
Public record — 1 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| GUARDIA SECURITY SERVICES INC | — | Jan 2013 | LA business tax registry | address match · high |
Los Angeles County assessment roll
Parcel record
| Field | Value |
|---|---|
| AIN | 2519010002 |
| Site address | 504 N MACLAY AVE |
| Land use (DOR) | 1910 — Professional services building |
| Building area (actual) | 3,378 sq ft |
| Floors / units / buildings | — / 1 / 1 |
| Lot size | — |
| Year built | 2019 |
| Zoning (primary) | — |
| Land value | $452,627 |
| Building value | — |
| Total assessed value | $981,147 |
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
- 504 N MACLAY AVE
- City
- San Fernando
- ZIP
- 91340
- Coordinates
- 34.28759, -118.43492
Within ~650 m
Nearby office buildings
- 321 N MACLAY AVE1 tenants
8,680 sq ft · 1951
- 403 N MACLAY AVE0 tenants
7,140 sq ft · 1980
- 807 N MACLAY AVE0 tenants
5,007 sq ft · 1982
- 439 N MACLAY AVE0 tenants
4,481 sq ft · 1973
- 330 N MACLAY AVE0 tenants
4,278 sq ft · 1997
- 501 N MACLAY AVE0 tenants
3,320 sq ft · 1948
How does 504 N MACLAY AVE compare with other Los Angeles office buildings?
At 3,378 sq ft, 504 N MACLAY AVE is less than a fifth 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 $290 per square foot of building area, against $306 across all office floor area on the roll.
Does the owner of 504 N MACLAY AVE 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 “Professional Building” mean for this parcel?
The Los Angeles County roll classifies AIN 2519010002 as “Professional Building” (use code 1910). 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 504 N MACLAY AVE?
Los Angeles County's published roll does not include owner names, so no owner is shown.
What companies have offices at 504 N MACLAY AVE?
1 active business locations at this building appear in Los Angeles County public records, including GUARDIA SECURITY SERVICES INC. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 504 N MACLAY AVE?
The Los Angeles County roll records 3,378 sq ft of building area, a build year of 2019.
What is the assessed value of 504 N MACLAY AVE?
$981,147 on the Los Angeles County roll. Assessed values are taxable-roll figures, not market prices.
What is the AIN for 504 N MACLAY AVE?
AIN 2519010002, site address 504 N MACLAY AVE, San Fernando. It is the key to look the parcel up in the County Assessor annual roll (Los Angeles County).
More around 504 N MACLAY AVE
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 2519010002.
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, “504 N MACLAY AVE, San Fernando, CA (AIN 2519010002)”, https://buildingcensus.com/offices/la/office-building-e1ce9652 (data as of September 20, 2026).