3500 FAIRMOUNT AVE
OFF BLD N/PKG N/COM MAS+O · Philadelphia · 19104
At a glance
3500 FAIRMOUNT AVE in Philadelphia, PA is listed on the Philadelphia property roll as “OFF BLD N/PKG N/COM MAS+O”, OPA account 886770800. The roll records 13,471 sq ft of building area, a 2010 build year and an assessed value of $1,167,900.
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.
Philadelphia assessment roll
Parcel record
| Field | Value |
|---|---|
| OPA account | 886770800 |
| Site address | 3500 FAIRMOUNT AVE |
| Land use (DOR) | DD1 — OFF BLD N/PKG N/COM MAS+O |
| Building area (actual) | 13,471 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | — |
| Year built | 2010 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $1,167,900 |
Recorded owner (assessment roll)
PHILADELPHIA HOUSING AUTH
Owner mailing address: 2013 RIDGE AVE, PHILADELPHIA, PA, 19121
3 Philadelphia office properties share this owner mailing address →
Commercial property is usually held one building per entity; a shared mailbox is how the roll reveals a portfolio. It is evidence of common ownership, not proof.
Location
- Address
- 3500 FAIRMOUNT AVE
- City
- Philadelphia
- ZIP
- 19104
- Coordinates
- 39.96571, -75.19430
Within ~650 m
Nearby office buildings
- 3748 LANCASTER AVE3 tenants
31,500 sq ft · 4 fl · 2025
- 3509 SPRING GARDEN ST0 tenants
28,583 sq ft · 1920
- 3828-30 LANCASTER AVE1 tenants
4,278 sq ft · 1915
- 3417 SPRING GARDEN ST0 tenants
3,699 sq ft · 3 fl · 1920
- 3821 POWELTON AVE1 tenants
3,672 sq ft · 1 fl · 1950
- 3507 HAVERFORD AVE0 tenants
1,275 sq ft · 1 fl · 1950
How does 3500 FAIRMOUNT AVE compare with other Philadelphia office buildings?
At 13,471 sq ft, 3500 FAIRMOUNT AVE is about 63% smaller than the average office building on the Philadelphia roll, which comes to 36,284 sq ft across 2,470 buildings.
Its assessed value works out to $87 per square foot of building area, against $163 across all office floor area on the roll.
Does the owner of 3500 FAIRMOUNT AVE hold other Philadelphia office property?
3 Philadelphia office properties (3 parcels, 58.6K sq ft) are recorded to an owner sharing this parcel's tax-bill mailing address. A shared mailing address is evidence of common ownership, not proof of it.
What does “OFF BLD N/PKG N/COM MAS+O” mean for this parcel?
The Philadelphia roll classifies OPA account 886770800 as “OFF BLD N/PKG N/COM MAS+O” (use code DD1). 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 3500 FAIRMOUNT AVE?
The recorded owner on the Philadelphia assessment roll (current) is PHILADELPHIA HOUSING AUTH. Owner mailing address on file: 2013 RIDGE AVE, PHILADELPHIA, PA, 19121.
What companies have offices at 3500 FAIRMOUNT AVE?
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 3500 FAIRMOUNT AVE?
The Philadelphia roll records 13,471 sq ft of building area, a build year of 2010.
What is the assessed value of 3500 FAIRMOUNT AVE?
$1,167,900 on the Philadelphia roll. Assessed values are taxable-roll figures, not market prices.
What is the OPA account for 3500 FAIRMOUNT AVE?
OPA account 886770800, site address 3500 FAIRMOUNT AVE, Philadelphia. It is the key to look the parcel up in the Office of Property Assessment nightly roll (Philadelphia).
More around 3500 FAIRMOUNT AVE
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- Philadelphia — Office of Property Assessment nightly roll (owner and mailing address on every parcel), Department of Records deed transfers with consideration and counterparties, and L&I business licences joined by OPA account. The universal Commercial Activity licence roll publishes no premises addresses, so occupancy shows regulated activities only.
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: Philadelphia assessment roll, OPA account 886770800.
About this data
Source: Office of Property Assessment nightly roll (Philadelphia), as published October 10, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “3500 FAIRMOUNT AVE, Philadelphia, PA (OPA account 886770800)”, https://buildingcensus.com/offices/philly/office-building-3590f6d1 (data as of October 10, 2026).