4104 WALNUT ST
OFF BLD COM NO GAR MASON · Philadelphia · 19104
At a glance
4104 WALNUT ST in Philadelphia, PA is listed on the Philadelphia property roll as “OFF BLD COM NO GAR MASON”, OPA account 773580050. The roll records 4,473 sq ft of building area, a 1910 build year and an assessed value of $339,900. 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 |
|---|---|---|---|---|
| UNIVERSITY OF PENNA TRUSTEES | — | Jun 2015 | Philadelphia L&I licence | folio match · high |
Philadelphia assessment roll
Parcel record
| Field | Value |
|---|---|
| OPA account | 773580050 |
| Site address | 4104 WALNUT ST |
| Land use (DOR) | DB0 — OFF BLD COM NO GAR MASON |
| Building area (actual) | 4,473 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | — |
| Year built | 1910 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $339,900 |
Recorded owner (assessment roll)
TR UNIV OF PENNA
Owner mailing address: 3451 WALNUT ST, PHILADELPHIA, PA, 19104
4 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
- 4104 WALNUT ST
- City
- Philadelphia
- ZIP
- 19104
- Coordinates
- 39.95410, -75.20573
Within ~650 m
Nearby office buildings
- 4145 CHESTNUT ST2 tenants
130,754 sq ft · 7 fl · 2024
- 30 N 41ST ST0 tenants
98,000 sq ft · 6 fl · 2012
- 3926-38 CHESTNUT ST1 tenants
63,654 sq ft · 1966
- 4415 CHESTNUT ST2 tenants
57,300 sq ft · 5 fl · 2022
- 4023-27 CHESTNUT ST0 tenants
53,340 sq ft · 1896
- 4224 MARKET ST0 tenants
44,155 sq ft · 2 fl · 1960
How does 4104 WALNUT ST compare with other Philadelphia office buildings?
At 4,473 sq ft, 4104 WALNUT ST is less than a fifth the size of 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 $76 per square foot of building area, against $163 across all office floor area on the roll.
Does the owner of 4104 WALNUT ST hold other Philadelphia office property?
4 Philadelphia office properties (4 parcels, 89K sq ft) are recorded to 3 owner entities 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 COM NO GAR MASON” mean for this parcel?
The Philadelphia roll classifies OPA account 773580050 as “OFF BLD COM NO GAR MASON” (use code DB0). 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 4104 WALNUT ST?
The recorded owner on the Philadelphia assessment roll (current) is TR UNIV OF PENNA. Owner mailing address on file: 3451 WALNUT ST, PHILADELPHIA, PA, 19104.
What companies have offices at 4104 WALNUT ST?
1 active business locations at this building appear in Philadelphia public records, including UNIVERSITY OF PENNA TRUSTEES. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 4104 WALNUT ST?
The Philadelphia roll records 4,473 sq ft of building area, a build year of 1910.
What is the assessed value of 4104 WALNUT ST?
$339,900 on the Philadelphia roll. Assessed values are taxable-roll figures, not market prices.
What is the OPA account for 4104 WALNUT ST?
OPA account 773580050, site address 4104 WALNUT ST, Philadelphia. It is the key to look the parcel up in the Office of Property Assessment nightly roll (Philadelphia).
More around 4104 WALNUT ST
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 773580050.
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, “4104 WALNUT ST, Philadelphia, PA (OPA account 773580050)”, https://buildingcensus.com/offices/philly/office-building-e5475fff (data as of October 10, 2026).