4001 CHESTNUT ST
STR/OFF 2 STY MASONRY · Philadelphia · 19104
At a glance
4001 CHESTNUT ST in Philadelphia, PA is listed on the Philadelphia property roll as “STR/OFF 2 STY MASONRY”, OPA account 882930805. The roll records 5,500 sq ft of building area, 2 floors, a 1925 build year and an assessed value of $2,241,600.
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 | 882930805 |
| Site address | 4001 CHESTNUT ST |
| Land use (DOR) | BB0 — STR/OFF 2 STY MASONRY |
| Building area (actual) | 5,500 sq ft |
| Floors / units / buildings | 2 / — / — |
| Lot size | — |
| Year built | 1925 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $2,241,600 |
Recorded owner (assessment roll)
O A P INC
Owner mailing address: 3101 WALNUT ST, PHILADELPHIA, PA, 19104
2 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
- 4001 CHESTNUT ST
- City
- Philadelphia
- ZIP
- 19104
- Coordinates
- 39.95591, -75.20237
Within ~650 m
Nearby office buildings
- 3711L MARKET ST0 tenants
356,362 sq ft · 14 fl · 2015
- 3722-46 MARKET ST0 tenants
165,000 sq ft · 1993
- 4145 CHESTNUT ST2 tenants
130,754 sq ft · 7 fl · 2024
- 3711 MARKET ST0 tenants
122,390 sq ft · 1 fl · 2010
- 3801-15 MARKET ST1 tenants
120,000 sq ft · 3 fl · 1950
- 30 N 41ST ST0 tenants
98,000 sq ft · 6 fl · 2012
How does 4001 CHESTNUT ST compare with other Philadelphia office buildings?
At 5,500 sq ft, 4001 CHESTNUT 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 $408 per square foot of building area, against $163 across all office floor area on the roll.
Does the owner of 4001 CHESTNUT ST hold other Philadelphia office property?
2 Philadelphia office properties (2 parcels, 35K sq ft) are recorded to 2 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 “STR/OFF 2 STY MASONRY” mean for this parcel?
The Philadelphia roll classifies OPA account 882930805 as “STR/OFF 2 STY MASONRY” (use code BB0). 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 4001 CHESTNUT ST?
The recorded owner on the Philadelphia assessment roll (current) is O A P INC. Owner mailing address on file: 3101 WALNUT ST, PHILADELPHIA, PA, 19104.
What companies have offices at 4001 CHESTNUT ST?
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 4001 CHESTNUT ST?
The Philadelphia roll records 5,500 sq ft of building area, 2 floors, a build year of 1925.
What is the assessed value of 4001 CHESTNUT ST?
$2,241,600 on the Philadelphia roll. Assessed values are taxable-roll figures, not market prices.
What is the OPA account for 4001 CHESTNUT ST?
OPA account 882930805, site address 4001 CHESTNUT ST, Philadelphia. It is the key to look the parcel up in the Office of Property Assessment nightly roll (Philadelphia).
More around 4001 CHESTNUT 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 882930805.
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, “4001 CHESTNUT ST, Philadelphia, PA (OPA account 882930805)”, https://buildingcensus.com/offices/philly/office-building-3bc05531 (data as of October 10, 2026).