5501-19 CHESTNUT ST
OFF BLD N/COM W/PKG MASON · Philadelphia · 19139
At a glance
5501-19 CHESTNUT ST in Philadelphia, PA is listed on the Philadelphia property roll as “OFF BLD N/COM W/PKG MASON”, OPA account 883078400. The roll records 16,991 sq ft of building area, 1 floors, a 1981 build year and an assessed value of $2,052,800. 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 |
|---|---|---|---|---|
| NORTHEAST TREATMENT SERVICES INC | — | Mar 2013 | Philadelphia L&I licence | folio match · high |
Philadelphia assessment roll
Parcel record
| Field | Value |
|---|---|
| OPA account | 883078400 |
| Site address | 5501-19 CHESTNUT ST |
| Land use (DOR) | DE0 — OFF BLD N/COM W/PKG MASON |
| Building area (actual) | 16,991 sq ft |
| Floors / units / buildings | 1 / — / — |
| Lot size | — |
| Year built | 1981 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $2,052,800 |
Recorded owner (assessment roll)
PHILADELPHIA SUBURBAN DEV
Owner mailing address: 100 ROSS RD, KING OF PRUSSIA, PA, 19406
9 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
- 5501-19 CHESTNUT ST
- City
- Philadelphia
- ZIP
- 19139
- Coordinates
- 39.95954, -75.23148
Within ~650 m
Nearby office buildings
- 5740-60 MARKET ST0 tenants
47,200 sq ft · 2 fl · 1940
- 5548-54 CHESTNUT ST1 tenants
45,460 sq ft · 2 fl · 1940
- 5429-55 CHESTNUT ST2 tenants
15,680 sq ft · 1900
- 104-06 S 52ND ST1 tenants
8,968 sq ft · 2 fl · 1915
- 5219 MARKET ST0 tenants
8,000 sq ft · 4 fl · 1925
- 5600-14 CHESTNUT ST0 tenants
6,914 sq ft · 1 fl · 2012
How does 5501-19 CHESTNUT ST compare with other Philadelphia office buildings?
At 16,991 sq ft, 5501-19 CHESTNUT ST is about half 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 $121 per square foot of building area, against $163 across all office floor area on the roll.
Does the owner of 5501-19 CHESTNUT ST hold other Philadelphia office property?
9 Philadelphia office properties (9 parcels, 462.3K 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 “OFF BLD N/COM W/PKG MASON” mean for this parcel?
The Philadelphia roll classifies OPA account 883078400 as “OFF BLD N/COM W/PKG MASON” (use code DE0). 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 5501-19 CHESTNUT ST?
The recorded owner on the Philadelphia assessment roll (current) is PHILADELPHIA SUBURBAN DEV. Owner mailing address on file: 100 ROSS RD, KING OF PRUSSIA, PA, 19406.
What companies have offices at 5501-19 CHESTNUT ST?
1 active business locations at this building appear in Philadelphia public records, including NORTHEAST TREATMENT SERVICES INC. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 5501-19 CHESTNUT ST?
The Philadelphia roll records 16,991 sq ft of building area, 1 floors, a build year of 1981.
What is the assessed value of 5501-19 CHESTNUT ST?
$2,052,800 on the Philadelphia roll. Assessed values are taxable-roll figures, not market prices.
What is the OPA account for 5501-19 CHESTNUT ST?
OPA account 883078400, site address 5501-19 CHESTNUT ST, Philadelphia. It is the key to look the parcel up in the Office of Property Assessment nightly roll (Philadelphia).
More around 5501-19 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 883078400.
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, “5501-19 CHESTNUT ST, Philadelphia, PA (OPA account 883078400)”, https://buildingcensus.com/offices/philly/office-building-ecdeb37f (data as of October 10, 2026).