1521-23 LOCUST ST
OFF BLD N/PKG N/COM MASON · Philadelphia · 19102
At a glance
1521-23 LOCUST ST in Philadelphia, PA is listed on the Philadelphia property roll as “OFF BLD N/PKG N/COM MASON”, OPA account 883045500. The roll records 51,110 sq ft of building area, 10 floors, a 1971 build year and an assessed value of $3,190,400. 5 active business locations at this address appear in public records.
Public record — 5 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| INOTIME INC | — | Apr 2014 | Philadelphia L&I licence | folio match · high |
| ADR 1521 LOCUST LP (C/O BRANDYWINE CONST MGMT) | — | Dec 2012 | Philadelphia L&I licence | folio match · high |
| SMYTHE'S CORNER CONDOMINUM ASSOC | — | Sep 2011 | Philadelphia L&I licence | folio match · high |
| KIBITZ ROOM RITTENHOUSE LLC (SCHLESINGER) | — | Aug 2010 | Philadelphia L&I licence | folio match · high |
| SCHLESINGER'S | — | May 2009 | Philadelphia L&I licence | folio match · high |
Philadelphia assessment roll
Parcel record
| Field | Value |
|---|---|
| OPA account | 883045500 |
| Site address | 1521-23 LOCUST ST |
| Land use (DOR) | DD0 — OFF BLD N/PKG N/COM MASON |
| Building area (actual) | 51,110 sq ft |
| Floors / units / buildings | 10 / — / — |
| Lot size | — |
| Year built | 1971 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $3,190,400 |
Recorded owner (assessment roll)
ADR 1521 LOCUST LP
Owner mailing address: 1845 WALNUT ST, PHILADELPHIA, PA, 19103
8 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
- 1521-23 LOCUST ST
- City
- Philadelphia
- ZIP
- 19102
- Coordinates
- 39.94877, -75.16721
Within ~650 m
Nearby office buildings
- 1500-42 MARKET ST7 tenants
2,215,276 sq ft · 43 fl · 1974
- One Liberty Place4 tenants
1,464,000 sq ft · 61 fl · 1986
- BNY Mellon Center6 tenants
1,449,928 sq ft · 54 fl · 1990
- 1700-40 MARKET ST7 tenants
1,183,616 sq ft · 32 fl · 1969
- 1818-28 MARKET ST3 tenants
1,143,040 sq ft · 40 fl · 1976
- 1400 JOHN F KENNEDY BLVD7 tenants
891,135 sq ft · 2015
How does 1521-23 LOCUST ST compare with other Philadelphia office buildings?
At 51,110 sq ft, 1521-23 LOCUST ST is about 41% larger than the average office building on the Philadelphia roll, which comes to 36,284 sq ft across 2,470 buildings.
With 10 floors it is one of 82 office buildings of ten or more floors in the metro.
Its assessed value works out to $62 per square foot of building area, against $163 across all office floor area on the roll.
Does the owner of 1521-23 LOCUST ST hold other Philadelphia office property?
8 Philadelphia office properties (8 parcels, 672.2K sq ft) are recorded to 8 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/PKG N/COM MASON” mean for this parcel?
The Philadelphia roll classifies OPA account 883045500 as “OFF BLD N/PKG N/COM MASON” (use code DD0). 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 1521-23 LOCUST ST?
The recorded owner on the Philadelphia assessment roll (current) is ADR 1521 LOCUST LP. Owner mailing address on file: 1845 WALNUT ST, PHILADELPHIA, PA, 19103.
What companies have offices at 1521-23 LOCUST ST?
5 active business locations at this building appear in Philadelphia public records, including INOTIME INC, ADR 1521 LOCUST LP (C/O BRANDYWINE CONST MGMT), SMYTHE'S CORNER CONDOMINUM ASSOC, KIBITZ ROOM RITTENHOUSE LLC (SCHLESINGER), SCHLESINGER'S. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 1521-23 LOCUST ST?
The Philadelphia roll records 51,110 sq ft of building area, 10 floors, a build year of 1971.
What is the assessed value of 1521-23 LOCUST ST?
$3,190,400 on the Philadelphia roll. Assessed values are taxable-roll figures, not market prices.
What is the OPA account for 1521-23 LOCUST ST?
OPA account 883045500, site address 1521-23 LOCUST ST, Philadelphia. It is the key to look the parcel up in the Office of Property Assessment nightly roll (Philadelphia).
More around 1521-23 LOCUST ST
- Philadelphia office buildings· 2,470 buildings
- 1635 LOCUST ASSOCIATES LL· 8 properties
- INOTIME INC· tenant on record
- ADR 1521 LOCUST LP (C/O BRANDYWINE CONST MGMT)· tenant on record
- SMYTHE'S CORNER CONDOMINUM ASSOC· tenant on record
- KIBITZ ROOM RITTENHOUSE LLC (SCHLESINGER)· tenant on record
- Federal office leases in PA
- Office census — all metros
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 883045500.
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, “1521-23 LOCUST ST, Philadelphia, PA (OPA account 883045500)”, https://buildingcensus.com/offices/philly/office-building-b4bc2604 (data as of October 10, 2026).