4775 LEAGUE ISLAND BLVD
OFF BLD N/COM W/PKG MASON · Philadelphia · 19112
At a glance
4775 LEAGUE ISLAND BLVD in Philadelphia, PA is listed on the Philadelphia property roll as “OFF BLD N/COM W/PKG MASON”, OPA account 874900030. The roll records 28,032 sq ft of building area, a 2007 build year and an assessed value of $16,118,400. It last sold for $16,300,000 in Dec 2024. 1 active business locations at this address appear in public records.
Recorded transfers — county roll + state sale file
Sale history
| Recorded | Price | Qualification | Source | Instrument |
|---|---|---|---|---|
| Dec 2024 | $16,300,000 | not rated | County roll | — |
Prices are the consideration recorded in Philadelphia's public property records. Where a qualification code exists it is the assessor's judgement of whether a transfer was arm's length; transfers without one appear unrated rather than assumed clean. Whether a building is on the market today, and at what price, is not a public record and is not shown here — asking prices, listings and lease terms live in private commercial databases.
Public record — 1 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| PHILADELPHIA TECHNOLOGY PARK | — | Jul 2011 | Philadelphia L&I licence | folio match · high |
Philadelphia assessment roll
Parcel record
| Field | Value |
|---|---|
| OPA account | 874900030 |
| Site address | 4775 LEAGUE ISLAND BLVD |
| Land use (DOR) | DE0 — OFF BLD N/COM W/PKG MASON |
| Building area (actual) | 28,032 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | — |
| Year built | 2007 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $16,118,400 |
Recorded owner (assessment roll)
L/S 4775 LEAGUE ISLAND BL
Owner mailing address: 8 PENN CTR, PHILADELPHIA, PA, 19103
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
- 4775 LEAGUE ISLAND BLVD
- City
- Philadelphia
- ZIP
- 19112
- Coordinates
- 39.89258, -75.16497
Within ~650 m
Nearby office buildings
- 4499 S BROAD ST0 tenants
700,000 sq ft · 1895
- 300 ROUSE BLVD0 tenants
170,622 sq ft · 2 fl · 2021
- 1000 INTREPID AVE0 tenants
118,013 sq ft
- 201 ROUSE BLVD0 tenants
80,052 sq ft · 4 fl · 2012
- 351 ROUSE BLVD0 tenants
48,110 sq ft · 2017
- 4750 LEAGUE ISLAND BLVD1 tenants
39,112 sq ft · 3 fl · 2006
How does 4775 LEAGUE ISLAND BLVD compare with other Philadelphia office buildings?
At 28,032 sq ft, 4775 LEAGUE ISLAND BLVD is about 23% 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 $575 per square foot of building area, against $163 across all office floor area on the roll.
The last recorded sale priced it at $581 per square foot.
Does the owner of 4775 LEAGUE ISLAND BLVD hold other Philadelphia office property?
2 Philadelphia office properties (2 parcels, 78K 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 has happened at 4775 LEAGUE ISLAND BLVD recently?
1 recorded transfer is on file for this parcel, the latest dated Dec 2024.
What does “OFF BLD N/COM W/PKG MASON” mean for this parcel?
The Philadelphia roll classifies OPA account 874900030 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 4775 LEAGUE ISLAND BLVD?
The recorded owner on the Philadelphia assessment roll (current) is L/S 4775 LEAGUE ISLAND BL. Owner mailing address on file: 8 PENN CTR, PHILADELPHIA, PA, 19103.
What companies have offices at 4775 LEAGUE ISLAND BLVD?
1 active business locations at this building appear in Philadelphia public records, including PHILADELPHIA TECHNOLOGY PARK. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 4775 LEAGUE ISLAND BLVD?
The Philadelphia roll records 28,032 sq ft of building area, a build year of 2007.
What is the assessed value of 4775 LEAGUE ISLAND BLVD?
$16,118,400 on the Philadelphia roll. Assessed values are taxable-roll figures, not market prices.
When did 4775 LEAGUE ISLAND BLVD last sell?
The last recorded transfer was in Dec 2024 for $16,300,000 ($581 per square foot).
What is the OPA account for 4775 LEAGUE ISLAND BLVD?
OPA account 874900030, site address 4775 LEAGUE ISLAND BLVD, Philadelphia. It is the key to look the parcel up in the Office of Property Assessment nightly roll (Philadelphia).
More around 4775 LEAGUE ISLAND BLVD
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.
Working with Philadelphia office parcels? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
Dataset updated . Source: Philadelphia assessment roll, OPA account 874900030.
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, “4775 LEAGUE ISLAND BLVD, Philadelphia, PA (OPA account 874900030)”, https://buildingcensus.com/offices/philly/office-building-b2c5562d (data as of October 10, 2026).