309 W MOUNT PLEASANT AVE
STR/OFF 1 STY MASONRY · Philadelphia · 19119
At a glance
309 W MOUNT PLEASANT AVE in Philadelphia, PA is listed on the Philadelphia property roll as “STR/OFF 1 STY MASONRY”, OPA account 881000541. The roll records 18,423 sq ft of building area and an assessed value of $1,789,600.
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 | 881000541 |
| Site address | 309 W MOUNT PLEASANT AVE |
| Land use (DOR) | BA0 — STR/OFF 1 STY MASONRY |
| Building area (actual) | 18,423 sq ft |
| Floors / units / buildings | — / — / — |
| Lot size | — |
| Year built | — |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $1,789,600 |
Recorded owner (assessment roll)
HP MOUNT PLEASANT REALTY LLC
Owner mailing address: 741 PERRINEVILLE RD, PERRINEVILLE, NJ, 08535
Location
- Address
- 309 W MOUNT PLEASANT AVE
- City
- Philadelphia
- ZIP
- 19119
- Coordinates
- 40.05408, -75.19464
Within ~650 m
Nearby office buildings
- 7112 GERMANTOWN AVE0 tenants
15,354 sq ft · 2 fl · 1935
- 7146-50 GERMANTOWN AVE1 tenants
4,118 sq ft · 3 fl · 1930
- 7152 GERMANTOWN AVE1 tenants
2,921 sq ft · 2 fl · 1915
- 333 W MOUNT PLEASANT AVE0 tenants
2,634 sq ft · 1 fl · 1998
- 301 W MOUNT PLEASANT AVE1 tenants
2,025 sq ft · 1 fl · 1930
- 7113 EMLEN ST0 tenants
1,921 sq ft · 1890
How does 309 W MOUNT PLEASANT AVE compare with other Philadelphia office buildings?
At 18,423 sq ft, 309 W MOUNT PLEASANT AVE 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 $97 per square foot of building area, against $163 across all office floor area on the roll.
What does “STR/OFF 1 STY MASONRY” mean for this parcel?
The Philadelphia roll classifies OPA account 881000541 as “STR/OFF 1 STY MASONRY” (use code BA0). 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 309 W MOUNT PLEASANT AVE?
The recorded owner on the Philadelphia assessment roll (current) is HP MOUNT PLEASANT REALTY LLC. Owner mailing address on file: 741 PERRINEVILLE RD, PERRINEVILLE, NJ, 08535.
What companies have offices at 309 W MOUNT PLEASANT AVE?
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 309 W MOUNT PLEASANT AVE?
The Philadelphia roll records 18,423 sq ft of building area.
What is the assessed value of 309 W MOUNT PLEASANT AVE?
$1,789,600 on the Philadelphia roll. Assessed values are taxable-roll figures, not market prices.
What is the OPA account for 309 W MOUNT PLEASANT AVE?
OPA account 881000541, site address 309 W MOUNT PLEASANT AVE, Philadelphia. It is the key to look the parcel up in the Office of Property Assessment nightly roll (Philadelphia).
More around 309 W MOUNT PLEASANT AVE
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 881000541.
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, “309 W MOUNT PLEASANT AVE, Philadelphia, PA (OPA account 881000541)”, https://buildingcensus.com/offices/philly/office-building-4bfda97e (data as of October 10, 2026).