800 W OLNEY AVE
OFF BLD N/COM W/PKG MASON · Philadelphia · 19120
At a glance
800 W OLNEY AVE in Philadelphia, PA is listed on the Philadelphia property roll as “OFF BLD N/COM W/PKG MASON”, OPA account 883085700. The roll records 11,232 sq ft of building area, 2 floors, a 1965 build year and an assessed value of $1,210,900.
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 | 883085700 |
| Site address | 800 W OLNEY AVE |
| Land use (DOR) | DE0 — OFF BLD N/COM W/PKG MASON |
| Building area (actual) | 11,232 sq ft |
| Floors / units / buildings | 2 / — / — |
| Lot size | — |
| Year built | 1965 |
| Zoning (primary) | — |
| Land value | — |
| Building value | — |
| Total assessed value | $1,210,900 |
Recorded owner (assessment roll)
800 WEST OLNEY ASSOCIATES
Owner mailing address: 249 MORRIS RD, HARLEYSVILLE, PA, 19438
Location
- Address
- 800 W OLNEY AVE
- City
- Philadelphia
- ZIP
- 19120
- Coordinates
- 40.03663, -75.13551
Within ~650 m
Nearby office buildings
- 534-42 W OLNEY AVE0 tenants
9,504 sq ft · 2 fl · 1925
- 5616-18 N 5TH ST0 tenants
5,314 sq ft · 2 fl · 1950
- 5217-23 N LAWRENCE ST0 tenants
3,600 sq ft · 1 fl · 1986
- 5236 N 11TH ST0 tenants
2,750 sq ft · 2 fl · 1935
- 5429 N 5TH ST0 tenants
2,544 sq ft · 2 fl · 1900
- 5427 N 5TH ST0 tenants
2,544 sq ft · 2 fl · 1900
How does 800 W OLNEY AVE compare with other Philadelphia office buildings?
At 11,232 sq ft, 800 W OLNEY AVE is about 69% 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 $108 per square foot of building area, against $163 across all office floor area on the roll.
What does “OFF BLD N/COM W/PKG MASON” mean for this parcel?
The Philadelphia roll classifies OPA account 883085700 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 800 W OLNEY AVE?
The recorded owner on the Philadelphia assessment roll (current) is 800 WEST OLNEY ASSOCIATES. Owner mailing address on file: 249 MORRIS RD, HARLEYSVILLE, PA, 19438.
What companies have offices at 800 W OLNEY 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 800 W OLNEY AVE?
The Philadelphia roll records 11,232 sq ft of building area, 2 floors, a build year of 1965.
What is the assessed value of 800 W OLNEY AVE?
$1,210,900 on the Philadelphia roll. Assessed values are taxable-roll figures, not market prices.
What is the OPA account for 800 W OLNEY AVE?
OPA account 883085700, site address 800 W OLNEY AVE, Philadelphia. It is the key to look the parcel up in the Office of Property Assessment nightly roll (Philadelphia).
More around 800 W OLNEY 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 883085700.
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, “800 W OLNEY AVE, Philadelphia, PA (OPA account 883085700)”, https://buildingcensus.com/offices/philly/office-building-4b4e334f (data as of October 10, 2026).