Property record
4521 Longshore Ave, Philadelphia
School in Philadelphia, Pennsylvania. It covers 19,393 square feet on the ground.
This building
4521 Longshore Ave, Philadelphia. School in Philadelphia, Pennsylvania. Property ID spzkbffjea9ps6b.
Facts
| Fact | Value | Source |
|---|---|---|
| Address | 4521 Longshore Ave, Philadelphia, PA | County and state public records |
| Building type | School | USA Structures and SkyPSI estimator |
| Place name | Keystone Academy Charter School | Overture Maps places |
| Place type | school | Overture Maps places |
| Footprint | 19,393 square feet | USA Structures |
| Perimeter | 841.25 feet | USA Structures |
| Height | 28.38 feet | USA Structures |
| Stories | 2 stories | USA Structures |
| Exterior wall area | 23,874 square feet | SkyPSI estimator |
| Parcel number | 778221000 | County and state public records |
| Land use | COMMERCIAL - SCHOOL 3 STY MASONRY+OTH | County and state public records |
Cost ranges
Whole-building ranges from the SkyPSI estimator, calibrated October 2, 2026. Grade C: modelled from the Texas calibration. What the grades mean.
Exterior soft wash
| Service | Low | Most likely | High |
|---|---|---|---|
| Facade wash, conventional access | $3,500 | $6,500 | $11,000 |
Best method
- Exterior soft wash: Boom lift fits this building, most likely $6,500.
Similar buildings nearby
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- 6801 Cottage St, Philadelphia
- 6801 Cottage St, Philadelphia
How we know
Each fact names the source it comes from. A building file carries the source of each field, and SkyPSI shows that source beside the fact.
- County and state public records: Situs addresses, parcel numbers, land use, year built and floor counts from county appraisal districts and state open data.
- USA Structures: Building footprints, heights and occupancy from FEMA's USA Structures.
- Overture Maps places: Business and place names from the Overture Maps places theme.
- SkyPSI estimator: SkyPSI's own price model, calibrated rates and building-class rules.
Cost ranges come from the SkyPSI estimator, calibrated October 2, 2026. How a SkyEstimate is built.
Ask SkyPSI for a quote on your building.
Request a QuoteSources: County and state public records, USA Structures, Overture Maps places, SkyPSI estimator.
An estimate, not a quote. How a SkyEstimate is built.