# 4021 J St, Philadelphia Apartments in Philadelphia, Pennsylvania. It covers 11,923 square feet on the ground. Rates calibrated October 2, 2026. Review by December 31, 2026. Updated October 30, 2026. Method propdata-estimator-v6. ## This building 4021 J St, Philadelphia. Apartments in Philadelphia, Pennsylvania. Property ID spfqg04tmw3f35p. ## Facts **Facts about 4021 J St, Philadelphia** | Fact | Value | Source | | --- | --- | --- | | Address | 4021 J St, Philadelphia, PA | [County and state public records](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | | Building type | Apartments | [USA Structures and SkyPSI estimator](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | | Footprint | 11,923 square feet | [USA Structures](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | | Perimeter | 825.84 feet | [USA Structures](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | | Height | 28.97 feet | [Overture Maps building footprints and Google Open Buildings](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | | Stories | 3 stories | [Overture Maps building footprints and Google Open Buildings](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | | Exterior wall area | 23,924 square feet | [SkyPSI estimator](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | | Parcel number | 332244800 | [County and state public records](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | | Land use | SINGLE FAMILY - ROW B/GAR 2 STY MASONRY | [County and state public records](https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/#how-we-know) | ## Cost ranges Whole-building ranges from the SkyPSI estimator, calibrated October 2, 2026. Grade C: modelled from the Texas calibration. [What the grades mean](https://skypsi.com/estimates/methodology/confidence-grades/). ### Exterior soft wash **Exterior soft wash from a boom lift, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash, conventional access | $3,500 | $6,500 | $11,000 | ## Best method - [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Boom lift fits this building, most likely $6,500. ## Similar buildings nearby - [3950 D St, Philadelphia](https://skypsi.com/property/pa/philadelphia/spt5m2xrmz1sf7v-3950-d-st-philadelphia/) - [4676 Darrah St, Philadelphia](https://skypsi.com/property/pa/philadelphia/spxnbz3ksmabnpe-4676-darrah-st-philadelphia/) - [3921 N 5th St, Philadelphia](https://skypsi.com/property/pa/philadelphia/spghd59e352k8w3-3921-n-5th-st-philadelphia/) - [1900 N 9th St, Philadelphia](https://skypsi.com/property/pa/philadelphia/sp582b11beysmc4-1900-n-9th-st-philadelphia/) - [810 N Hancock St, Philadelphia](https://skypsi.com/property/pa/philadelphia/spf8q46dqng1k68-810-n-hancock-st-philadelphia/) - [900 N 9th St, Philadelphia](https://skypsi.com/property/pa/philadelphia/sptcsj3syt8yzyy-900-n-9th-st-philadelphia/) - [625 E Wister St, Philadelphia](https://skypsi.com/property/pa/philadelphia/sprajkxtgmwtemn-625-e-wister-st-philadelphia/) - [7400 E Roosevelt Blvd, Philadelphia](https://skypsi.com/property/pa/philadelphia/spvs7x6ts3s0dwd-7400-e-roosevelt-blvd-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](https://skypsi.com/estimates/methodology/sources-and-licensing/): Situs addresses, parcel numbers, land use, year built and floor counts from county appraisal districts and state open data. - [USA Structures](https://disasters.geoplatform.gov/USA_Structures/): Building footprints, heights and occupancy from FEMA's USA Structures. - [Google Open Buildings](https://sites.research.google/open-buildings/): Building outlines and heights from Google Open Buildings, reached through the Overture Maps buildings theme. - [Overture Maps building footprints](https://opendatacommons.org/licenses/odbl/1-0/): Building outlines, heights and floor counts from the Overture Maps buildings theme. - [SkyPSI estimator](https://skypsi.com/estimates/methodology/sources-and-licensing/): 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](https://skypsi.com/estimates/methodology/how-a-skyestimate-is-built/). [Request a Quote](https://skypsi.com/request-a-quote) --- Sources: County and state public records, USA Structures, Google Open Buildings, Overture Maps building footprints, SkyPSI estimator. Parcel and address facts from county appraisal districts and state open-data programs (public records). https://skypsi.com/estimates/methodology/sources-and-licensing/ Building footprints: USA Structures, FEMA Response Geospatial Office, Oak Ridge National Laboratory and U.S. Geological Survey (CC BY 4.0). https://disasters.geoplatform.gov/USA_Structures/ Building data from Google Open Buildings, reached through Overture Maps Foundation, overturemaps.org. https://sites.research.google/open-buildings/ Building footprints from Overture Maps Foundation, including OpenStreetMap contributors, Microsoft, Esri Community Maps contributors and USGS, under the Open Database License (ODbL). https://opendatacommons.org/licenses/odbl/1-0/ Page: https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia/ JSON: https://skypsi.com/property/pa/philadelphia/spfqg04tmw3f35p-4021-j-st-philadelphia.json Content license: https://skypsi.com/content-license.txt