# 51 21 Street, Astoria School in Astoria, New York. It covers 30,162 square feet on the ground. Rates calibrated October 2, 2026. Review by December 31, 2026. Updated October 27, 2026. Method propdata-estimator-v6. ## This building 51 21 Street, Astoria. School in Astoria, New York. Property ID spn7hx1ka8zttgp. ## Facts **Facts about 51 21 Street, Astoria** | Fact | Value | Source | | --- | --- | --- | | Address | 51 21 Street, Astoria, NY 11106 | [USA Structures](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Building type | School | [USA Structures and SkyPSI estimator](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Place name | I.s. 126 | [Overture Maps places](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Place type | education | [Overture Maps places](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Footprint | 30,162 square feet | [USA Structures](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Perimeter | 1,130.7 feet | [USA Structures](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Height | 65.62 feet | [USA Structures](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Stories | 5 stories | [USA Structures](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Exterior wall area | 74,193 square feet | [SkyPSI estimator](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Parcel number | 4005530001 | [County and state public records](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Land use | 08 Public Facilities & Institutions (class W1) | [County and state public records](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Year built | 1924 | [County and state public records](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Stories on the parcel record | 5 stories | [County and state public records](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#how-we-know) | | Building area on the parcel record | 108,500 square feet | [County and state public records](https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/#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 by drone, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash (drone) | $6,500 | $12,000 | $20,000 | | Facade wash with mold or growth treatment | $9,500 | $17,500 | $30,500 | **Exterior soft wash from a boom lift and by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash, conventional access | $12,000 | $21,500 | $36,000 | ### Window cleaning **Window cleaning by drone, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows only | $2,500 | $5,000 | $8,000 | | Windows inside and out | $4,000 | $8,000 | $14,500 | **Window cleaning by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows, rope access | $16,000 | $32,000 | $56,000 | | Windows inside and out, rope access | $17,500 | $35,500 | $62,500 | ## Best method - [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Drone has the lowest cost, most likely $12,000. - [Window cleaning](https://skypsi.com/estimates/window-cleaning/): Drone has the lowest cost, most likely $5,000. ## Similar buildings nearby - [42 Broadway, Astoria](https://skypsi.com/property/ny/new-york/spm5r6pabaspczw-42-broadway-astoria/) - [30 Broadway, Astoria](https://skypsi.com/property/ny/new-york/spv2vbpmkcwn4pq-30-broadway-astoria/) - [12 30 Road, Astoria](https://skypsi.com/property/ny/new-york/sp4asbm2af0y3vx-12-30-road-astoria/) - [50 33 Road, Astoria](https://skypsi.com/property/ny/new-york/sp4fxs5fnpwseae-50-33-road-astoria/) - [22 30 Road, Astoria](https://skypsi.com/property/ny/new-york/sp97jp7d9nprnn3-22-30-road-astoria/) - [36 33 Road, Astoria](https://skypsi.com/property/ny/new-york/sph78qjkyqycsxk-36-33-road-astoria/) - [66 33 Road, Astoria](https://skypsi.com/property/ny/new-york/spt8fhwa1n4h3mh-66-33-road-astoria/) - [10 33 Road, Astoria](https://skypsi.com/property/ny/new-york/sp7jjwjfpaqzfym-10-33-road-astoria/) ## 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://comptroller.texas.gov/taxes/property-tax/): 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. - [Overture Maps places](https://docs.overturemaps.org/attribution/): Business and place names from the Overture Maps places 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, Overture Maps places, SkyPSI estimator. Parcel and address facts from county appraisal districts and state open-data programs (public records). https://comptroller.texas.gov/taxes/property-tax/ 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/ Business names: Overture Maps Foundation, overturemaps.org (places theme, CDLA Permissive 2.0). https://docs.overturemaps.org/attribution/ Page: https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria/ JSON: https://skypsi.com/property/ny/new-york/spn7hx1ka8zttgp-51-21-street-astoria.json Content license: https://skypsi.com/content-license.txt