# 4421 6 Avenue, Brooklyn Retail in Brooklyn, New York. It covers 16,367 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 4421 6 Avenue, Brooklyn. Retail in Brooklyn, New York. Property ID spb1xa7hpn8cy2f. ## Facts **Facts about 4421 6 Avenue, Brooklyn** | Fact | Value | Source | | --- | --- | --- | | Address | 4421 6 Avenue, Brooklyn, NY 11220 | [USA Structures](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Building type | Retail | [USA Structures and SkyPSI estimator](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Place name | 456 Corner Grocery & Deli | [Overture Maps places](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Place type | grocery store | [Overture Maps places](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Footprint | 16,367 square feet | [USA Structures](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Perimeter | 775.09 feet | [USA Structures](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Height | 56.43 feet | [Overture Maps building footprints and Google Open Buildings](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Stories | 4 stories | [Overture Maps building footprints and Google Open Buildings](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Exterior wall area | 39,456 square feet | [SkyPSI estimator](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Parcel number | 3007400006 | [County and state public records](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Land use | 02 Multi-Family Walk-Up Buildings (class C1) | [County and state public records](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Year built | 1910 | [County and state public records](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Stories on the parcel record | 4 stories | [County and state public records](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#how-we-know) | | Building area on the parcel record | 15,000 square feet | [County and state public records](https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/#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) | $4,000 | $7,000 | $12,000 | | Facade wash with mold or growth treatment | $6,000 | $10,500 | $18,500 | **Exterior soft wash from a boom lift and by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash, conventional access | $7,000 | $13,000 | $21,500 | ### Window cleaning **Window cleaning by drone, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows only | $1,500 | $3,000 | $5,000 | | Windows inside and out | $2,500 | $5,000 | $8,500 | **Window cleaning by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows, rope access | $9,500 | $19,500 | $33,500 | | Windows inside and out, rope access | $10,500 | $21,000 | $37,500 | ## Best method - [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Drone has the lowest cost, most likely $7,000. - [Window cleaning](https://skypsi.com/estimates/window-cleaning/): Drone has the lowest cost, most likely $3,000. ## Similar buildings nearby - [4619 6 Avenue, Brooklyn](https://skypsi.com/property/ny/new-york/sp7p2ft65gmfnfj-4619-6-avenue-brooklyn/) - [4516 7 Avenue, Brooklyn](https://skypsi.com/property/ny/new-york/sph0kab28wrwgws-4516-7-avenue-brooklyn/) - [4501 5 Avenue, Brooklyn](https://skypsi.com/property/ny/new-york/spfpb9aa1zq7fg4-4501-5-avenue-brooklyn/) - [4521 7 Avenue, Brooklyn](https://skypsi.com/property/ny/new-york/sp66td1m5jrgn16-4521-7-avenue-brooklyn/) - [4706 7 Avenue, Brooklyn](https://skypsi.com/property/ny/new-york/spyxdgswq9s64h6-4706-7-avenue-brooklyn/) - [4720 7 Ave, Brooklyn](https://skypsi.com/property/ny/new-york/sptsypsjs502g03-4720-7-ave-brooklyn/) - [484 43 Street, Brooklyn](https://skypsi.com/property/ny/new-york/spheajb8hhhyyaa-484-43-street-brooklyn/) - [4601 5 Avenue, Brooklyn](https://skypsi.com/property/ny/new-york/sp065qvmn0e3mea-4601-5-avenue-brooklyn/) ## 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. - [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. - [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, Google Open Buildings, Overture Maps building footprints, 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/ 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/ 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/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn/ JSON: https://skypsi.com/property/ny/new-york/spb1xa7hpn8cy2f-4421-6-avenue-brooklyn.json Content license: https://skypsi.com/content-license.txt