# 350 Gramatan Avenue, Mount Vernon School in Mount Vernon, New York. It covers 68,863 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 350 Gramatan Avenue, Mount Vernon. School in Mount Vernon, New York. Property ID sp5psayz3qtpkka. ## Facts **Facts about 350 Gramatan Avenue, Mount Vernon** | Fact | Value | Source | | --- | --- | --- | | Address | 350 Gramatan Avenue, Mount Vernon, NY 10552 | [Overture Maps addresses](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Building type | School | [USA Structures and SkyPSI estimator](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Footprint | 68,863 square feet | [USA Structures](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Perimeter | 1,420.77 feet | [USA Structures](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Height | 93.6 feet | [USGS 3D Elevation Program](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Height survey year | 2019 | [USGS 3D Elevation Program](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Stories | 7 stories | [USGS 3D Elevation Program](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Exterior wall area | 132,987 square feet | [SkyPSI estimator](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Parcel number | 550800165.46-1098-7 | [County and state public records](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#how-we-know) | | Land use | 612 Schools | [County and state public records](https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/#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) | $11,500 | $21,500 | $36,000 | | Facade wash with mold or growth treatment | $17,500 | $32,000 | $55,000 | **Exterior soft wash from a boom lift and by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash, conventional access | $21,500 | $39,000 | $65,000 | ### Window cleaning **Window cleaning by drone, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows only | $4,500 | $8,500 | $14,500 | | Windows inside and out | $7,000 | $14,500 | $26,000 | **Window cleaning by rope access, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Exterior windows, rope access | $29,000 | $58,000 | $101,000 | | Windows inside and out, rope access | $32,000 | $63,500 | $112,500 | ## Best method - [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Drone has the lowest cost, most likely $21,500. - [Window cleaning](https://skypsi.com/estimates/window-cleaning/): Drone has the lowest cost, most likely $8,500. ## Similar buildings nearby - [50 East 1st Street, Mount Vernon](https://skypsi.com/property/ny/new-york/sp4jn24f7jenx7z-50-east-1st-street-mount-vernon/) - [14 West 1st Street, Mount Vernon](https://skypsi.com/property/ny/new-york/spadyp60ye8kkh9-14-west-1st-street-mount-vernon/) - [121 South 6th Avenue, Mount Vernon](https://skypsi.com/property/ny/new-york/sp7fd3eyf1rf175-121-south-6th-avenue-mount-vernon/) - [177 Pondfield Road, Bronxville](https://skypsi.com/property/ny/new-york/spdv8fc2nckg3kv-177-pondfield-road-bronxville/) - [28 Franklin Place, Pelham](https://skypsi.com/property/ny/new-york/spw8jvwgyha6akj-28-franklin-place-pelham/) - [3750 Baychester Avenue, Bronx](https://skypsi.com/property/ny/new-york/sp4qwxay450m0df-3750-baychester-avenue-bronx/) - [921 East 228 Street, Bronx](https://skypsi.com/property/ny/new-york/spp2zgkthz5jbmd-921-east-228-street-bronx/) - [65 Siwanoy Boulevard, Eastchester](https://skypsi.com/property/ny/new-york/sp2684y4synnvkd-65-siwanoy-boulevard-eastchester/) ## 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. - [Overture Maps addresses](https://docs.overturemaps.org/attribution/): Street addresses from the Overture Maps addresses theme. - [SkyPSI estimator](https://skypsi.com/estimates/methodology/sources-and-licensing/): SkyPSI's own price model, calibrated rates and building-class rules. - [USGS 3D Elevation Program](https://www.usgs.gov/3d-elevation-program): Lidar elevation data that gives building heights where other sources have none. 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 addresses, SkyPSI estimator, USGS 3D Elevation Program. 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/ Addresses: Overture Maps Foundation, overturemaps.org (addresses theme), including the U.S. Department of Transportation National Address Database (NAD). https://docs.overturemaps.org/attribution/ Building heights from the U.S. Geological Survey 3D Elevation Program (public domain). https://www.usgs.gov/3d-elevation-program Page: https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon/ JSON: https://skypsi.com/property/ny/new-york/sp5psayz3qtpkka-350-gramatan-avenue-mount-vernon.json Content license: https://skypsi.com/content-license.txt