# 20 Sealey Avenue, Hempstead Apartments in Hempstead, New York. It covers 1,450 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 20 Sealey Avenue, Hempstead. Apartments in Hempstead, New York. Property ID sp1rbzbs0k454dt. ## Facts **Facts about 20 Sealey Avenue, Hempstead** | Fact | Value | Source | | --- | --- | --- | | Address | 20 Sealey Avenue, Hempstead, NY 11550 | [Overture Maps addresses](https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead/#how-we-know) | | Building type | Apartments | [USA Structures and SkyPSI estimator](https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead/#how-we-know) | | Footprint | 1,450 square feet | [USA Structures](https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead/#how-we-know) | | Perimeter | 154.17 feet | [USA Structures](https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead/#how-we-know) | | Stories | 3 stories | [SkyPSI estimator](https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead/#how-we-know) | | Parcel number | 282013-34.-178-22 | [County and state public records](https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead/#how-we-know) | | Land use | 430 - Motor Vehicle Services | [County and state public records](https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead/#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 | $500 | $1,500 | $2,000 | ## Best method - [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Boom lift fits this building, most likely $1,500. ## Similar buildings nearby - [303 Main Street, Hempstead](https://skypsi.com/property/ny/new-york/spmtpsms909my6g-303-main-street-hempstead/) - [100 Terrace Avenue, Hempstead](https://skypsi.com/property/ny/new-york/sptdxr1yg8v2dv0-100-terrace-avenue-hempstead/) - [300 Peninsula Boulevard, Hempstead](https://skypsi.com/property/ny/new-york/sp0tyyw0mtchw2f-300-peninsula-boulevard-hempstead/) - [50 Clinton Street, Hempstead](https://skypsi.com/property/ny/new-york/spjcecpqrdgcpfp-50-clinton-street-hempstead/) - [451 Fulton Avenue, Hempstead](https://skypsi.com/property/ny/new-york/spjn3a0p4px9gq6-451-fulton-avenue-hempstead/) - [111 Cherry Valley Avenue, Garden City](https://skypsi.com/property/ny/new-york/sp0a0t3we15fjb9-111-cherry-valley-avenue-garden-city/) - [130 Hempstead Avenue, West Hempstead](https://skypsi.com/property/ny/new-york/spswpfs48j9qtzk-130-hempstead-avenue-west-hempstead/) - [150 Old Country Road, Mineola](https://skypsi.com/property/ny/new-york/sptysg5get81w7y-150-old-country-road-mineola/) ## 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. 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. 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/ Page: https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead/ JSON: https://skypsi.com/property/ny/new-york/sp1rbzbs0k454dt-20-sealey-avenue-hempstead.json Content license: https://skypsi.com/content-license.txt