# 128 South 4th Avenue, Mount Vernon Office in Mount Vernon, New York. It covers 17,669 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 128 South 4th Avenue, Mount Vernon. Office in Mount Vernon, New York. Property ID spbjpgsv4grp4dq. ## Facts **Facts about 128 South 4th Avenue, Mount Vernon** | Fact | Value | Source | | --- | --- | --- | | Address | 128 South 4th Avenue, Mount Vernon, NY 10550 | [USA Structures](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Building type | Office | [USA Structures and SkyPSI estimator](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Footprint | 17,669 square feet | [USA Structures](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Perimeter | 722.68 feet | [USA Structures](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Height | 38.52 feet | [USGS 3D Elevation Program](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Height survey year | 2019 | [USGS 3D Elevation Program](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Stories | 3 stories | [USGS 3D Elevation Program](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Exterior wall area | 27,836 square feet | [SkyPSI estimator](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Parcel number | 550800165.78-3088-10 | [County and state public records](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/#how-we-know) | | Land use | 681 Cultural facilities | [County and state public records](https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-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 from a boom lift, whole building** | Service | Low | Most likely | High | | --- | --- | --- | --- | | Facade wash, conventional access | $5,000 | $8,500 | $14,500 | ## Best method - [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Boom lift fits this building, most likely $8,500. ## Similar buildings nearby - [110 South 4th Avenue, Mount Vernon](https://skypsi.com/property/ny/new-york/spcek8xrr92rcp9-110-south-4th-avenue-mount-vernon/) - [10 West 3rd Street, Mount Vernon](https://skypsi.com/property/ny/new-york/sp098331b5rped3-10-west-3rd-street-mount-vernon/) - [29 East 2nd Street, Mount Vernon](https://skypsi.com/property/ny/new-york/sp1h0a5cmvycsht-29-east-2nd-street-mount-vernon/) - [132 South 2nd Avenue, Mount Vernon](https://skypsi.com/property/ny/new-york/sp19d0e7gy5hvd4-132-south-2nd-avenue-mount-vernon/) - [125 South 2nd Avenue, Mount Vernon](https://skypsi.com/property/ny/new-york/sp284vd1qeydadg-125-south-2nd-avenue-mount-vernon/) - [32 South 5th Avenue, Mount Vernon](https://skypsi.com/property/ny/new-york/spcgrs9rpp38g9d-32-south-5th-avenue-mount-vernon/) - [161 South 2nd Avenue, Mount Vernon](https://skypsi.com/property/ny/new-york/spkbak28gz4pjj5-161-south-2nd-avenue-mount-vernon/) - [267 South 4th Avenue, Mount Vernon](https://skypsi.com/property/ny/new-york/spfnagprh6khht6-267-south-4th-avenue-mount-vernon/) ## 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. - [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, SkyPSI estimator, USGS 3D Elevation Program. 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 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/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon/ JSON: https://skypsi.com/property/ny/new-york/spbjpgsv4grp4dq-128-south-4th-avenue-mount-vernon.json Content license: https://skypsi.com/content-license.txt