# 21 Ralph Avenue, Babylon

Apartments in Babylon, New York. It covers 3,066 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

21 Ralph Avenue, Babylon. Apartments in Babylon, New York. Property ID sp97ex7w6kv6be0.

## Facts

**Facts about 21 Ralph Avenue, Babylon**

| Fact | Value | Source |
| --- | --- | --- |
| Address | 21 Ralph Avenue, Babylon, NY 11702 | [USA Structures](https://skypsi.com/property/ny/new-york/sp97ex7w6kv6be0-21-ralph-avenue-babylon/#how-we-know) |
| Building type | Apartments | [USA Structures and SkyPSI estimator](https://skypsi.com/property/ny/new-york/sp97ex7w6kv6be0-21-ralph-avenue-babylon/#how-we-know) |
| Footprint | 3,066 square feet | [USA Structures](https://skypsi.com/property/ny/new-york/sp97ex7w6kv6be0-21-ralph-avenue-babylon/#how-we-know) |
| Perimeter | 259.59 feet | [USA Structures](https://skypsi.com/property/ny/new-york/sp97ex7w6kv6be0-21-ralph-avenue-babylon/#how-we-know) |
| Stories | 3 stories | [SkyPSI estimator](https://skypsi.com/property/ny/new-york/sp97ex7w6kv6be0-21-ralph-avenue-babylon/#how-we-know) |
| Parcel number | 4720039.-1-24 | [County and state public records](https://skypsi.com/property/ny/new-york/sp97ex7w6kv6be0-21-ralph-avenue-babylon/#how-we-know) |
| Land use | 410 Living accommodations | [County and state public records](https://skypsi.com/property/ny/new-york/sp97ex7w6kv6be0-21-ralph-avenue-babylon/#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 | $1,500 | $2,500 | $4,000 |

## Best method

- [Exterior soft wash](https://skypsi.com/estimates/exterior-soft-wash/): Boom lift fits this building, most likely $2,500.

## Similar buildings nearby

- [10 Berkshire Road, West Babylon](https://skypsi.com/property/ny/new-york/sp40psqyaps4758-10-berkshire-road-west-babylon/)
- [510 West Montauk Highway, West Babylon](https://skypsi.com/property/ny/new-york/sphnef8nb2d8g3b-510-west-montauk-highway-west-babylon/)
- [111 Beach Drive, West Islip](https://skypsi.com/property/ny/new-york/sp2gyyjym6q33m3-111-beach-drive-west-islip/)
- [1370 Penataquit Avenue, Bay Shore](https://skypsi.com/property/ny/new-york/spse43fnc2wrctd-1370-penataquit-avenue-bay-shore/)
- [1350 Penataquit Avenue, Bay Shore](https://skypsi.com/property/ny/new-york/spshk5qfwz572e3-1350-penataquit-avenue-bay-shore/)
- [399 County Line Road, Amityville](https://skypsi.com/property/ny/new-york/sp6t0ppfjrbjrj9-399-county-line-road-amityville/)
- [400 County Line Road, Massapequa](https://skypsi.com/property/ny/new-york/spmx3sxb2sake9e-400-county-line-road-massapequa/)
- [70 Pinelawn Road, Melville](https://skypsi.com/property/ny/new-york/spr0p61k6h29fk7-70-pinelawn-road-melville/)

## 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.
- [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, 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/

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