Novarly Parcel · New York, NY
Is your New York building sinking?
Satellites have measured New York's ground to the millimetre: across 291,380 grid cells, the fastest-sinking spot moves 30.2 mm/yr. Check any New York-area address for free.
| Measured grid cells | 291,380 |
| Median ground motion | 1.1 mm/yr downward |
| Fastest-sinking cell | 30.2 mm/yr |
| Cells at notable rates (≤ −3 mm/yr) | 2.3% |
Satellite InSAR measurements on a ~100 m screening grid (negative = sinking). Sources: Ohenhen et al. InSAR VLM datasets (CC0/CC-BY); contains modified Copernicus Sentinel-1 data. Data updated 2026-07-23.
Screening only — not a structural guarantee. For any decision, consult a licensed geotechnical engineer.
Neighborhood deep-dives:
Is New York sinking?
Parts of it, measurably. Across 291,380 satellite-measured grid cells in the New York metro, the median ground motion is 1.1 mm/yr downward, the fastest-sinking cell measures 30.2 mm/yr, and 2.3% of measured cells exceed the 3 mm/yr "notable" threshold. Motion varies block by block — check your specific address.
How do you measure ground motion in New York?
InSAR: radar satellites (Copernicus Sentinel-1) compare the phase of millions of radar returns across years of passes, revealing millimetre-scale vertical land motion. The data comes from peer-reviewed research (Ohenhen et al., Nature Cities 2025 and related datasets) and is screened on a ~100 m grid.
What should New York buyers and owners do with this?
Use the free screening for the measured rates around any address. An amber or red result is context for a professional conversation — share the report with a licensed geotechnical engineer or structural surveyor. A green result means no notable motion was measured nearby; it is not a guarantee.