Novarly Parcel
Frequently asked questions
Is my house sinking?
Most homes are on stable ground, but parts of many US metros are measurably subsiding — often from groundwater changes, soft fill, or historic land reclamation. Enter your address on our homepage for a free screening based on satellite radar measurements.
How can a satellite possibly measure millimetres?
InSAR compares the phase of radar pulses across hundreds of satellite passes over years. Phase shifts reveal ground motion far smaller than the radar wavelength. It is peer-reviewed science used worldwide to monitor dams, mines, bridges, and volcanoes.
What does a red or amber result mean?
It means ground within 150 m of the address has been measured moving downward notably fast (amber: 3-10 mm/yr, red: over 10 mm/yr). It does not mean the building is damaged — it means the ground context deserves a professional look. Share the report with a licensed geotechnical engineer.
My result says "no measurement available." Is that good news?
Neither good nor bad. Radar needs reflective surfaces (roofs, pavement); vegetated lots, brand-new construction, and water return no reliable measurement. Absence of data is not evidence of stability, and we will never pretend otherwise.
Does "green" guarantee my property is safe?
No. Green means no notable ground motion was measured nearby in the satellite record. Localized issues smaller than the measurement grid, drainage problems, or structural matters are invisible to any satellite. A screening informs — it never replaces — professional advice.
Why does ground sink at all?
Common causes: groundwater extraction, compaction of soft sediments and landfill, historic marshland or coastal reclamation, drainage of organic soils, and in some regions glacial isostatic adjustment — the slow ongoing response of the crust since the last ice age.
Which cities do you cover?
New York City and Long Island are live today. More US metros are coming — check any address and join the waitlist if your area is not covered yet.
What do I get in the paid report?
The measured rate at and around your address, the worst motion within 150 m, how it compares to the whole metro, your FEMA flood zone, a plain-English explanation written for non-experts, and a downloadable PDF you can share with a surveyor, engineer, or attorney.