Each neighborhood receives a displacement risk score from 1–100, computed nightly from six public data signals. Methodology follows ANHD (Association for Neighborhood and Housing Development) displacement risk indicators.
Deed transfers to limited liability companies via ACRIS. LLC ownership is associated with speculative purchasing patterns and rapid rent increases. Financial institution transfers (mortgage servicers, foreclosure deeds) are excluded. Source: NYC ACRIS (bnx9-e6tj, 636b-3b5g, 8h5j-fqxa).
DOB building permit applications — renovation and alteration permits signal landlord investment that often precedes tenant displacement. Source: NYC Department of Buildings (Socrata ipu4-2q9a).
311 housing complaints (heat, hot water, pests, mold) per residential unit — a proxy for deteriorating conditions that precede forced moves. Source: NYC 311 (erm2-nwe9).
Residential evictions carried out by NYC marshals (executed evictions, not filings). Filed cases often resolve without execution — this signal tracks actual removals. OCA data lags executed date by 2–4 weeks. Source: NYC Open Data (6z8x-wfk4).
Year-over-year increase in NYC Department of Finance property assessment — a leading indicator of market pressure. Currently dormant — requires two consecutive years of DOF assessment history. Source: NYC Department of Finance (w7rz-68fs).
Year-over-year loss in rent-stabilized units per building via DHCR registration data. The single most direct signal of affordable housing erosion. Currently in data collection phase — signal becomes active after two consecutive annual snapshots. Source: DHCR Building Registrations (kj4p-ruqc).
Scores are normalized per residential unit using MapPLUTO unit counts to prevent bias toward dense commercial areas. All data is public record.