Market data & owner guides
What the NYC sales market is actually doing, measured from live listings and recorded sales - plus the practical background an owner needs to read those records themselves.
Market data
Nearly half of listings in some NYC neighborhoods cut their asking price. Price-cut rates and typical discount size by neighborhood, from live listing data.
Median days on market for NYC apartments by borough and neighborhood, measured from live listing data rather than brokerage marketing claims.
How much do NYC sellers actually concede? The median gap between first asking price and sale price, and how often apartments sell below ask.
Owner guide
The Borough-Block-Lot number NYC uses to identify every tax lot - and the key that ties a building's sales, permits, violations, and assessments together.
A walkthrough of NYC's public property register: deeds, parties, consideration amounts, and the traps that make ACRIS prices misleading.
A step-by-step method for picking comparable sales that actually reflect your apartment, and the adjustments that matter.