1,167,962tax lots, grouped by the decade their building was constructed — a physical record of the city's growth spurts, one-family rowhouse booms, and modern condo towers.
Switch metric, then click any decade tile below the chart to open it in the Property Explorer.
192,358 lots — dominated by one-family homes — went up in that single decade, the classic outer-borough rowhouse and bungalow building boom that still defines much of Queens, Brooklyn, and the Bronx today.
Browse 1920s-built propertiesEvery decade from the 1980s onward except the 1990s has condo as its single most common new property type — a structural shift from the prewar one/two-family and rental-apartment stock built earlier in the century.
See condo share in the treemap14 decades of data shown, plus an Unknown bucket for missing year-built records.