67.3% of NYC tax lots are individually owned — but they hold only 40.7%of citywide value. Most of the city's property wealth sits with a comparatively small number of entity owners.
These are conservative floors, not ceilings.Entity owner-groups here are built by exact repeated-name matching only — a common NYC ownership structure is a unique single-building holding-company LLC, which never gets grouped and is invisible to the top-N leaderboards below (it's still correctly counted as "LLC" in the aggregate splits, just not linked to any other property). True corporate concentration is almost certainly higher than what these numbers show.
Government agencies dominate the tracked top — private ownership is far more fragmented under the exact-name-match method
Manhattan (43.3% of value) is by far the highest — Staten Island (7.7%) the lowest
16 tracked entity groups individually control more than $1 billion in NYC property value each — a mix of major government agencies and the largest commercial real estate holders in the city.
61 tracked entity groups clear the $100M threshold — still a small fraction of the 3,282 total tracked groups, underscoring how concentrated even the "tracked" population is.
Owner-group ranking uses only rows with a resolved owner_group_id (entity-only per OWNER_CONSOLIDATION_METHODOLOGY.md — never Individual or Unknown/Other). Government/private-entity/individual split uses all rows regardless of grouping, bucketed purely by owner_entity_type (a classification, never a name).