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KEYSTONE appears in the NYC deed record as 5 separate limited liability companies. Between them they have sold 5 buildings and hold none in the current record. The deeds run from December 18, 2025 to April 23, 2026. They sit in 3 ZIP codes.
Every company below appears as a seller of record under the KEYSTONE name. Each has its own deed ledger.
The buildings behind those companies, newest deed first. Prices on the priced deeds run from $3.4M to $9.2M.
The heaviest concentration is 11215 (Park Slope), with 3 buildings. Across the portfolio: Park Slope 11215 (3), West Village 10014 (1), Brooklyn Heights 11201 (1).
No building in this portfolio carries an executed marshal eviction in the citywide record. 21 residential units are recorded across the portfolio in the city's tax lot file, 3 of them carry a DHCR rent-stabilization registration in the most recent year on file, and 1 HPD and DOB violations are unresolved.
The same deeds name 280 Bleecker Street Owner LLC, 548 6th Owner LLC, Townhouse Rental II LLC, among 5 counterparties in all,. Each building came from its own selling company, which is the same one-building-one-LLC structure read from the other side.
When a company in this network records a new NYC purchase, it shows up in a weekly email. Quiet weeks send nothing.
Two independent things in the public record have to agree before KEYSTONE is treated as one group: a shared naming pattern across numbered siblings, and a shared mailing address on the deed filings. One signal alone is not enough, and roughly seven in ten shared-address groups fail the test and appear nowhere on this site. This is a documented link, not a finding about ownership. The deeds say these companies share a name and a mailing address. They do not say who controls them. The full method, and the other networks →
KEYSTONE is the name shared by 5 limited liability companies that appear as parties in the NYC deed record, having sold 5 buildings between them and holding none in the current record. The deed record shows the shared name and the shared filing address; it does not name the people behind the companies.
5 buildings across 5 companies. Every one has been sold on, so this family holds nothing in the current record: it is a portfolio that has already been unwound. Condominium unit deeds are collapsed to the building they sit in, so a whole-condo purchase does not read as a portfolio.
Holding each building in its own limited liability company is standard practice in New York: it separates liability between buildings, simplifies financing and makes a later sale cleaner. The side effect is that one owner appears in the public record as many unrelated names, which is what this page undoes.
A deed names a buyer of record. This page describes documents, not conduct, and makes no claim of wrongdoing. How PulseCities reads the record →