50 West 66Th Street, 9C, Manhattan 10023

This property may be subject to NYC’s non-primary residence (pied-à-terre) surcharge.

Photo of 50 West 66Th Street, 9C
© Mapillary contributors
Market value (FY27)
$1,208,390
Estimated annual surcharge
If non-primary, est. $48,335/yr · 4.0% tier (Class 2, $1M–$3M)
Owner of record
Kirk, Nathaniel Thayer
Borough
Manhattan
Block / Lot
1118 / 1243
BBL (PARID)
1011181243
Tax class
2
Building class
R4
Apartment
9C
Condo number
103250

Estimate = phase-1 rate × FY27 DOF market value. Co-op unit values are imputed by DOF at determination; see methodology.

Ownership records

Last deed recorded April 29, 2026 for $9,053,199. West 66th Sponsor LLC → Kirk, Nathaniel Thayer; Mistretta Kirk, Laura

  • Seller West 66th Sponsor LLC
    c/o: Extell Development Company, New York, NY 10022
  • Buyer Kirk, Nathaniel Thayer
    50 West 66th Street, Apt. 9C, New York, NY 10023
  • Buyer Mistretta Kirk, Laura
    50 West 66th Street, Apt. 9C, New York, NY 10023

Public ACRIS deed records and HPD registration data. LLC officers are not published by New York State; parties and addresses shown are as recorded.