21 East 31 Street

Owner: Williams Equities

Debt: February 20, 2026, $60 million

Built: 1916

Renovated: 2008

SF: 255,447

Dwelling units: 0

No. of buildings: 2

Class: Office with Comm — 7 to 19 stories (O6)

Floors: 16

Transactions:

• Williams Equities borrowed $60 million from Citibank for 136 Madison Avenue, Park Avenue South, Manhattan on February 20, 2026.

Development:

• Frank Lasusa filed major alteration job 121573476 for 241,728 sqft B building in Park Avenue South, Manhattan, on March 28, 2013.

• Luis Iglesias Jr. filed alteration job M01206909 for 12,000 sqft B building with 0 apartments in Park Avenue South, Manhattan, on September 23, 2025.

• Luis Iglesias Jr. filed alteration job M01239154 for 11,700 sqft B building with 0 apartments in Park Avenue South, Manhattan, on June 26, 2025.

• Luis Iglesias Jr. filed alteration job M01103206 for 1 sqft B building with 0 apartments in Park Avenue South, Manhattan, on October 14, 2024.

• Luis Iglesias Jr. filed alteration job M01099686 for 1 sqft B building with 0 apartments in Park Avenue South, Manhattan, on October 01, 2024.

• Luis Iglesias Jr. filed alteration job M01103204 for 1 sqft B building with 0 apartments in Park Avenue South, Manhattan, on September 27, 2024.

Violations:

According to city public data, the properties have received $1,650 in OATH penalties in the last year.