20 Sidney Place

Owner: Benjamin Kornblum

Debt: February 04, 2026, $6 million

Built: 1838

SF: 12,024

Dwelling units: 25

No. of buildings: 1

Class: Over Six Families Without Stores (C1)

Floors: 4

HPD Ownership Registration Information

Last registered: 2025-09-06 (expires 2026-09-01)

Transactions:

• Benjamin Kornblum borrowed $6 million from JPMorgan Chase for 20 Sidney Place, Brooklyn Heights, Brooklyn on February 04, 2026.

• Jack Kornblum borrowed $6.3 million from New York Community Bank for 20 Sidney Place, Brooklyn Heights, Brooklyn on January 27, 2021.

Development:

• Narinder Kaur filed alteration job B00418757 for 2,000 sqft building with 25 apartments in Brooklyn Heights, Brooklyn, on October 27, 2020.

• Benjamin Kornblum filed alteration job 340777680 for J-2 building with 25 apartments in Brooklyn Heights, Brooklyn, on October 19, 2020.

• Benjamin Kornblum filed alteration job 340770561 for RES building with 26 apartments in Brooklyn Heights, Brooklyn, on September 29, 2020.

• Jack Kornblum filed alteration job 340768208 for RES building with 26 apartments in Brooklyn Heights, Brooklyn, on September 22, 2020.

• Benjamin Kornblum filed alteration job 340762222 for RES building with 26 apartments in Brooklyn Heights, Brooklyn, on September 02, 2020.

Violations:

According to city public data, the properties have received $5,000 in OATH penalties in the last year.

Latest Stories:

• Jack Kornblum refis $6M with New York Community for 25-unit rental in Brooklyn Heights (January 28, 2021)