113 Amity Street
Cobble Hill, Brooklyn
Parcel ID (BBL): 3002900013
Owner: Rockrose Development
Acquired: February 18, 2026, $100 million
Built: 1900
Renovated: 2000
SF: 258,000
Dwelling units: 0
No. of buildings: 1
Class: Hospitals, Sanitariums, Mental Institutions (I1)
Floors: 5
Legacy BBLs: 3002900013.00000000
Transactions:
• SUNY Downstate Health Sciences University sold 340 Henry Street, Cobble Hill, Brooklyn for $100 million to Rockrose Development on February 18, 2026.
Development:
• Rockrose Development filed major alteration job B01375952 for 298,322 sqft 56 building with 0 apartments in Cobble Hill, Brooklyn, on April 10, 2026.
• Kenneth Holden filed major alteration job 320146980 for 742,671 sqft B building in Cobble Hill, Brooklyn, on April 06, 2010.
• Peter Donohoe filed alteration job B01456637 for 1 sqft building with 0 apartments in Cobble Hill, Brooklyn, on September 09, 2026.
• Peter Donohoe filed alteration job B01456635 for 4,600 sqft building with 0 apartments in Cobble Hill, Brooklyn, on September 09, 2026.
• Peter Donohoe filed alteration job B01415741 for 314,628 sqft building with 0 apartments in Cobble Hill, Brooklyn, on August 07, 2026.
• Peter Donohoe filed alteration job B01436307 for 314,628 sqft building with 0 apartments in Cobble Hill, Brooklyn, on July 27, 2026.
• Andrew Mcguire filed alteration job B01434903 for 1,625 sqft building with 1 apartments in Cobble Hill, Brooklyn, on July 23, 2026.
Litigation:
• Fortis Property Group filed a $1 million lawsuit 517473/2025 against SUNY Downstate Health Sciences University on May 28, 2025,seeking a judgment related to contractat 340 Henry Street.
Violations:
According to city public data, the properties have received 10 DOB violations in the last year.