Rockrose Development
Rockrose Development is a real estate development and management company in New York. The firm was originally founded by the Elghanayan brothers in 1970, and was focused on brownstone renovation in Greenwich Village.
Later, the firm's activities broadened to new apartment construction, leasing, sales and marketing, large-scale rehabilitation, major office development, and investments and acquisitions. Rockrose's investment partners have included Credit Suisse, Goldman Sachs, and other high profile funds and institutions.
Over the five decades to 2020, Rockrose has acquired, developed or repositioned nearly 6 million square feet of office space and approximately 15,000 residential apartments in New York and Washington, DC.
In 2009, the company experienced a major split, as former heads and brothers H. Henry Elghanayan, K. Thomas Elghanayan and Frederick Elghanayan divided their holdings between Rockrose (which Henry Elghanayan continues to lead with his son Justin) and TF Cornerstone, a new firm started by Thomas and Frederick Elghanayan.
Major Rockrose-retained properties post-split include 100 Jane Street, 41 River Terrace and 200 Water Street.
Rockrose took on its first major project in Brooklyn in 2020 with the purchase of a development site at 98 DeKalb Avenue on the border of Fort Greene and Downtown Brooklyn.
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15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700

15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700

15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700

15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700

15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700

15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700

15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700

15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700

15 East 26th Street, 7th Floor, New York, NY, (212) 847-3700
15 East 26th Street, 7th Floor, New York, NY, 212.847.3700
15 East 26th Street, 7th Floor, New York, NY, 212.847.3700
15 East 26th Street, 7th Floor, New York, NY, 212.847.3700
15 East 26th Street, 7th Floor, New York, NY, 212.847.3700
15 East 26th Street, 7th Floor, New York, NY, 212.847.3700
15 East 26th Street, 7th Floor, New York, NY, 212.847.3700
- Event Sales
- Address 27-34 Jackson Avenue
- Neighborhood Long Island City
- Borough Queens
- Square feet 3,137
- Price $ 26,000,000
- Publication Date 02/14/2020
- Event Date 02/14/2020
- Party 1 Cab Management
- Party 2 Rockrose Development
- Event Retail Leasing
- Address 27-10 43rd Avenue
- Neighborhood Long Island City
- Borough Queens
- Square feet 1,800
- Publication Date 01/31/2020
- Event Date 01/31/2020
- Party 1 Rockrose Development
- Party 1 Brokerage Ripco
- Party 1 Broker Eric Fisher
- Party 2 Tacombi
- Party 2 Brokerage Level Group
- Party 2 Broker Michael Greenberg, Larry Link
- Event Office Leasing
- Address 11 East 26th Street
- Neighborhood Flatiron
- Borough Manhattan
- Square feet 24,166
- Publication Date 02/11/2019
- Event Date 02/05/2019
- Party 1 Rockrose Development
- Party 1 Brokerage Adams & Company
- Party 1 Broker James Buslik, Jeff Buslik
- Party 2 Butterfly Network
- Party 2 Brokerage CBRE
- Party 2 Broker Meghan Allen, Patrice Meagher
- Event Financing
- Address 410 West 53rd Street
- Neighborhood Clinton
- Borough Manhattan
- Square feet 166,518
- Price $ 71,400,000
- Publication Date 08/27/2018
- Event Date 08/24/2018
- Party 1 Rockrose Development
- Party 2 Wells Fargo, Fannie Mae
- Event Financing
- Address 43-25 Hunter Street
- Neighborhood Long Island City
- Borough Queens
- Square feet 681,188
- Price $ 348,000,000
- Publication Date 07/09/2018
- Event Date 07/06/2018
- Party 1 Rockrose Development
- Party 2 New York State Housing Finance Agency
- Event Retail Leasing
- Address 152 Christopher Street
- Neighborhood West Village
- Borough Manhattan
- Square feet 12,450
- Publication Date 05/07/2018
- Event Date 04/19/2018
- Party 1 Rockrose Development
- Party 1 Brokerage Rockrose Development
- Party 1 Broker Patricia Dunphy
- Party 2 Peloton
- Party 2 Brokerage Newmark Knight Frank
- Party 2 Broker Ben Birnbaum, Ben Shapiro
- Event Office Leasing
- Address 300 Park Avenue South
- Neighborhood Flatiron
- Borough Manhattan
- Square feet 13,700
- Publication Date 03/26/2018
- Event Date 03/19/2018
- Party 1 Rockrose Development
- Party 1 Brokerage Cushman & Wakefield
- Party 1 Broker Rob Fink, Andrew Braver
- Party 2 Swavelle Mill Creek Fabrics
- Party 2 Brokerage Newmark Knight Frank
- Party 2 Broker Eric Zemachson, Cory Borg
- Event Financing
- Address 43-22 Queens Street
- Neighborhood Long Island City
- Borough Queens
- Square feet 320,820
- Price $ 255,000,000
- Publication Date 06/01/2017
- Event Date 04/17/2017
- Party 1 Rockrose Development
- Party 2 Bank of America
- Event Financing
- Address 100 Jane Street
- Neighborhood West Village
- Borough Manhattan
- Price $ 65,000,000
- Publication Date 08/01/2016
- Event Date 06/17/2016
- Party 1 Rockrose Development
- Party 2 Wells Fargo
- Event Retail Leasing
- Address 26-25 Jackson Avenue
- Neighborhood Long Island City
- Borough Queens
- Square feet 2,000
- Publication Date 07/01/2016
- Event Date 05/15/2016
- Party 1 Rockrose Development
- Party 1 Brokerage Rockrose Development
- Party 1 Broker Patricia Dunphy
- Party 2 Shih Li
- Event Retail Leasing
- Address 26-25 Jackson Avenue
- Neighborhood Long Island City
- Borough Queens
- Square feet 940
- Publication Date 07/01/2016
- Event Date 05/15/2016
- Party 1 Rockrose Development
- Party 1 Brokerage Rockrose Development
- Party 1 Broker Patricia Dunphy
- Party 2 Levante
- Party 2 Brokerage Modern Spaces
- Party 2 Broker Troy Allen
- Event Retail Leasing
- Address 26-25 Jackson Avenue
- Neighborhood Long Island City
- Borough Queens
- Square feet 2,000
- Publication Date 07/01/2016
- Event Date 05/15/2016
- Party 1 Rockrose Development
- Party 1 Brokerage Rockrose Development
- Party 1 Broker Patricia Dunphy
- Party 2 Shih Li
- Event Retail Leasing
- Address 26-25 Jackson Avenue
- Neighborhood Long Island City
- Borough Queens
- Square feet 2,000
- Publication Date 07/01/2016
- Event Date 05/18/2016
- Party 1 Rockrose Development
- Party 1 Brokerage Rockrose Development
- Party 1 Broker Patricia Dunphy
- Party 2 Shih Li
- Event Retail Leasing
- Address 666 Greenwich Street
- Neighborhood West Village
- Borough Manhattan
- Square feet 14,000
- Publication Date 04/01/2016
- Event Date 02/15/2016
- Party 1 Rockrose Development
- Party 1 Brokerage Rockrose Development
- Party 1 Broker Patricia Dunphy
- Party 2 Brooklyn Fare
- Party 2 Brokerage Rockrose Development
- Party 2 Broker Patricia Dunphy
- Event Office Leasing
- Address 300 Park Avenue South
- Neighborhood Flatiron
- Borough Manhattan
- Square feet 41,000
- Publication Date 10/01/2015
- Event Date 08/22/2015
- Party 1 Rockrose Development
- Party 1 Brokerage Cushman & Wakefield
- Party 1 Broker Mikal Nahmias
- Party 2 FanDuel
- Party 2 Brokerage Colliers International
- Party 2 Broker Robert Kennedy
- Event Office Leasing
- Address 99 John Street
- Neighborhood Seaport
- Borough Manhattan
- Square feet 8,200
- Publication Date 09/01/2015
- Event Date 07/23/2015
- Party 1 Rockrose Development
- Party 1 Brokerage Winick Realty Group
- Party 1 Broker Darrell Rubens, Lee Block
- Party 2 Smarter Toddler
- Party 2 Brokerage Heller Organization
- Event Retail leasing
- Address 666 Greenwich Street
- Neighborhood West Village
- Borough Manhattan
- Square feet 12,000
- Publication Date 06/01/2015
- Event Date 04/22/2015
- Party 1 Rockrose Development
- Party 2 Brooklyn Fare
- Event Retail Leasing
- Address 135 John Street
- Neighborhood Financial District
- Borough Manhattan
- Square feet 1,100
- Publication Date 08/01/2012
- Event Date 06/22/2012
- Party 1 Rockrose Development
- Party 1 Brokerage In-house
- Party 2 Starbucks
- Party 2 Brokerage SCG Retail
- Party 2 Broker David Firestein
- Event Office Leasing
- Address 300 Park Avenue
- Neighborhood Plaza District
- Borough Manhattan
- Square feet 20,000
- Price per foot $ 51.00
- Publication Date 12/01/2011
- Event Date 10/22/2011
- Party 1 Rockrose Development
- Party 1 Brokerage Cushman & Wakefield
- Party 1 Broker Andrew Peretz, John Peters, Mike Nahmias
- Party 2 William Grant & Sons
- Party 2 Brokerage Newmark Grubb Knight Frank
- Party 2 Broker Eric Cagner
- Event Office Leasing
- Address 300 Park Avenue
- Neighborhood Plaza District
- Borough Manhattan
- Square feet 13,000
- Publication Date 07/01/2011
- Event Date 05/22/2011
- Party 1 Rockrose Development
- Party 1 Brokerage Cushman & Wakefield
- Party 1 Broker Mike Nahmias, Andrew Peretz, John Peters
- Party 2 Experian Hitwise
- Party 2 Brokerage JLL
- Party 2 Broker Paul Formichelli
- Event Office Leasing
- Address 300 Park Avenue South
- Neighborhood Flatiron
- Borough Manhattan
- Square feet 26,974
- Publication Date 04/01/2011
- Event Date 02/20/2011
- Party 1 Rockrose Development
- Party 1 Brokerage Cushman & Wakefield
- Party 1 Broker John Peters, Mike Nahmias, Andrew Peretz
- Party 2 M Booth & Associates
- Party 2 Brokerage Grubb & Ellis
- Party 2 Broker Richard Rosenthal
- Event Office Leasing
- Address 300 Park Avenue South
- Neighborhood Flatiron
- Borough Manhattan
- Square feet 26,974
- Publication Date 03/01/2011
- Event Date 01/20/2011
- Party 1 Rockrose Development
- Party 2 M Booth and Associates
- Party 2 Brokerage Grubb & Ellis
- Party 2 Broker Richard Rosenthal
- Event Office Leasing
- Address 300 Park Avenue South
- Neighborhood Flatiron
- Borough Manhattan
- Square feet 27,000
- Publication Date 12/01/2010
- Event Date 10/22/2010
- Party 1 Rockrose Development
- Party 2 Whitney Museum of American Art
- Party 2 Brokerage Newmark Grubb Knight Frank
- Party 2 Broker Jason Greenstein
- Event Office Leasing
- Address 300 Park Avenue South
- Neighborhood Flatiron
- Borough Manhattan
- Square feet 25,300
- Price per foot $ 42.00
- Publication Date 11/01/2010
- Event Date 09/22/2010
- Party 1 Rockrose Development
- Party 1 Brokerage Cushman & Wakefield
- Party 1 Broker John Peters, Andrew Peretz
- Party 2 Leo Burnett
- Party 2 Brokerage Byrnam Wood
- Party 2 Broker Gordon Ogden
- Event Office Leasing
- Address 300 Park Avenue South
- Neighborhood Flatiron
- Borough Manhattan
- Publication Date 08/01/2010
- Event Date 06/22/2010
- Party 1 Rockrose Development
- Party 1 Brokerage Cushman & Wakefield
- Party 1 Broker Andrew Peretz, John Peters
- Party 2 Wilhelmina Models


Rockrose Development, ROCKROSE DEVELOPMENT CORP.
Rockrose Development, EAST COAST 6 L.L.C.
Rockrose Development, 99 JOHN ST, LLC
Rockrose Development, MIDTOWN WEST A LLC
ROCKROSE DEVELOPMENT, ROCKROSE GC MWB LLC
ARCHIVE PRESERVATIONC
Rockrose Development, EAST COAST 7 L.L.C.
LINC LIC L.L.C.
410 W 53 ST COMPANY
TRIBECA POINTE LLC
200 WATER SPE L.L.C.
110-114 HORATIO II L.
100 JANE STREET L P C
ROCKROSE DEVELOPMENT, 43-22 QUEENS STREET,LLC
ROCKROSE DEVELOPMENT, 2525 44TH DRIVE L.L.C.


Rockrose Development, ROCKROSE DEVELOPMENT CORP.
Rockrose Development, 99 JOHN ST, LLC
Rockrose Development, EAST COAST 7 L.L.C.
ROCKROSE DEVELOPMENT, 43-22 QUEENS STREET,LLC