Practice areas: Real Estate, Business & Corporate
Licensed in New York since: 2014
Education: Brooklyn Law School
Selected to Rising Stars: 2017 - 2026 Olshan Frome Wolosky LLP
1325 Avenue of the Americas15th Floor
New York, NY 10019 Phone: 212-451-2300 Email: Gregory H. Jaske Visit website
Details 
Gregory Jaske advises real estate developers, property owners and investors in sophisticated real estate matters.
Greg maintains a broad-based real estate practice that includes negotiating and structuring LLC and other joint ventures, acquisitions, purchase and sale agreements, development agreements, ground leasing and borrower-side financings.
With extensive experience in New York City and nationwide, Greg has guided clients through multimillion dollar joint venture agreements, representing both operators and investors in significant multifamily, commercial, and mixed-use properties and development projects. He also regularly counsels clients in telecommunications real estate matters, including data center development and leasing and rooftop facility leases, as well as tenant-side retail healthcare leasing. In addition, Greg has substantial experience in commercial real estate financing matters, from loans to purchases of co-lending interests and loan participations totaling billions of dollars in loan originations.
Greg frequently serves as lead counsel in high-stakes real estate matters, including representing a multi-billion-dollar family office in its negotiation of real estate joint ventures with sponsors for horizontal and vertical phases of development. Clients rely on him for his ability to structure and negotiate joint venture agreements, purchase and sale agreements, development agreements, property and asset management agreements, office and retail leases, telecom-related real estate agreements and real estate-related corporate matters.
Prior to joining Olshan, Greg worked at Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C. and other prominent New York law firms, where he handled a wide array of real estate matters, including complex joint ventures and development projects. He began his career as an analyst at a leading international financial services institution and a hedge fund.
Greg grew up and resides on Long Island. He enjoys spending family time skiing, hiking and exploring the Catskills.
First Admitted: 2014, New York
Professional Webpage: https://www.olshanlaw.com/people/Gregory-Jaske
Bar / Professional Activity
- New York
- Member of the Board of Trustees at Friends Academy, a private Quaker K-12 college preparatory school in Locust Valley, New York
Transactions
- Represented the fee owner in a leasehold restructuring of a data center facility, consisting of the simultaneous negotiation of (a) the surrender of the ground lease of the facility pursuant to an option contract, (b) the negotiation of an amendment to the existing space tenant (a major international financial institution), and (c) the negotiation of a new lease with a new space tenant (another major international financial institution) for the unoccupied portion of the facility.
- Represented a multi-billion-dollar family real estate business in connection with joint venture agreements for the ground up development of 3 multifamily buildings in Jersey City containing 500 units in the aggregate.
- Represented a multi-billion-dollar family real estate business in creating a Manhattan development site through a joint venture agreement for one of the tenant entities in a multi-tiered ground lease covering several adjacent parcels of land and excess development rights for the development of a 400,000+ square foot office building.
- Represented a multi-billion-dollar family office in its negotiation of real estate joint ventures with various real estate sponsors for the horizontal and vertical phases of: A new 1,000,000 square foot logistics facility in California; A 500,000 square foot apartment complex redevelopment in Florida; A 400,000 square foot office complex repositioning in North Carolina; A 400,000 square foot office to residential conversion project in Texas; A 250 unit garden complex repositioning in Texas; A 125,000 square foot industrial facility in California; A new 400 pad recreational vehicle park in Texas; A 100,000 square foot retail facility redevelopment in Connecticut; and A new 100,000 square foot office complex in northern California.
- Representation of a real estate company, as sponsor, in the negotiation of a programmatic joint venture with an institutional capital partner for the deployment of $166 million of equity toward the purchase of value add light industrial assets in the northeast. Negotiated a follow-on joint venture between the same parties for the deployment of an additional $250 million of equity in a broader geographical area.
- Represented one of the largest real estate investment firms in the world in connection with a programmatic joint venture with two sponsors for the deployment of $100 million of equity for the acquisition of medical office buildings.
- Represented a family real estate business in the sale of a data center facility in Denver, Colorado for $180 million to the subsidiary of a $100 billion publicly traded telecommunications company.
- Represented a publicly traded international company in its divestiture of four excess real estate assets in California, New York and Illinois for $47 million in the aggregate.
- Represented the owner of a development site in Queens in connection with its sale to a prominent New York developer for $88 million.
- Represented a New York developer in its acquisition, investor joint ventures and financing for the acquisition of several stabilized properties as well as three development sites for residential and mixed-use condominium projects in Brooklyn and Manhattan with total value of approximately $100 million.
- Represented a multi-billion dollar family real estate development business in a $57 million construction loan from an international banking institution for the development of a mixed use building containing 100+ rental apartments and ground floor commercial space.
- Represented a $20 billion private real estate fund in a $100 million leasehold mortgage financing from an institutional life insurance company covering a stabilized 250 unit rental building in Massachusetts.
- Represented a $14 billion private real estate fund in connection with a ground lease from a publicly traded REIT for the acquisition and repositioning of a 500,000 square foot office complex in Massachusetts.
- Represented a variety of retail healthcare portfolio companies (veterinary, dental, cardiology) in over 150 medical office lease transactions.
- Represented a $23 billion publicly traded retail wealth management company in various office lease transactions.
Educational Background
- J.D., Brooklyn Law School Associate Managing Editor, Brooklyn Journal of Corporate, Financial & Commercial Law
- B.A., Hamilton College President, Delta Upsilon, 2006-2007
Scholarly Lectures / Writings
- Olshan real estate partner Gregory Jaske published an article in New York Law Journal titled “Tips for Protecting Businesses from Imprecise Contractual Indemnity Provisions,” in which Greg sheds light on the concept of indemnification, explaining its prevalence within the real estate and legal sectors. Imprecise or contradictory indemnification language can prevent a contractual allocation of risk from being enforced in the manner a party intended. To mitigate this risk, Greg discusses five crucial elements business owners should know to avoid jeopardizing their contractual indemnity provisions. There are a variety of situations that could prompt indemnification. “In some instances,” Greg explains, “it is customary and appropriate for there to be broad categories of indemnified matters because the indemnitee is not involved in making decisions related to the operation of the business and it would not be equitable for the indemnitee to be responsible for such liabilities arising out of the underlying business activities in most foreseeable scenarios (e.g., a tenant’s indemnity of its landlord under a lease or a borrower’s indemnification of its lender under a loan). In other instances, an indemnification obligation should properly only arise out of some wrongful act or omission of the indemnitor because the indemnitee is responsible for performance of a specific portion of the underlying business activity (e.g., a subcontractor’s indemnification of the prime contractor under a subcontract).” It is also critical to understand who the liable party is and thoroughly describe the damage for which the indemnitor has agreed to take responsibility. As one documents the damage, it is important to include indirect damage to avoid being held responsible. “In virtually any context, the indemnitee should not be entitled to indemnification where it has caused the underlying indemnified matter through its own bad conduct such as fraud, gross negligence or willful misconduct,” Greg writes. He goes on to advise, “It is important for business owners to review their indemnification obligations and consider the scenarios in which they would not reasonably expect to be responsible for certain bad conduct of the indemnitee and ensure that those exclusions are expressly and clearly included in each indemnity provision.”, Author, Tips for Protecting Businesses from Imprecise Contractual Indemnity Provisions, New York Law Journal, 2025
- Olshan real estate partner Gregory Jaske published an article in Law360 titled “Recent Decisions Caution Against Broad Indemnity Provisions,” in which Greg provides insight on the importance of drafting indemnity provisions with appropriate restrictions citing cases such as Cashman Equipment Corp. v. Kim Marie Shaughnessy and Builders FirstSource-Southeast Group, LLC v. Palmetto Trim and Renovation. In Cashman, the dispute focused on Shaughnessy’s actions as the Chief Financial Officer for Cashman Equipment Corp. (CSC) and Servicio Marina Superior, LLC (SMS). Shaughnessy had established a Woman Business Enterprise (WBE) owned by her and an insurance trust affiliated with the plaintiff and of which she was a trustee, and after leaving her roles at CSC and SMS, she acquired the trust’s interest. While Shaughnessy was found at trial to have breached her fiduciary duty to the trust, the court held that she was nonetheless entitled to indemnification from the plaintiff because such a breach did not specifically preclude her right to indemnity under the applicable indemnity provisions. The latter case referenced highlights Builders FirstSource-Southeast Group (BFS), a construction company that outsourced labor from subcontractors for a development. The project experienced deficiencies causing the company to sue Palmetto Trim and Renovation for compensation. However, the Court of Appeals upheld the lower court’s application in which there must be “clear and unequivocal” intent of an obligation to indemnify a party for such indemnitee’s own negligence (which BFS lacked). Greg suggests that “Business owners and their attorneys should review the objectives of each contractual indemnity provision, discuss their primary objectives in the enforcement thereof, and seek to ensure that the same are compliant under applicable law, and will not be viewed unfavorably when a court is applying principles of equity, asking, ‘is the obligation fair to the indemnitee?’”, Author, Recent Decisions Caution Against Broad Indemnity Provisions, Law360, 2025
Honors
- Recognized in The Best Lawyers in America® as “One to Watch” for Real Estate Law, 2025, One to Watch” for Real Estate Law, The Best Lawyers in America®, 2025
- Named a “Rising Star” by New York Metro Super Lawyers annually since 2017, “Rising Star”, New York Metro Super Lawyers
Office location for Gregory H. Jaske
1325 Avenue of the Americas
15th Floor
New York, NY 10019
Selections
10 Years Rising Stars
- Rising Stars: 2017 - 2026