Quinlan Development Group is a privately-held real estate investment and development company based in New York City, with a commitment to long-term ownership. Founded in 1971, the multi-generational family company has earned a reputation as one of New York City’s most well respected developers. Quinlan Development Group has a track record of success during all market cycles and across multiple asset types.

About the Company

Quinlan Development Group has been consistently successful by focusing on locations with strong growth potential, and opportunities where value is realized through creative and experienced hands-on management. This is accomplished by recognizing a property’s untapped potential while considering downside risks. This conservative approach, with strategically-timed acquisitions, has provided outsized investment returns for over four decades.

Executive Team

Quinlan Development Group has assembled a team of well-regarded and experienced professionals who work collaboratively while overseeing every aspect of each project. Everyone works with a goal-oriented approach, where clear communication and timely actions contribute to a project’s success. The company emphasizes integrity, character, and dedication, to safeguard continued success and a culture of responsibility.


Quinlan Development Group has built, renovated, or invested in over thirty-six properties encompassing a wide variety of asset types, including mixed-use rentals, luxury condominiums, retail, self-storage, and commercial office. The result is an existing portfolio of over 3 million square feet and ownership of over 125 retail stores totaling more than 400,000 square feet, covering the equivalent of fifteen city blocks.

Management & Leasing

Walker, Malloy & Company is a full service management company with over 40 years of experience in Manhattan, managing co-ops, condos, rentals and retail buildings. Walker Malloy provides efficient and cost effective property management. We believe that good and timely maintenance prevents more costly future problems, so out full time staff regularly monitors our buildings, preventing minor work from becoming an expensive repair. We understand that quality of life can be determined by the quality of the property management. Our firm provides tenants and owners with a friendly agent who quickly responds to maintenance needs, 24 hours a day, every day.