Business Details
48 Years
experience
Emergency
services
Expert Property Management Services in New York
Since 1978, Cornerstone Management Systems has dedicated itself to delivering full-service management for Manhattan's residential properties. Our philosophy centers on the belief that every building deserves knowledgeable, responsive management to ensure quality of life and financial stability. With over 45 years of experience, we prioritize integrity, diligence, and commitment in property management, financial planning, and project oversight. Our 24/7 live support ensures immediate assistance for client needs at any time. A 98% client retention rate reflects our success in meeting property management needs through tailored solutions and collaborative planning.We serve properties of all sizes with equal effort and dedication, maintaining rigorous fiscal management and proactive budgeting. Our team combines decades of experience in insurance, legal matters, real estate taxes, and shareholder relations. From handling day-to-day operations to managing complex projects like roof replacements and energy improvements, we ensure smooth, cost-efficient operations. Our personalized approach includes monthly board meetings, detailed management reports, and online payment systems. Backed by three generations of family business values, we continue to build on our foundation of honesty and excellence in residential management.
Services
Property Management
Financial Management
Project Management
Emergency Maintenance
Project Scoping
Construction Management
Insurance Review
Capital Planning
Property Inspections
Online Bill Payment
Details
- Year established: 1978
Highlights and features
- We provide 24/7 live support for immediate assistance
- Our 98% client retention rate demonstrates satisfaction
- Specializing in Manhattan properties since 1978
- Offer financial, project, and property management expertise
- Tailored management plans for each building's unique needs
Services
Property Management
Our comprehensive property management services ensure optimal building performance through daily operations and preventive maintenance. We supervise staff, ensure code compliance, and provide monthly board meeting attendance with detailed management reports. Our personalized approach includes online payment portals and constant 24-hour accessibility for urgent property needs.
Financial Management
We deliver rigorous financial management with proactive budgeting and detailed monthly reports. Our experts handle long-term capital planning, insurance reviews, and commercial/residential leasing analysis. This ensures property financial health while maintaining transparency through regular reporting to boards and accountants.
Project Management
Our team manages projects from simple maintenance to complex renovations like roof replacements and energy efficiency upgrades. We guarantee timely completion with budget adherence and resident communication, handling everything from initial scoping to final execution of projects like window replacements and lobby renovations.
People
Leonard Fox
President
President and founding partner with over 37 years of experience, Leonard Fox is an expert in insurance, legal matters, and real estate taxes. He has guided clients through major crises, ensuring stability and growth. His leadership maintains Cornerstone's commitment to excellence and client-focused management.
Allen Abbani
Vice President / Controller
Vice President and founding partner with 37 years of real estate experience, Allen Abbani excels in financial management. He graduated first in finance at Brooklyn College and oversees monthly financial reports. His organizational skills have established Cornerstone as an industry leader in property management.
Ariel Fox
Property Manager
Property Manager Ariel Fox combines real estate expertise from Cornerstone and Park Avenue Mortgage. He focuses on professionalism and resident relationships, leveraging 20+ years of NYC property management experience to ensure smooth building operations and board communication.
Juan Chio
Property Manager
Property Manager Juan Chio oversees boutique Co-ops and Condos in TriBeCa with 12+ years of experience. He excels in administrative tasks, building systems knowledge, and resolving issues efficiently. His expertise ensures satisfaction for residents and property owners alike.
Michelle Greenspan
Property Manager
Property Manager Michelle Greenspan brings 18 years of experience since 2005, specializing in Co-ops and Condos in Flatiron District and Upper West Side. Her efficient management style allows boards to focus on strategic matters while she handles daily operational needs.
Questions
What geographic areas do you serve?
We specialize in Manhattan properties but manage buildings throughout New York City.
What's included in property management?
Our services cover daily operations, preventive maintenance, staff supervision, code compliance, budgeting, and monthly board meetings with detailed reports.
Do you offer financial planning services?
Yes, we provide proactive budgeting, financial reports, capital planning, and insurance reviews as part of our comprehensive management services.
Why do clients stay with you long-term?
Our 98% client retention rate comes from personalized management, 45+ years of experience, and consistent delivery of financial stability and property maintenance.
Reviews (6)
Jdfromsag
Apr 29, 2022
Report
Was in a pinch when my lease was expiring and they helped me with my options. Very rare in Manhattan to have a management company be understanding and helpful.
Bill Smith
Dec 14, 2020
Report
Cornerstone Mgt is brilliant. Organized, meticulous, professional and with a sense of humor (much needed in managing any NYC site) that makes it all a pleasure. Cornerstone is heroic with a special laurel to our personal manager the dazzling George Sopasakis.
Max Moondoc
Feb 22, 2020
Report
Ive dealt with several management companies in my time in NYC. Cornerstone is a breath of fresh air. They do what they say they are going to do, and always do it with a good attitude and in an expedient manner. Its just nice to deal with a management company that doesn't make everything harder than it needs to be a sticks to their word. Which is the total opposite of what I have experienced with other management companies. A+
Sp B.
Feb 22, 2020
Report
First graders still learning how go to life. One step at a time woops that last step. Corrpt, I wouldn't deal if I was the Grinch. Unlawfully useless organization. Audra the mouth of operation is a good choice for impeached. Who the real estate owner is ta da. You'll never never rent if your interested good luck
Takk Yamaguchi
Oct 26, 2019
Report
Worked with them as a vendor and client for 10+ years. The landlord business is a tough business. You can't please 100% of the population. Things go wrong all the time, 100% of the time, and they deal with it with ethics and common sense. Dealing with them has been a pleasure. They actually pick up the phone (unlike 90% of the NYC property management), pay on time, and treats their tenants and vendors with the level of respect that we all deserve.
Marc Densen
Dec 25, 2018
Report
One of the best Property Managements in NYC. Such a great staff, very helpful & always there to help whenever you need them. I highly recommend Cornerstone Management.
