Zeckendorf Development is a private New York developer creating ultra-luxury, for-sale residential condominiums and mixed-use urban properties. Its work serves affluent buyers, primarily in Manhattan, through ground-up construction, conversions, design leadership, entitlement work, and selected joint ventures with capital partners.
AI-researched delivery record, not yet confirmed by the developer. Dates may be approximate; original sources are linked.
AI research over published reviews and resident comments. Scores are a model’s reading of opinion, not figures stated on a page, and nothing here feeds any number above it. The links under each block are the pages that research says it used. Based on available resident reviews of covered buildings. These are reported experiences, not independent building inspections, and may not represent all residents or properties.
AI-researched delivery record, not yet confirmed by the developer. Dates may be approximate; original sources are linked.
AI research over published reviews and resident comments. Scores are a model’s reading of opinion, not figures stated on a page, and nothing here feeds any number above it. The links under each block are the pages that research says it used. Based on available resident reviews of covered buildings. These are reported experiences, not independent building inspections, and may not represent all residents or properties.
| Project | Overall | Structure & systems | Management & living |
|---|---|---|---|
| 520 Park AvenueUpper East Side, New York34 units | 7.7/ 10 | —/ 10 | —/ 10 |
Google Reviews/Maps is the only located published review aggregate for the building: 5/5 from two reviews, which converts to 10/10 on the stated curve. Because the review base is below ten, the final score is kept within one point of 6.5, yielding 7.5; no commentary adjustment is supported because no written review themes were available. | |||
No resident review text located for 520 Park Avenue discussed framework, plumbing, HVAC, electrical systems, leaks, or waterproofing. A separate city-record summary reports no open housing-code violations, but that is a records finding rather than a resident review or a published building-condition rating. | The located review aggregate shows 5.0/5 from two reviews, but no written operational comments were available to assess management speed, staff attitude, security, upkeep, or amenities. Other building-review pages explicitly say there are no tenant reviews yet, so the day-to-day picture remains uncertain and should not be inferred from the small aggregate. | ||
| 115 East 55th StreetMidtown East, New York58 units | 7.4/ 10 | —/ 10 | —/ 10 |
Apartments.com publishes a 5.0/5 building rating based on one verified resident review, but the scoring rules require fewer than three written reviews to return a null score when no eligible anchor exists. No additional eligible building review aggregate with at least 10 reviews was located. | |||
The only resident review described “very high quality construction and finishes” throughout the building and apartments. Separately, the building record reports a 2024 indoor-air-quality complaint for “Sewage Odor,” marked closed; this is a city-record condition report, not a resident review, and does not establish a continuing defect as of October 15, 2026. | The one verified resident praised the “Fantastic” building and location, an “especially well equipped fitness center,” and “Extraordinary service from the super, and the front desk staff.” Property descriptions also document a 24-hour attended lobby, resident lounge, meeting rooms, fitness center and garden, but these are amenities descriptions rather than additional resident-review evidence. |
Atlas is Zeckendorf's joint-venture partner in the West Village/St. John's Terminal residential development.
Baupost is part of the joint venture for the West Village development and participated in its financing structure.
Blackstone provided a $322 million financing package for land acquisition and pre-development work.
COOKFOX is the architect for the planned West Village residential property.
Global Holdings partnered with Zeckendorf on 520 Park Avenue.
The joint venture—Zeckendorf Development ("Zeckendorf"), Atlas Capital Group ("Atlas") and The Baupost Group—secured a $322 million financing package from Blackstone.
The joint venture—Zeckendorf Development ("Zeckendorf"), Atlas Capital Group ("Atlas") and The Baupost Group—secured a $322 million financing package from Blackstone.
The joint venture—Zeckendorf Development ("Zeckendorf"), Atlas Capital Group ("Atlas") and The Baupost Group—secured a $322 million financing package from Blackstone.
The project is a rare opportunity, which will ultimately create a skyline-defining residential property designed by renowned architect COOKFOX.
At 520 Park, the brothers are partnered with Global Holdings, run by Monaco-based private investor Eyal Ofer
| COMPANY NUMBER | 3061845 New York Department of State · US · active |
| United States | active 3 projects tracked |
| Residential, for sale | 2 of 3 |
| Retail | 1 of 3 |
| Residential, for rent | 1 of 3 |
Education Tufts University, B.A.
Education Tufts University, B.A.
Arthur William Zeckendorf is an owner, founder and co-chairman of Zeckendorf Development, LLC
Partner at Zeckendorf Development
Arthur William Zeckendorf is an owner, founder and co-chairman of Zeckendorf Development, LLC and Co-Chairman Terra Holdings, LLC
Arthur W. Zeckendorf has been involved in New York residential real estate development and managing real estate companies since 1981.
Arthur William Zeckendorf is an owner, founder and co-chairman of Zeckendorf Development, LLC
Arthur William Zeckendorf is an owner, founder and co-chairman of Zeckendorf Development, LLC
Arthur William Zeckendorf is an owner, founder and co-chairman of Zeckendorf Development, LLC
Arthur W. Zeckendorf has been involved in New York residential real estate development and managing real estate companies since 1981.
Along with his brother, William Lie Zeckendorf, Arthur W. Zeckendorf, through Zeckendorf Development, LLC has developed over $4 Billion of properties.
Arthur William Zeckendorf is an owner, founder and co-chairman of Zeckendorf Development, LLC
Architecture. We start with architecture and then the brand follows.The Seventh Art March 1, 2023https://www.theseventhart.com/constructing-history-in-new-york-city-an-interview-with-william-l-zeckendorf/
Development is a top-down business, only about 15 professionals…whereas in Terra Holdings, which has grown to be 3,000 professionals across seven states, it’s very much a listening business.Inman April 7, 2016https://www.inman.com/2016/04/07/zeckendorf-forecasts-strong-demand-2016/
He is a 1980 graduate of Tufts University, and 1984 graduate of the Harvard Business School.
He is a 1980 graduate of Tufts University, and 1984 graduate of the Harvard Business School.
William L. Zeckendorf is owner, founder and co-chairman of Zeckendorf Development, LLC
William L. Zeckendorf is owner, founder and co-chairman of Zeckendorf Development, LLC, as well as co-chairman of Terra Holdings, LLC
Mr. Zeckendorf currently serves on the Board of Directors of Jazz at Lincoln Center.
Architecture. We start with architecture and then the brand follows.
Development is a top-down business, only about 15 professionals…whereas in Terra Holdings, which has grown to be 3,000 professionals across seven states, it’s very much a listening business.
Co-founding Zeckendorf Development with his brother in 1992
The Zeckendorfs have developed approximately $4.0 billion in properties during their careers.
William L. Zeckendorf is owner, founder and co-chairman of Zeckendorf Development, LLC
William L. Zeckendorf is owner, founder and co-chairman of Zeckendorf Development, LLC
William L. Zeckendorf is owner, founder and co-chairman of Zeckendorf Development, LLC
Co-founding Zeckendorf Development with his brother in 1992
William L. Zeckendorf is owner, founder and co-chairman of Zeckendorf Development, LLC
This was his deal.The Real Deal July 1, 2025https://therealdeal.com/magazine/july-2025/artie-zeckendorf-profile/
He studied international relations and economics
Like his father, Artie went to Tufts.
He got his MBA at Columbia University in 2015
He got his MBA at Columbia University in 2015
Arthur William Zeckendorf III — Artie, 38 —
JPMorgan Chase’s Global Real Assets division hired him.
Associate at AEW Capital Management
“I give Artie a lot of credit,” the source said. “This was his deal.”
In 2017, he returned to Zeckendorf Development as a partner.
another source said for the Zeckendorfs, he’s been “managing director, for lack of a better term,” noting, “this was Artie’s responsibility to execute.”
In 2017, he returned to Zeckendorf Development as a partner.
the project served as the coming-out party for the next generation to continue the family’s history
JPMorgan Chase’s Global Real Assets division hired him.
He got his MBA at Columbia University in 2015
Artie was instrumental in bringing the family in once it was clear that they were Atlas Capital’s top choice to partner and develop one of the most sought-after plots of land in the city.
In 2017, he returned to Zeckendorf Development as a partner.
Washington and Lee University, Bachelor of Business Administration - BBA
Washington and Lee University, Bachelor of Business Administration - BBA
CFO and Senior Vice President at ZECKENDORF DEVELOPMENT, LLC
CFO and Senior Vice President - ZECKENDORF DEVELOPMENT, LLC (Current) Mar 1992 - Present
Responsible for all financial reporting, budget preparation (for both new construction and stable assets), and analysis and underwriting of potential new deals.
CFO and Senior Vice President at ZECKENDORF DEVELOPMENT, LLC
CFO and Senior Vice President at ZECKENDORF DEVELOPMENT, LLC
Senior real estate executive with over 25 years of experience in the management and development of major luxury real estate projects in Manhattan.
I have coordinated all project financing and led teams that have successfully closed over $2B (two billion) dollars in conventional and non-conventional financing.
CFO and Senior Vice President at ZECKENDORF DEVELOPMENT, LLC
B.S. Civil Engineering at Columbia Engineering
B.S. Civil Engineering at Columbia Engineering
Director of Construction and Development at Zeckendorf Development, LLC
Project Manager - Lendlease
Director of Construction and Development - ZECKENDORF DEVELOPMENT, LLC (Current) Nov 2021 - Present
Project Manager / Senior Project Manager for 520 Park Avenue residential high rise project for Zeckendorf Development in New York, NY
Director of Construction and Development at Zeckendorf Development, LLC
Department: Project Management
Project Manager - Lendlease
B.S. Civil Engineering at Columbia Engineering
Director of Construction and Development - ZECKENDORF DEVELOPMENT, LLC (Current) Nov 2021 - Present
Master's of Professional Studies, Real Estate at Georgetown University School of Continuing Studies
Master's of Professional Studies, Real Estate at Georgetown University School of Continuing Studies
Bachelor of Science, Architecture (Minor, Civil Engineering) at University of Virginia
Bachelor of Science, Architecture (Minor, Civil Engineering) at University of Virginia
Vice President of Construction and Development
Vice President of Construction and Development - ZECKENDORF DEVELOPMENT, LLC (Current) Jun 2022 - Present
Vice President of Construction and Development - ZECKENDORF DEVELOPMENT, LLC (Current) Jun 2022 - Present
Vice President of Construction and Development
Vice President of Construction and Development
Department: Operations
Master's of Professional Studies, Real Estate at Georgetown University School of Continuing Studies
Bachelor of Science, Architecture (Minor, Civil Engineering) at University of Virginia
Vice President of Construction and Development - ZECKENDORF DEVELOPMENT, LLC (Current) Jun 2022 - Present
0 undated completions and 0 boundary-uncertain completions are retained but excluded from figures.
| Project | Location | Type | Units | Floors | Area | Cost | Payment plan | Launched | Construction start | Original target | Handover | Delay | Confidence | Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| The Treadwell | New York, United States Upper East Side | residential for sale, retail | 661 | 28 | 125,000 sq ft | — | — | 2023 | October 17, 2023 | Jan 2024 – Dec 2024 | Mar 2024 | −3.5 mo (−9.0 to +2.0) | estimated | completed |
| 115 East 55th Street | New York, United States Midtown East | residential for rent | 581 | 18 | 71,961 sq ft | — | — | 2022 | July 21, 2022 | Mar 2022 | Jul 2022 | +4.0 mo (+4.0 to +4.0) | estimated | completed |
| 520 Park Avenue | New York, United States Upper East Side | residential for sale | 341 | 54 | 200,000 sq ft | — | — | 2015 | September 30 and October 1, 2015 | Jan 2017 – Apr 2017 | Jan 2018 – Dec 2018 | +16.0 mo (+9.0 to +23.0) | sourced | completed |
| Coverage | active |
| Tracked since | October 10, 2026 |
| Last checked | October 15, 2026 this month |
| Profile last researched | October 15, 2026 |
| Claim |