A former Manhattan carriage house once owned by Paul and Bunny Mellon has returned to the market with an asking price of $80 million. Developed by former Morgan Stanley CEO John Mack, the 16,000-square-foot vertical residence represents a rare scale for prime Upper East Side real estate.

From Carriage House to Modern Megamansion
The property at the center of the listing has a storied pedigree, previously serving as a private garage for philanthropist Bunny Mellon and her husband, Paul Mellon. Following its acquisition, the structure underwent a radical transformation led by the Macks, expanding into a nearly 16,000-square-foot vertical mansion designed for contemporary urban living.
Architectural changes prioritized both volumetric scale and structural fortification. Reported features of the residence include bulletproof glass, reinforcing its status as one of the most secure private homes in Manhattan.
Wellness and Entertainment Infrastructure
Modern luxury at this price point demands extensive amenity spaces that rival five-star hotels. The residence incorporates a dedicated cold plunge, a specialized wellness suite, and a custom wine cellar designed for serious collectors.
Additional spaces include a ground-level garage bar, blending functional utility with high-end hospitality. The vertical layout is serviced by private elevator access, connecting multiple levels of expansive living areas, formal dining spaces, and private quarters.
- Repurposing historical carriage houses allows for rare, sprawling footprints in dense urban cores.
- High-end security infrastructure, including ballistic glass, is increasingly standard for ultra-prime urban assets.
- Dedicated wellness facilities such as cold plunges add significant utility to vertical megamansions.
- Integrating hospitality-grade features like garage bars redefines traditional residential entertaining spaces.
Priced at $80 million, this Upper East Side listing tests the absolute ceiling of the Manhattan townhouse sector. Properties of this scale—combining nearly 16,000 square feet with institutional-grade security and modern wellness amenities—rarely trade, making comparable sales difficult to standardise. If successful at or near its asking price, the transaction could set a new benchmark for prime Manhattan residential real estate, demonstrating continued resilience and liquidity at the very top of the global property market.
Related reads
This $80 Million Manhattan Townhouse Was Once Paul and Bunny Mellon’s Private Garage (Robb Report, 15 Oct 2026)
Inside a NYC $80 Million Megamansion: Cold Plunge, Garage Bar, and Wine Cellar (Realtor.com, 13 Oct 2026)
George Foreman’s Texas Mansion in Photos (Yahoo, 15 Oct 2026)
Wall Street titan’s $80M bulletproof UES mansion could set Manhattan townhouse record (New York Post, 12 Oct 2026)
Former Morgan Stanley CEO lists UES townhouse for $80M (6sqft, 12 Oct 2026)
Sources & credits
- Feature: This $80 Million Manhattan Townhouse Was Once Paul and Bunny Mellon’s Private Garage — Robb Report Homes for Sale. Linked, not reproduced.
- Main image: Robb Report Homes for Sale, from the original feature linked above; all rights remain with the publisher and photographer.
- Headlines via Google News RSS; content belongs to the linked publishers.
Videos are embedded from their original YouTube channels and remain the property of their publishers; ClubProperty hosts no third-party footage or photography. Prices and details are as reported by the sources linked above at the time of writing. Nothing here is financial advice.
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