11 Madison Avenue

11 Madison Avenue is one of the most architecturally distinctive and functionally powerful office buildings in Midtown South, occupying a full-block position directly across from Madison Square Park. For tenants evaluating office space in Manhattan, this property delivers a rare combination of scale, identity, and park-front presence, making it one of the most sought-after headquarters locations in the Flatiron District.

Originally constructed as the Metropolitan Life North Building, 11 Madison Avenue is a landmark Art Deco structure that has been extensively repositioned into a modern Class A office asset. The building retains its historic limestone façade and dramatic arched window design while integrating contemporary infrastructure, resulting in a workplace environment that blends legacy architecture with current tenant expectations. This balance is a key differentiator in a market where many tenants are choosing between character and efficiency—11 Madison Avenue delivers both.

From a layout perspective, the building is defined by its oversized, highly efficient floor plates, which are significantly larger than typical Midtown South inventory. This allows tenants to consolidate operations onto fewer floors while maintaining flexibility in design. Spaces can accommodate high-density workstation layouts, executive perimeter offices, multiple conference rooms, and expansive collaborative areas without sacrificing natural light. The building’s large windows and multiple exposures—particularly those facing Madison Square Park—create a bright, open working environment that enhances productivity and employee satisfaction.

The location is one of the strongest aspects of the asset. Positioned at the intersection of Flatiron, NoMad, and Midtown South, tenants benefit from immediate access to Madison Square Park, as well as a dense concentration of dining, hospitality, and retail amenities. The presence of Eleven Madison Park at the base further reinforces the building’s high-end identity, while surrounding streets offer a mix of boutique and institutional office environments that support a wide range of business types.

In terms of tenant profile, 11 Madison Avenue has historically attracted major institutional users, financial firms, and global corporations seeking large, efficient footprints in a prestigious Midtown South location. The building’s scale, combined with its architectural presence, makes it particularly well suited for headquarters operations or companies looking to establish a strong New York identity.

From a leasing strategy standpoint, 11 Madison Avenue occupies a unique position in the market. It provides the scale and operational efficiency typically associated with Midtown towers, while offering the character, neighborhood energy, and lifestyle advantages of Midtown South. This combination is increasingly difficult to find, especially for tenants requiring large contiguous space with a differentiated workplace environment.

Ultimately, 11 Madison Avenue stands as one of the premier office buildings in the Flatiron District, offering tenants a powerful mix of location, architecture, and functionality. For companies prioritizing image, efficiency, and employee experience, it remains one of the most compelling office opportunities in Manhattan.

Technical Specifications

11 Madison Avenue is a landmark Class A office tower positioned directly on Madison Square Park in Manhattan’s Flatiron District. Originally completed in the early twentieth century as part of the Metropolitan Life complex, the property has been extensively modernized into one of Midtown South’s largest and most capable office assets while preserving its iconic Art Deco architectural identity.

The building occupies a full city block bounded by Madison Avenue, Park Avenue South, East 24th Street, and East 25th Street. Its stepped limestone façade and tiered crown create one of the most recognizable skyline profiles in Midtown South, while delivering exceptional light, scale, and efficiency for large office users.

Core Building Metrics

• Building Address: 11 Madison Avenue, New York, NY 10010
• Submarket: Flatiron District / Midtown South
• Property Type: Class A Office Building
• Ownership: SL Green Realty Corp.
• Original Construction: 1932
• Redevelopment / Modernization: Fully repositioned with modern infrastructure upgrades
• Architectural Style: Art Deco / Pre-war Landmark Architecture
• Building Height: Approximately 30 stories
• Total Building Size: Approximately 2,300,000 Square Feet
• Floor Plate Sizes: Large-scale floor plates, many exceeding 70,000 Square Feet on lower levels
• Ceiling Heights: High slab-to-slab heights supporting modern and exposed ceiling installations
• Window Lines: Oversized vertical windows with strong natural light penetration across deep floor plates
• Lobby Presence: Grand, double-height attended lobby with restored architectural detailing
• Elevator Infrastructure: High-speed, zoned passenger elevator systems supporting large tenant populations
• HVAC Systems: Upgraded tenant-controlled mechanical infrastructure designed for modern density
• Sustainability Upgrades: Energy-efficiency improvements integrated into modernization programs
• Retail Component: Ground-floor retail and destination dining anchored by Eleven Madison Park
• Rooftop / Terrace Components: Select upper-floor terraces and tenant-access outdoor areas
• Loading Access: Full commercial loading infrastructure suitable for large office operations
• Security: Attended lobby with modern access-control and building security systems
• Fiber Connectivity: High-speed telecom and fiber infrastructure available throughout the building

Architectural & Structural Highlights

11 Madison Avenue is widely considered one of the defining office buildings surrounding Madison Square Park. The structure maintains its original limestone façade and Art Deco massing while incorporating modern Class A infrastructure internally. Its full-block footprint and massive scale create a presence that is rarely replicated in Midtown South.

The building’s tiered design allows for multiple exposures across most floors, improving natural light conditions despite unusually large floor plates. This creates a strong balance between density and workplace quality, which is a critical advantage for modern tenants.

From a structural standpoint, the steel-frame construction supports high load capacities and flexible layouts, enabling uses ranging from high-density tech environments to financial trading floors and headquarters operations. The modernization of core systems ensures performance consistent with institutional-grade office towers.

Workplace Environment

Modern office installations inside 11 Madison Avenue typically emphasize:

• Large open-plan workstation environments capable of supporting dense team layouts
• Perimeter private offices with direct park and skyline views
• Multiple conference rooms, boardrooms, and internal meeting suites
• Dedicated collaboration zones and breakout areas
• High-end pantry and hospitality installations
• Flexible layouts supporting hybrid workforce strategies

The scale of the building allows tenants to design highly customized environments without compromising efficiency or workflow.

Tenant Advantages

One of the strongest technical advantages of 11 Madison Avenue is its ability to deliver true headquarters-scale space within Midtown South. While many buildings in the Flatiron District are boutique in nature, this property provides institutional square footage combined with premium location benefits.

Tenants gain a prestigious Madison Square Park address, which significantly enhances branding, employee experience, and recruiting appeal. The immediate access to green space, dining, and neighborhood amenities creates a work environment that stands apart from traditional Midtown towers.

Additionally, the building’s size allows for long-term scalability within the same property, enabling companies to expand without relocating. This combination of scale, infrastructure, and location positions 11 Madison Avenue as one of the most strategically advantageous office buildings in Midtown South.

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Near By Transportation

11 Madison Avenue is positioned directly on Madison Square Park in the Flatiron District, placing tenants within immediate reach of Midtown South’s strongest subway and commuter connections. The location provides highly efficient access to Downtown Manhattan, Midtown, Brooklyn, Queens, and regional commuter rail systems.

Subway Stations:

• 23rd Street — (N, R, W): Approximately 1–2 minute walk west, providing direct Broadway corridor access through Midtown and Downtown Manhattan.

• 23rd Street — (F, M): Approximately 3–4 minute walk west, connecting Midtown West, Bryant Park, Rockefeller Center, and Queens.

• 23rd Street — (6): Approximately 4–5 minute walk east along Park Avenue South, providing direct Lexington Avenue corridor access.

• 28th Street — (R, W): Approximately 5 minute walk north for additional Broadway line access.

• Union Square — (4, 5, 6, L, N, Q, R, W): Approximately 8–10 minute walk south, providing one of Manhattan’s largest subway transfer hubs.

Commuter Rail Access:

• Long Island Rail Road (Penn Station): Approximately 10–12 minutes via subway or short taxi connection west.

• NJ Transit (Penn Station): Direct regional rail connectivity to New Jersey commuters.

• Amtrak (Penn Station): Convenient intercity rail access for Northeast Corridor travel.

• Metro-North Railroad (Grand Central Terminal): Easily accessible via the 6 train or short subway connection uptown.

Nearby Transit Advantages:

• Immediate proximity to Madison Square Park significantly improves pedestrian accessibility and employee experience.

• Direct access to Midtown South, Flatiron, Chelsea, NoMad, Gramercy, Union Square, and Midtown East within minutes.

• Strong north-south and east-west subway connectivity supports flexible commuting patterns across all boroughs.

• Multiple Citi Bike stations and protected bike lanes throughout the Flatiron District improve alternative commuting options.

Bus Routes:

• Multiple MTA routes operate directly along Madison Avenue, Fifth Avenue, Broadway, and Park Avenue South, including the M1, M2, M3, M5, M7, and M23 SBS lines.

Key Transportation Advantage:

• Located directly adjacent to Madison Square Park, 11 Madison Avenue combines institutional-scale office infrastructure with one of the most transit-connected and lifestyle-oriented locations in Midtown South, creating a highly efficient commute profile for both local and regional employees.

Notable Buildings in the Area

11 Madison Avenue sits at the center of one of Manhattan’s most architecturally and commercially dense corridors, surrounded by a mix of landmark office buildings, modern redevelopments, and institutional assets that define Midtown South.

• Flatiron Building (175 Fifth Avenue): One of New York City’s most iconic landmarks, anchoring the Flatiron District and reinforcing the architectural identity of the immediate area.

• 200 Fifth Avenue (200 Fifth Avenue): A premier Class A office building directly across Madison Square Park, known for its curved façade and flagship retail anchored by Eataly.

• One Madison Avenue (1 Madison Avenue): A newly redeveloped, next-generation office tower delivering modern infrastructure and large floor plates directly overlooking Madison Square Park.

• 10 East 23rd Street (10 East 23rd Street): Boutique office building offering smaller, design-forward office spaces in a prime Flatiron location.

• 41 Madison Avenue (41 Madison Avenue): A major showroom and office building historically tied to the fashion and trade industries.

• 11 East 26th Street (11 East 26th Street): Classic Midtown South loft-style office building with strong appeal to creative and technology tenants.

• 315 Park Avenue South (315 Park Avenue South): A fully modernized Class A office property known for high-end prebuilt installations and strong tenant demand.

• 386 Park Avenue South (386 Park Avenue South): A renovated office building offering efficient layouts and proximity to Madison Square Park.

• 40 West 25th Street (40 West 25th Street): Creative office asset positioned between Flatiron and NoMad, catering to boutique and mid-sized tenants.

• 875 Sixth Avenue (875 Avenue of the Americas): Large-scale office tower providing institutional space options within walking distance.

• 156 Fifth Avenue (156 Fifth Avenue): Classic cast-iron loft building representative of the neighborhood’s historic commercial architecture.

Zip Code

10010