Office Building with Marble
For Lease
Contact for pricing
510-530 Walnut St, Philadelphia, PA 19106
Three-building office complex features polished marble floors, expansive window lines, and renovated office space throughout the towers.
Space Size8,550 SF
Days on Market409
Property Features for 510-530 Walnut St
General Information
Standard status
Active
Size
8,550 SF
Property subtype
OFFICE
Site & Location
Neighborhood
Spruce Hill
Additional Details
Space Use
Office
Amenities
concierge
security
Spaces For Lease
at 510-530 Walnut St
The Washington
AVAILABLE, Now
Size
8,550 SF
Type
OFFICE
Rate
Contact for pricing
Lease Type
NET_NNN
Sublease
Yes
- The One Washington Square (formerly Penn Mutual Towers) are established landmarks centered within Philadelphia's historic and business districts. The award-winning three-building complex, with towers constructed in 1914, 1930 and 1972, is one of the city's most highly regarded corporate addresses hosting a roster of prestigious firms. The Penn Mutual Towers overlook Independence Square and offer extraordinary views of the city from nearly every floor. The Philadelphia waterfront and some of the nation's most significant monuments add to the appeal of this important location. Impressive polished marble floors, commanding columns and intricate plaster ceilings above the walnut concierge and security station are striking indications of the quality of the complex. First class renovations throughout both towers offer comfortable, attractive and flexible space. Expansive window lines further enhance the setting, allowing natural light in offices and spectacular views.
Contact us
Listing Agency:
Cushman & Wakefield | Philadelphia
(215) 963-4000
Listed By:
Jason Bernardi
(215) 963-4005
Source:
Moodyscre
Added: Sep 17, 2025
Changed: Oct 25
Last Checked: Oct 28 at 11:24AM
Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of Cushman & Wakefield | Philadelphia
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Investment Insights
Based on property information with market context.
The One Washington Square is a three-building office complex with towers constructed in 1914, 1930, and 1972. The property is 8,550 SF and is designed for flexible corporate office use within an established landmark setting. Interiors include polished marble floors, commanding columns, and intricate plaster ceilings, with a walnut concierge and security station as part of the lobby experience.
The buildings overlook Independence Square, offering city views from nearly every floor. Expansive window lines bring natural light into the offices and frame the surrounding cityscape.
First class renovations are described throughout both towers, supporting comfortable, attractive, and adaptable space for office tenants seeking an upgraded environment with prominent architectural character.
The buildings overlook Independence Square, offering city views from nearly every floor. Expansive window lines bring natural light into the offices and frame the surrounding cityscape.
First class renovations are described throughout both towers, supporting comfortable, attractive, and adaptable space for office tenants seeking an upgraded environment with prominent architectural character.
Key Highlights
- Three‑building office complex with tower construction years: 1914, 1930, and 1972
- Polished marble floors throughout
- Commanding columns and intricate plaster ceilings
Property Analytics
Who owns this building?
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Current Use
Lease Details
NNN (Triple Net)
Lease Type
Location Intelligence
Trade Area within ½ mile
2,527
Businesses Nearby
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Business Placement
Demographics for 19106, PA
15,190
Population
9,913
Households
1.5
Avg Household Size
39
Median Age
80%
College-Educated
96%
High-School Grad
0.9 sq mi
ZIP Area
16,878
Density / Sq Mi
$129,779
Median Household Income
$93,953
Median Earnings
$2,219
Median Rent
$528,700
Median Home Value
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Market
Vacancy Rate% for Office in Philadelphia, PA
Frequently Asked Questions
What type of property is this?
Office building - Three-building office complex features polished marble floors, expansive window lines, and renovated office space throughout the towers.
Where is this office building located?
The property is located at 510-530 Walnut St Philadelphia, PA.
What are key features of this property?
This property features: Three‑building office complex with tower construction years: 1914, 1930, and 1972; Polished marble floors throughout; Commanding columns and intricate plaster ceilings
