Historic Office Towers
For Lease
Contact for pricing
510-530 Walnut St, Philadelphia, PA 19106
Three-tower office complex with renovated interiors, polished marble finishes, and expansive window lines.
Space Size44,549 SF
Days on Market364
Property Features for 510-530 Walnut St
General Information
Standard status
Active
Size
44,549 SF
Property subtype
OFFICE
Spaces For Lease
at 510-530 Walnut St Contact us- Floor
- 10
- Size
- 44,549 SF
- Type
- OFFICE
- Rate
- Contact for pricing
- Lease Type
- NET_NNN
- Availability
- AVAILABLE, Now
- Sublease
- No
The Washington
- The One Washington Square (formerly Penn Mutual Towers) are established landmarks...
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Listing Agency:
Cushman & Wakefield | Philadelphia
(215) 963-4000
Listed By:
Jack Meyers
(215) 963-4054
Source:
Moodyscre
Added: Sep 17, 2025
Changed: Sep 14
Last Checked: Sep 14 at 10:31AM
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
Investment Insights
Based on property information with market context.
The One Washington Square is a three-building office complex with tower construction dates of 1914, 1930, and 1972. Interiors include polished marble floors, commanding columns, and intricate plaster ceilings, centered around a walnut concierge and security station. First-class renovations are noted throughout the towers, designed to create comfortable, attractive, flexible office space, complemented by expansive window lines for natural light.
The complex is located near prominent city amenities, including the Federal Court and City Hall, with close access to Philadelphia’s Central Business District and surrounding hotels, dining, shops, theaters, medical centers, and galleries. It also references nearby residential areas within walking distance, along with parks and historic monuments.
On-site banking services are listed, and four garages are within a three-block radius. The property is also described as easily accessible by car.
The complex is located near prominent city amenities, including the Federal Court and City Hall, with close access to Philadelphia’s Central Business District and surrounding hotels, dining, shops, theaters, medical centers, and galleries. It also references nearby residential areas within walking distance, along with parks and historic monuments.
On-site banking services are listed, and four garages are within a three-block radius. The property is also described as easily accessible by car.
Key Highlights
- The One Washington Square is a three‑building office complex with towers built in 1914, 1930, and 1972.
- Renovated interiors in both towers with polished marble floors, commanding columns, and intricate plaster ceilings in the lobby area.
- Expansive window lines provide natural light and city views from nearly every floor.
Property Analytics
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Current Use
Lease Details
NNN (Triple Net)
Lease Type
Location Intelligence
Trade Area within ½ mile
2,527
Businesses Nearby
Explore this area
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
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Frequently Asked Questions
What type of property is this?
Office building - Three-tower office complex with renovated interiors, polished marble finishes, and expansive window lines.
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: The One Washington Square is a three‑building office complex with towers built in 1914, 1930, and 1972.; Renovated interiors in both towers with polished marble floors, commanding columns, and intricate plaster ceilings in the lobby area.; Expansive window lines provide natural light and city views from nearly every floor.
