Historic Office Building
For Lease
Contact for pricing
510-530 Walnut St, Philadelphia, PA 19106
Three-building office complex featuring renovated interiors, polished marble finishes, and expansive window lines for natural light.
Space Size15,977 SF
Days on Market364
Property Features for 510-530 Walnut St
General Information
Standard status
Active
Size
15,977 SF
Property subtype
OFFICE
Amenities
concierge
security station
on-site banking
Spaces For Lease
at 510-530 Walnut St Contact us- Floor
- 12
- Size
- 15,977 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 3
Last Checked: Sep 14 at 9:23AM
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 landmark three-building office complex with towers constructed in 1914, 1930, and 1972. Interiors include polished marble floors, prominent columns, and intricate plaster ceilings above a walnut concierge and security station. First-class renovations are noted throughout both towers, with expansive window lines designed to bring natural light into office space.
Located at 510–530 Walnut St in Philadelphia, the complex is described as being close to the Federal Court, City Hall, and the Central Business District, with hotels, fine dining, shops, theaters, medical centers, and galleries nearby. The property also states proximity to residential areas including Society Hill and Queen Village.
Additional on-site amenities include banking services, with four garages within a three-block radius and easy car access noted in the remarks.
Located at 510–530 Walnut St in Philadelphia, the complex is described as being close to the Federal Court, City Hall, and the Central Business District, with hotels, fine dining, shops, theaters, medical centers, and galleries nearby. The property also states proximity to residential areas including Society Hill and Queen Village.
Additional on-site amenities include banking services, with four garages within a three-block radius and easy car access noted in the remarks.
Key Highlights
- Three‑building office complex with towers constructed in 1914, 1930, and 1972
- Polished marble floors, commanding columns, and intricate plaster ceilings above the walnut concierge and security station
- Renovated interiors in both towers, designed to create flexible office space
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
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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
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Frequently Asked Questions
What type of property is this?
Office building - Three-building office complex featuring renovated interiors, polished marble finishes, and expansive window lines for natural light.
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 towers constructed in 1914, 1930, and 1972; Polished marble floors, commanding columns, and intricate plaster ceilings above the walnut concierge and security station; Renovated interiors in both towers, designed to create flexible office space
