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Valley Forge Square I King Of Prussia, PA 19406 797 - 90,377 SF of Office Space Available
PARK HIGHLIGHTS
- Attractive multi-building office campus in a vibrant Philadelphia suburb minutes to shopping, dining, entertainment, and hospitality options.
- Well-maintained Class A office buildings offering turnkey and customizable suites ranging from 1,063 square feet to 29,890 square feet.
- Perfectly positioned within a five-minute drive of King of Prussia Mall, the largest mall in the nation with over 450 stores and 30 eateries.
- Enjoy an effortless commute with a five-minute drive to Pennsylvania Tnpk, I-76, and Routes 202 and 422, plus a five-minute walk to bus stops.
PARK FACTS
ALL AVAILABLE SPACES(13)
Display Rental Rate as
- SPACE
- SIZE
- TERM
- RENTAL RATE
- SPACE USE
- CONDITION
- AVAILABLE
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Fits 17 - 54 People
- Secure card-key building access
- Superior King of Prussia location
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Partially Built-Out as Standard Office
- Fits 11 - 54 People
- Natural Light
- Walking distance to hotels on adjacent properties
- Mostly Open Floor Plan Layout
- Space is in Excellent Condition
- Secure card-key building access
- Superior King of Prussia location
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Fits 28 - 89 People
- Secure card-key building access
- Superior King of Prussia location
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
| Space | Size | Term | Rental Rate | Space Use | Condition | Available |
| 1st Floor, Ste 100 | 6,732 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | - | Now |
| 1st Floor, Ste 101 | 4,154-6,732 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Partial Build-Out | 2026-03-01 |
| 3rd Floor, Ste 300 | 11,113 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | - | Now |
680 American Ave - 1st Floor - Ste 100
680 American Ave - 1st Floor - Ste 101
680 American Ave - 3rd Floor - Ste 300
- SPACE
- SIZE
- TERM
- RENTAL RATE
- SPACE USE
- CONDITION
- AVAILABLE
- Fits 86 - 276 People
- Secure card-key building access
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
- Fits 12 - 36 People
- Secure card-key building access
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
- Fits 11 - 34 People
- Secure card-key building access
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
| Space | Size | Term | Rental Rate | Space Use | Condition | Available |
| 1st Floor, Ste 100 | 29,890 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | - | Now |
| 2nd Floor, Ste 201 | 4,492 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | - | Now |
| 2nd Floor, Ste 204A | 4,166 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | - | 30 Days |
475 Allendale Rd - 1st Floor - Ste 100
475 Allendale Rd - 2nd Floor - Ste 201
475 Allendale Rd - 2nd Floor - Ste 204A
- SPACE
- SIZE
- TERM
- RENTAL RATE
- SPACE USE
- CONDITION
- AVAILABLE
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
- Fits 12 - 38 People
- Secure card-key building access
- Superior King of Prussia location
- Fits 6 - 17 People
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Listed lease rate plus proportional share of electrical cost
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
- Fits 3 - 9 People
- Secure card-key building access
- Superior King of Prussia location
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Partially Built-Out as Standard Office
- Fits 6 - 17 People
- Secure card-key building access
- Superior King of Prussia location
- Office intensive layout
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
- Partially Built-Out as Standard Office
- Fits 28 - 87 People
- Mostly Open Floor Plan Layout
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Listed lease rate plus proportional share of electrical cost
- Fits 15 - 47 People
- Secure card-key building access
- Superior King of Prussia location
- Partially Built-Out as Standard Office
- Space is in Excellent Condition
- Walking distance to hotels on adjacent properties
| Space | Size | Term | Rental Rate | Space Use | Condition | Available |
| 1st Floor, Ste 101 | 4,750 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Full Build-Out | Now |
| 1st Floor, Ste 103 | 2,004 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | - | Now |
| 1st Floor, Ste 107 | 1,063 SF | Negotiable | $27.00 CAD/SF/YR $2.25 CAD/SF/MO $28,699 CAD/YR $2,392 CAD/MO | Office | Partial Build-Out | Now |
| 2nd Floor, Ste 202 | 2,019 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Partial Build-Out | Now |
| 2nd Floor, Ste 203 | 10,840 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Partial Build-Out | Now |
| 3rd Floor, Ste 304 | 5,779 SF | Negotiable | $27.00 CAD/SF/YR $2.25 CAD/SF/MO $156,020 CAD/YR $13,002 CAD/MO | Office | Partial Build-Out | Now |
660 American Ave - 1st Floor - Ste 101
660 American Ave - 1st Floor - Ste 103
660 American Ave - 1st Floor - Ste 107
660 American Ave - 2nd Floor - Ste 202
660 American Ave - 2nd Floor - Ste 203
660 American Ave - 3rd Floor - Ste 304
- SPACE
- SIZE
- TERM
- RENTAL RATE
- SPACE USE
- CONDITION
- AVAILABLE
- Fits 2 - 7 People
| Space | Size | Term | Rental Rate | Space Use | Condition | Available |
| 2nd Floor, Ste 202 | 797 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | - | 2026-02-01 |
700 American Ave - 2nd Floor - Ste 202
680 American Ave - 1st Floor - Ste 100
| Size | 6,732 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | - |
| Available | Now |
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Fits 17 - 54 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
- Superior King of Prussia location
680 American Ave - 1st Floor - Ste 101
| Size | 4,154-6,732 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Partial Build-Out |
| Available | 2026-03-01 |
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Partially Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Fits 11 - 54 People
- Space is in Excellent Condition
- Natural Light
- Secure card-key building access
- Walking distance to hotels on adjacent properties
- Superior King of Prussia location
680 American Ave - 3rd Floor - Ste 300
| Size | 11,113 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | - |
| Available | Now |
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Fits 28 - 89 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
- Superior King of Prussia location
475 Allendale Rd - 1st Floor - Ste 100
| Size | 29,890 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | - |
| Available | Now |
- Fits 86 - 276 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
475 Allendale Rd - 2nd Floor - Ste 201
| Size | 4,492 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | - |
| Available | Now |
- Fits 12 - 36 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
475 Allendale Rd - 2nd Floor - Ste 204A
| Size | 4,166 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | - |
| Available | 30 Days |
- Fits 11 - 34 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
660 American Ave - 1st Floor - Ste 101
| Size | 4,750 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Full Build-Out |
| Available | Now |
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Fully Built-Out as Standard Office
- Fits 12 - 38 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
- Superior King of Prussia location
660 American Ave - 1st Floor - Ste 103
| Size | 2,004 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | - |
| Available | Now |
- Fits 6 - 17 People
660 American Ave - 1st Floor - Ste 107
| Size | 1,063 SF |
| Term | Negotiable |
| Rental Rate | $27.00 CAD/SF/YR |
| Space Use | Office |
| Condition | Partial Build-Out |
| Available | Now |
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Listed lease rate plus proportional share of electrical cost
- Fits 3 - 9 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
- Superior King of Prussia location
660 American Ave - 2nd Floor - Ste 202
| Size | 2,019 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Partial Build-Out |
| Available | Now |
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Partially Built-Out as Standard Office
- Office intensive layout
- Fits 6 - 17 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
- Superior King of Prussia location
660 American Ave - 2nd Floor - Ste 203
| Size | 10,840 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Partial Build-Out |
| Available | Now |
- Partially Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Fits 28 - 87 People
660 American Ave - 3rd Floor - Ste 304
| Size | 5,779 SF |
| Term | Negotiable |
| Rental Rate | $27.00 CAD/SF/YR |
| Space Use | Office |
| Condition | Partial Build-Out |
| Available | Now |
Twin” buildings 660 and 680 American Avenue are Class “A” buildings that feature functional and inviting architectural details. 660 and 680 American Avenue are located minutes from Routes 202 and 422, Pennsylvania Turnpike and I-76. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino. 660 and 680 American Avenue are adjacent to the hotel accommodations at the Hyatt Place Philadelhia / King of Prussia and the extended Stay America Philadelphia / King of Prussia.
- Listed lease rate plus proportional share of electrical cost
- Partially Built-Out as Standard Office
- Fits 15 - 47 People
- Space is in Excellent Condition
- Secure card-key building access
- Walking distance to hotels on adjacent properties
- Superior King of Prussia location
700 American Ave - 2nd Floor - Ste 202
| Size | 797 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | - |
| Available | 2026-02-01 |
- Fits 2 - 7 People
MATTERPORT 3D TOUR
660 American Ave Lobby Matterport Virtual Tour
SITE PLAN
PARK OVERVIEW
Valley Forge Square I is a five-building office campus located in King of Prussia among office space, residential neighborhoods, and sought-after amenities. “Twin” buildings 660 and 680 American Avenue are Class A buildings that feature functional and inviting architectural details. The Meeting House at 550 American Avenue serves as the headquarters of the dedicated ownership, Westover Companies. With over 26,000 square feet of rentable office space, 550 American Avenue is an ideal business destination. 475 Allendale Road is a 103,424-square-foot Class A building that boasts meticulously landscaped grounds and a welcoming entrance. 700 American Avenue is a Class A building sitting at 58,000 square feet that brings architecture and function to the forefront of business practices. Just minutes from Routes 202 and 422, the Pennsylvania Turnpike, and I-76, Valley Forge Square I is an ideal location. Located less than a mile from the King of Prussia Mall and the Valley Forge Casino, Valley Forge Square I is adjacent to hotel accommodations at the Hyatt Place Philadelphia/King of Prussia and the Extended Stay America Philadelphia/King of Prussia. In addition, Valley Forge Square I is within walking distance of SEPTA bus routes and the King of Prussia Connector shuttle.
- Atrium
- Bus Line
- Freeway Visibility
ABOUT KING OF PRUSSIA & WAYNE
Bordering the expansive walking trails at Valley Forge National Park, King of Prussia and neighboring Wayne are two of the most sought after destinations for office tenants in Philadelphia's wealthy western suburbs.
The region's key commuter highways, including the Pennsylvania Turnpike, I-76, and Route 202, all intersect within the area. This superior highway access allows local office tenants to attract employees from nearly all corners of Southeastern Pennsylvania. Major technology, defense, healthcare, and financial tenants, including Fiserv, Vanguard, Vertex, and Lockheed Martin, all maintain large offices in King of Prussia and Wayne.
Meanwhile, the local Radnor Township and Upper Merion School Districts are among the best performing in the country and have helped attract a skilled workforce to the area.
King of Prussia Mall is the second-largest Mall in the U.S. by square footage and offers an exceptional array of retail options for local office tenants. The award-winning Village at Valley Forge development also consists of a diverse range of luxury apartments. Over 15 bars, cafes, and restaurants all connect via walking paths and help attract and retain a growing number of young professionals.
ABOUT THE OWNER
OTHER PROPERTIES IN THE WESTOVER COMPANIES PORTFOLIO
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Valley Forge Square I | King Of Prussia, PA 19406
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