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Fuse at Mason Square 3401 Fairfax Dr 1,609 - 98,608 SF of 5-Star Space Available in Arlington, VA 22201
HIGHLIGHTS
- Cutting-edge, purpose-built smart technology building centered on innovation, offering flexible lab and office space with customization options.
- Unique features such as a podcast studio and specialized labs, including robotics, VR, simulation, network, data visualization, and secure facilities.
- Access to the region's biggest tech talent pipeline, world-class faculty, specialized labs, equipment, and secure facilities.
- Supports large-scale flexible conference facilities that can accommodate up to 750 people, with direct access to host an additional 1,400 people.
- Additional on-site conveniences include a fitness center, conferencing options, and outdoor amenities.
- Situated in a prominent tech corridor with easy access to Interstate 66 and within walking distance of two Metro stations and numerous restaurants.
ALL AVAILABLE SPACES(11)
Display Rental Rate as
- SPACE
- SIZE
- TERM
- RENTAL RATE
- SPACE USE
- CONDITION
- AVAILABLE
Street-level retail space. Contact broker for more information.
- Rate includes utilities, building services and property expenses
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
Spec suite delivered in 2025. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
SCIF space. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
Spec suite delivered in December 2025. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
- Can be combined with additional space(s) for up to 10,111 SF of adjacent space
Spec suite delivered in December 2025. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Can be combined with additional space(s) for up to 10,111 SF of adjacent space
Spec suite delivered in December 2025. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Can be combined with additional space(s) for up to 10,111 SF of adjacent space
Full-floor availability featuring an outdoor terrace. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Balcony
- Office intensive layout
- Can be combined with additional space(s) for up to 44,890 SF of adjacent space
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Space is in Excellent Condition
- Office intensive layout
- Can be combined with additional space(s) for up to 44,890 SF of adjacent space
| Space | Size | Term | Rental Rate | Space Use | Condition | Available |
| 1st Floor | 1,609 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Retail | Shell Space | Now |
| 4th Floor | 3,000-14,213 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Shell Space | Now |
| 4th Floor, Ste 450 | 1,790 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Full Build-Out | Now |
| 5th Floor | 3,000-12,479 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Shell Space | Now |
| 6th Floor | 3,000-10,098 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Shell Space | Now |
| 7th Floor, Ste 750 | 3,418 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Shell Space | Now |
| 7th Floor, Ste A | 1,861 SF | 5-10 Years | Upon Request Upon Request Upon Request Upon Request | Office | Spec Suite | Now |
| 7th Floor, Ste B | 1,976 SF | 5-10 Years | Upon Request Upon Request Upon Request Upon Request | Office | Spec Suite | Now |
| 7th Floor, Ste C | 6,274 SF | 5-10 Years | Upon Request Upon Request Upon Request Upon Request | Office | Spec Suite | Now |
| 8th Floor | 18,086 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Shell Space | Now |
| 9th Floor | 26,804 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Shell Space | Now |
1st Floor
| Size |
| 1,609 SF |
| Term |
| Negotiable |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Retail |
| Condition |
| Shell Space |
| Available |
| Now |
4th Floor
| Size |
| 3,000-14,213 SF |
| Term |
| Negotiable |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Shell Space |
| Available |
| Now |
4th Floor, Ste 450
| Size |
| 1,790 SF |
| Term |
| Negotiable |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Full Build-Out |
| Available |
| Now |
5th Floor
| Size |
| 3,000-12,479 SF |
| Term |
| Negotiable |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Shell Space |
| Available |
| Now |
6th Floor
| Size |
| 3,000-10,098 SF |
| Term |
| Negotiable |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Shell Space |
| Available |
| Now |
7th Floor, Ste 750
| Size |
| 3,418 SF |
| Term |
| Negotiable |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Shell Space |
| Available |
| Now |
7th Floor, Ste A
| Size |
| 1,861 SF |
| Term |
| 5-10 Years |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Spec Suite |
| Available |
| Now |
7th Floor, Ste B
| Size |
| 1,976 SF |
| Term |
| 5-10 Years |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Spec Suite |
| Available |
| Now |
7th Floor, Ste C
| Size |
| 6,274 SF |
| Term |
| 5-10 Years |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Spec Suite |
| Available |
| Now |
8th Floor
| Size |
| 18,086 SF |
| Term |
| Negotiable |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Shell Space |
| Available |
| Now |
9th Floor
| Size |
| 26,804 SF |
| Term |
| Negotiable |
| Rental Rate |
| Upon Request Upon Request Upon Request Upon Request |
| Space Use |
| Office |
| Condition |
| Shell Space |
| Available |
| Now |
1st Floor
| Size | 1,609 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Retail |
| Condition | Shell Space |
| Available | Now |
Street-level retail space. Contact broker for more information.
- Rate includes utilities, building services and property expenses
4th Floor
| Size | 3,000-14,213 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Shell Space |
| Available | Now |
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
4th Floor, Ste 450
| Size | 1,790 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Full Build-Out |
| Available | Now |
Spec suite delivered in 2025. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Fully Built-Out as Standard Office
- Office intensive layout
- Space is in Excellent Condition
5th Floor
| Size | 3,000-12,479 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Shell Space |
| Available | Now |
SCIF space. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
6th Floor
| Size | 3,000-10,098 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Shell Space |
| Available | Now |
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
7th Floor, Ste 750
| Size | 3,418 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Shell Space |
| Available | Now |
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
7th Floor, Ste A
| Size | 1,861 SF |
| Term | 5-10 Years |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Spec Suite |
| Available | Now |
Spec suite delivered in December 2025. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 10,111 SF of adjacent space
7th Floor, Ste B
| Size | 1,976 SF |
| Term | 5-10 Years |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Spec Suite |
| Available | Now |
Spec suite delivered in December 2025. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Can be combined with additional space(s) for up to 10,111 SF of adjacent space
7th Floor, Ste C
| Size | 6,274 SF |
| Term | 5-10 Years |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Spec Suite |
| Available | Now |
Spec suite delivered in December 2025. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Can be combined with additional space(s) for up to 10,111 SF of adjacent space
8th Floor
| Size | 18,086 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Shell Space |
| Available | Now |
Full-floor availability featuring an outdoor terrace. Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 44,890 SF of adjacent space
- Balcony
9th Floor
| Size | 26,804 SF |
| Term | Negotiable |
| Rental Rate | Upon Request |
| Space Use | Office |
| Condition | Shell Space |
| Available | Now |
Contact broker for more information.
- Rate includes utilities, building services and property expenses
- Office intensive layout
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 44,890 SF of adjacent space
PROPERTY OVERVIEW
Fuse at Mason Square is a one-of-a-kind research and technology hub providing an innovation destination with best-in-class amenities in the prominent Rosslyn-Ballston corridor. With purpose-driven research labs and business office space at its core, this 10-story building boasts a striking centralized ground-floor atrium, expansive lobby, and a spacious green roof accompanied by multiple terraces. Fuse offers an environment to support flexible collaboration directly or indirectly with early-stage, emerging growth, and established technology companies. Various suites and full-floor opportunities are available where academic and industry spaces may be co-located on several building floors and spread around unique collaboration zones to spark innovative and entrepreneurial business opportunities. A retreat for digital innovators, researchers, and entrepreneurs to interact and thrive, Fuse at Mason Square combines customizable, secure facilities with world-class convening spaces and amenities. Tenants will have access to the superior advantages of this all-encompassing advanced technology haven, from bespoke labs and infrastructure to an unmatched location as the area’s largest concentration of research collaboration between public institutions and industry partners. Specialized labs are on-site for robotics, VR, simulation, and security data visualization. Additional trophy-level amenities include an elevated terrace café, a podcast studio/media conference room, a large conference center, a digital fitness studio, and a supportive tech concierge. Ideally located at the center of the Rosslyn-Ballston tech corridor, Fuse is at the epicenter of an emerging innovation district, serving as a beacon for tech talent, new partnerships, new companies, innovation, and inclusive economic development. The community provides easy access to Interstate 66, delivering a seamless connection into DC within minutes. Multiple Metro stops in the neighborhood help make commuting a breeze. Discover the opportunity to co-locate in a new state-of-the-art facility in a unique urban destination for research, learning, and economic development, continuing to grow as a global innovation powerhouse.
- 24 Hour Access
- Atrium
- Banking
- Bus Line
- Controlled Access
- Concierge
- Conferencing Facility
- Convenience Store
- Courtyard
- Fitness Center
- Food Service
- Metro/Subway
- Restaurant
- Security System
- Signage
- Roof Terrace
- Car Charging Station
- Demised WC facilities
- High Ceilings
- Direct Elevator Exposure
- Natural Light
- Wi-Fi
- Outdoor Seating
- Air Conditioning
- Balcony
PROPERTY FACTS
SELECT TENANTS
- Cybastion
- Cybersecurity and digital solutions company with a focus on Africa.
- George Mason University
- Virginia's largest public research university.
- Oasis
- Leadership and innovation hub for young professionals and entrepreneurs.
- Vannevar Labs
- Develops computer vision and natural language processing for the defense industry.
- Wood & Iron Gameday Restaurant And Bar
- Local sports bar offering classics with locations throughout Virginia.
SUSTAINABILITY
SUSTAINABILITY
LEED Certification Developed by the U.S. Green Building Council (USGBC), the Leadership in Energy and Environmental Design (LEED) is a green building certification program focused on the design, construction, operation, and maintenance of green buildings, homes, and neighborhoods, which aims to help building owners and operators be environmentally responsible and use resources efficiently. LEED certification is a globally recognized symbol of sustainability achievement and leadership. To achieve LEED certification, a project earns points by adhering to prerequisites and credits that address carbon, energy, water, waste, transportation, materials, health and indoor environmental quality. Projects go through a verification and review process and are awarded points that correspond to a level of LEED certification: Platinum (80+ points) Gold (60-79 points) Silver (50-59 points) Certified (40-49 points)
MARKETING BROCHURE
ABOUT VIRGINIA SQUARE
Located in the heart of Arlington, Virginia Square offers a prime office setting with exceptional connectivity and urban convenience. Positioned between Ballston and Clarendon, this area provides immediate access to major thoroughfares, including Wilson Boulevard, Washington Boulevard, and Arlington Boulevard (Route 50), as well as quick connections to I-66 for seamless travel across the region.
Virginia Square is surrounded by thriving business districts and a diverse mix of professional services, tech firms, and government contractors. Its proximity to Ballston’s office corridor and Clarendon’s retail and dining scene makes it an attractive choice for companies seeking a balanced work environment with strong networking opportunities.
The neighborhood benefits from the Virginia Square–GMU Metro station, located on the Orange and Silver Lines, which ensures easy commutes for employees and access to Dulles airport. Nearby amenities include fitness centers, coffee shops, and cultural attractions, such as the Arlington Arts Center, which create a vibrant atmosphere that supports productivity and employee well-being.
LEASING TEAMS
LEASING TEAMS
Brett Schweitzer,
Senior Vice President
With a commitment to excellence and a proactive approach to market trends, Brett has become a market leader in Northern Virginia. His dedication to fostering long-term relationships and delivering tailored solutions has made him invaluable for landlords seeking to elevate their real estate investments. When partnering with Brett and his team at CBRE, clients gain seasoned professionals who not only understand the intricacies of the Northern Virginia market, but also possess the tenacity and vision to execute highly complex real estate strategies.
ABOUT THE OWNER
OTHER PROPERTIES IN THE GEORGE MASON UNIV, COSTELLO COLLEGE OF BUSINESS PORTFOLIO
ABOUT THE ARCHITECT
OTHER PROPERTIES IN THE OTJ ARCHITECTS PORTFOLIO
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Fuse at Mason Square | 3401 Fairfax Dr
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