A Historic Building Just Came Down in MoCo. Here's What's Going in Its Place.

Last week, demolition crews moved onto 204 acres in Clarksburg. The building they're taking down was designed by Cesar Pelli, the Argentine-American architect behind the Petronas Twin Towers. It was the former headquarters of COMSAT Laboratories, the research division of the Communications Satellite Corp., where scientists invented real-time international phone communication and produced live television broadcasts from space. After nearly 20 years of sitting dormant, the structure is coming down.

What goes up in its place will be one of the largest mixed-use developments in Montgomery County history.

What Happened and When

River Falls Investments, a Bethesda-based development company, has owned the 204-acre property at 22300 Comsat Drive since 2015. For most of that decade, the project was stalled over a single question: did the Pelli-designed building qualify as a historic landmark? On April 15, that question was resolved. The Maryland-National Capital Park and Planning Commission formally adopted the Clarksburg Gateway Sector Plan. Demolition began days later.

The next step is a sectional map amendment to complete the zoning process, expected by late summer or fall. River Falls is already developing concept plans.

"We're just excited to get going, to start being able to tell a very different story about the property," River Falls' Elliott told Bethesda Today the week the sector plan was adopted.

What It Means for the MoCo Market

The Clarksburg site sits east of I-270, about a mile from the Clarksburg Premium Outlets, surrounded by established residential communities. Its development adds 204 acres of new mixed-use inventory to a county that has been absorbing major capital commitments at a steady pace. Viva White Oak represents $2.8 billion in committed development.

AstraZeneca opened a $300 million facility in Rockville. Global developer Hines is now the master developer for the 13.9-acre North Bethesda Metro innovation campus, anchored by the University of Maryland Institute for Health Computing.

These are not coincidences. They reflect a county with the infrastructure, the workforce, and the planning apparatus to attract serious long-term investment. Every credible project that breaks ground here reinforces the case for property in Bethesda, Potomac, and Rockville. The market in those corridors holds its value for structural reasons, and stories like this one are part of that structure.

For buyers evaluating the long view, county-wide momentum matters. You are not just buying a house. You are buying into a county that has a documented track record of converting dormant land into productive communities.

The COMSAT site is the latest example, and it is a significant one.