Onyx Equities, a real estate investment firm, acquired the former AT&T regional headquarters at 340 Mount Kemble in Morristown, NJ, with a vision to modernize the 1980s structure into a Class A suburban office.
Challenge
Repositioning a vacant, end-of-life office building called for strategic upgrades that would improve tenant appeal while balancing cost and long-term value. The design also needed to enhance the building’s identity, performance, and amenity offering to compete in a changing suburban office market.
Solution
We developed a concept design informed by cost-benefit analysis, focusing on the exterior skin, main atrium, and amenities. A new glass façade and enhancements to the four-story atrium, including a wood slat ceiling and glare-reducing glass film, improved performance and experience. A 25,000-square-foot amenity wing introduced a cafeteria, conference center, fitness facilities, and social spaces, while upgraded HVAC systems improved air quality and efficiency.
Outcome
The transformation repositioned 340 Mount Kemble as a premier suburban office destination, supporting tenant attraction and long-term asset value. Modern amenities, improved performance, and a refreshed identity contribute to a healthier, more competitive workplace aligned with evolving market demands.
Marketing renderings developed during the concept phase contributed to the pre-leasing of 200,000 square feet in the building’s north wing.
A 25,000-square-foot amenity wing introduced a cafeteria, conference center, fitness facilities, lounge spaces, and a game room to support tenant wellness and engagement.
Separate HVAC systems were introduced for each building wing to improve air quality, circulation, and operational performance
