Armonk Professional Center: A Boutique Main Street Campus 36,000 SF of Architecturally Significant Office Space | Design-Build by Vatche Simonian The Armonk Professional Center (355 & 357 Main Street) is a boutique office campus that seamlessly blends midcentury character with contemporary functionality. Anchoring the northern end of Armonk’s walkable Main Street, the property offers a rare combination of village charm and institutional-grade management.