O&S designed a new 4-story garment manufacturing building in Astoria, Queens, with textile production areas, office spaces, rooftop solar canopies, and compliance with NYC’s Energy Code and sustainable roofing requirements.

O&S Associates delivered full design services for H Mart's 35,000 SF space at American Dream Mall, completing a grocery area and food court with commercial kitchens, emergency systems, and public amenities.

O&S Associates provided design and oversight for the comprehensive restoration of the Belgravia Hotel, a Beaux-Arts historic landmark. The project included the restoration of terracotta masonry, window replacement, and the preservation of the cast iron canopy, earning prestigious awards.