LEED Gold Certified
Annex on 12th achieved LEED Gold level certification for implementing practical and measurable solutions in areas including sustainable site development, water savings and energy efficiencies.
“Annex on 12th isn’t just a place to live, it’s a piece of history reimagined for the future. We transformed a vacant office into a vibrant community. The project honors the rich history while preserving architectural elements that enhance its connection to the neighborhood.” -Eric Wohnsigl


Annex on 12th transforms a 1936 DC industrial icon into a bold, modern retreat. Art Deco lines meet rich woods, marble, and teal and brass accents, with crisp residences and elevated, one-of-a-kind amenities rising through a new 13 story tower.
Annex on 12th achieved LEED Gold level certification for implementing practical and measurable solutions in areas including sustainable site development, water savings and energy efficiencies.
Winner of the 2025 Best Conversion Award
Annex on 12th is pleased to take home the Washington Building Congress Craftmanship Award for masonry.


