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


“Our approach was to breathe new life into the Annex while honoring its historic character. Inspired by the building’s past and art deco heritage, we created color-filled social spaces that are invigorating yet soothing, reflecting contemporary living. Bespoke rugs, architectural details, materials, and woven textures reinterpret the original art deco spirit. We designed memorable spaces that celebrate the surrounding views of D.C.” -Champalimaud
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.
ULI Washington 2026 award for Excellence in Adaptive Reuse
Winner of the 2025 Best Conversion Award
Annex on 12th is pleased to take home the Washington Building Congress Craftmanship Award for masonry.



