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Architecture

“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

Interior Design

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.

Green Living

  • High-efficiency HVAC systems
  • Low-emittance windows
  • Solar shades for passive energy reduction
  • Reduced flow sinks & showers and low-flow toilets
  • Drought-tolerant landscaping requiring minimal water
  • 100% smoke free

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 Awards

  • Washington Business Journal logo

    Washington Business Journal

    Winner of the 2025 Best Conversion Award

  • WBC logo

    WBC Craftsmanship Award

    Annex on 12th is pleased to take home the Washington Building Congress Craftmanship Award for masonry.