Annex on 12th

The Annex on 12th is a rental community at 300 12th Street SW in historic Southwest DC, where heritage architecture houses renovated apartments and penthouses. Homes have oversized windows, spacious floor plans, warm wood cabinetry, stainless-steel appliances, and kitchen islands, with views of the National Mall and Washington Monument. The rooftop has an infinity pool, a lounge for entertaining, and a private dining space. Residents also have a speakeasy lounge, a media lounge with a kitchen, a fitness center with a yoga space and spin studio, a coworking lounge with conference rooms, and courtyards.

Annex on 12th is a rental building at 300 12th St SW in Southwest Waterfront, Washington, DC, built in 2024.

28 apartments are listed right now: 5 studios at $2,096–$2,350 a month, 17 one-bedrooms at $2,612–$7,345 a month, 4 two-bedrooms at $3,886–$5,281 a month, and 2 three-bedrooms at $5,400–$10,950 a month. Asking rents across the building run $2,096 to $10,950 per month. Pricing was last verified on October 27, 2026.

Residents have access to billiards room, garden lounge, package lockers and mail room, private media lounge, parlor, luxury car share access, rooftop lounge, on-site management team, and 12 more amenities.