1 South First

1 South First is a rental apartment building at 1 South First Street in Williamsburg, Brooklyn, developed and managed by Two Trees Management. It is one of the residential buildings on the former Domino Sugar Refinery site, the eleven-acre stretch of East River waterfront that Two Trees has been redeveloping around the landmarked refinery structure.

The building faces Domino Park, the six-acre waterfront park built on the old refinery piers, with the Williamsburg Bridge immediately south and Manhattan directly across the water. The L train at Bedford Avenue is a short walk east, the NYC Ferry East River route stops at North 6th Street, and the bars, restaurants and shops of Berry Street, Wythe Avenue and Kent Avenue are all within a few blocks.

Completed in 2019 and designed by COOKFOX Architects, the 45-story tower was the tallest building in Williamsburg when it opened. Its white facade is patterned after the molecular structure of a sugar crystal, a reference to the refinery that once stood here.

Its 330 apartments include income-restricted units under the Domino site’s affordable housing agreement, and the ground floor holds shops and restaurants facing the park. Upper floors look across the river to the Lower East Side and Midtown, with the Williamsburg Bridge directly to the south. One Domino Square, completed in 2024 a block away, is now the site’s tallest building.