Almost all of SoHo is included in the SoHo–Cast Iron Historic District, which was designated by the New York City Landmarks Preservation Commission in 1973, extended in 2010, and was listed on the National Register of Historic Places and declared a National Historic Landmark in 1978.
Hampir seluruh SoHo tercakup dalam SoHo-Cast Iron Historic District, yang ditetapkan oleh New York City Landmarks Preservation Commission pada 1973, dan diperluas tahun 2010 dan terdaftar di National Register of Historic Places dan ditetapkan sebagai National Historic Landmark pada 1978.