The Platt Building, Historic highrise in Broadway Theater District, Los Angeles, United States

The Platt Building is a twelve-story, 150-foot highrise at 834 South Broadway in downtown Los Angeles, built in 1927 to the legal height limit of the time. Architects Walker & Eisen gave it a Gothic Revival design, with a steel-framed concrete structure and a terra cotta facade.

The Platt Building was built in 1927 to a design by Walker & Eisen, the firm behind Los Angeles landmarks such as the Fine Arts Building and the James Oviatt Building. Its original tenant was the Platt Music Corporation, which ran a concert hall occupying an entire floor. In 1964 Annette and Jack Needleman began buying property in the area and renamed this and several other buildings Anjac Fashion, a portmanteau of their first names. In 1979 the Broadway Theater and Commercial District was added to the National Register of Historic Places, with the Anjac Fashion Building at 834 S. Broadway listed as a contributing property.

The building housed the Platt Music Corporation's concert hall, which became a hub for musicians and music lovers in downtown Los Angeles. This performance space shaped the area's cultural identity during the early twentieth century.

The building is located in the active theater district along Broadway and is surrounded by other theaters and shops. It is accessible on foot and near several public transit stops in the area.

The building's 1979 National Register listing is under the name Anjac Fashion Building, not Platt Building, as a contributing property to the Broadway Theater and Commercial District. The Broadway Bar moved in in 2005.