1355 Market Street, also known as Market Square / The Mart SF, is a landmark Class A creative office and retail property located in the heart of San Francisco’s Mid-Market district. Originally constructed in 1937 as the Western Furniture Exchange and Merchandise Mart, the building is a historic Art Deco icon that has been extensively renovated to support modern workplace and retail demands while preserving its architectural character. Today, 1355 Market Street offers a compelling combination of historic architecture, modern infrastructure, sustainability features, and transit-oriented access, with ground-floor retail and food hall space activating the streetscape and serving both tenants and the surrounding community. The building is professionally managed and positioned as one of Mid-Market’s most recognizable and adaptable commercial assets.