Long Beach Professional Building, Art Deco medical office building in downtown Long Beach, United States.

The Long Beach Professional Building is an eight-story commercial structure made of cast concrete in downtown Long Beach, located at 117 East 8th Street. The construction features geometric patterns on its facade and was built to serve as office space for medical professionals.

The building was designed in 1929 by architect William Douglas Lee and became the first large medical office building in Long Beach. It marked an important development in the city's healthcare infrastructure.

The building's name reflects its original purpose: it was the city's first large office building devoted exclusively to medicine. Its pink and black lobby, retained through the 2018 renovation by KTGY Architecture + Planning, is a detail visitors can still see from the entrance area.

The building now operates as Regency Palms, offering residential services for older adults managed by Meridian Senior Living. Visitors can view the exterior facade and architectural details from the street.

The building is credited with introducing elements later common in the "WPA Moderne" style of the 1930s, before that term existed. Its 2018 renovation was carried out by KTGY Architecture + Planning, which adapted the former medical offices into an assisted living and memory care facility called Regency Palms.