Isabella Court is a Spanish Colonial Revival style mixed-use residential and commercial complex at 3909-3917 South Main Street in the Midtown district of Houston, Texas, United States.

[3] William Bordeaux served as the architect and designed Isabella Court, built during 1928 and 1929, as a Spanish colonial revival-style building.

[5][6] During his lifetime, architect Charles W. Moore, author of the excerpts within You Have to Pay for the Public Life, wrote that the "charming" Isabella Court had 'a serious case of what California real estate people call "deferred maintenance.

[6] On June 24, 1994 Isabella Court received listing in the National Register of Historic Places.

In 2007 the commercial space was fully leased; during that year Houston Press awarded the building the "Best Artistic Renovation.