Hair Studio 3940 is located in Suite D of the 783 Station Street building in historic downtown Herndon. The shop is best accessed by parking behind the building or near the caboose on Lynn Street. It can also be found by walking through the breezeway from Station Street to the back of the building. The hair salon has a loyal following, with some customers visiting for more than 10 years. It provides full hair care and treatments found in larger salons.