QR Code Link to This Post At Knollwood Apartment Homes, you will experience unique Hazelwood living at an affordable price! Apartments in Hazelwood, MO is one of the best locations that Northwest County has to offer. We are just minutes from I-270, 370, Lindbergh & Earth City. Our excellent off-the-highway location between North and West counties allows residents quick access to local hot-spots for shopping and dining, as well as the Lambert St. Louis International Airport.