Today 21045, Columbia MD is count around 39 homes for sale at current average listing price of $532,337. Nearby neighborhoods of 21045 are Village Of Long Reach, None Available, Village Of Owen Brown, Oakland Mills, Columbia Park, Hopewell, Long Meadow, Arborside At Kendall Ridge, Dalton Springs, Ecker's Hollow. Most of 21045 homes are 4 bedrooms with 3 bathrooms.