The median home value in Marriottsville, MD is $669,990. The national median home value is $338,100. The average price of homes sold in Marriottsville, MD is $669,990. Marriottsville real estate listings include condos, townhomes, and single family homes for sale. Commercial properties are also available. If you see a property you’re interested in, contact a Marriottsville real estate agent to arrange a tour today!