The vacancy rate for retail space in Tomball and Magnolia dipped slightly in the third quarter of 2017 to 13.1 percent from 14.1 percent in the second quarter of 2017. Around 185,000 square feet of space remain unoccupied with an additional 5,500 square feet under construction. Market Data provided by Caldwell Companies 7904 N. Sam Houston Parkway, fourth floor Houston, TX 77064