Baseline Annex has recently under gone renovation, both interior and exterior. The parking lot has limited but reserved covered parking spaces. Each of the perimeter offices have a window. Being surrounded by trees makes the Annex a treat during the summer months. Baseline Annex is located in Mesa Arizona on the Northeast corner of Alma School Rd and Baseline Rd. It is part of a very busy and productive set of cross streets. It sits next to the prestigious corporate building of Michael A. Pollack Real Estate Investments.