Hoefer Wysocki designed. Raintree Exchange is a beautiful modern two-story, 36,000 sq. ft., medical office building located in the Twin Creeks Medical District of Allen. This exquisite site is across from the Texas Health Presbyterian Hospital of Allen and the new Pinstack bowling alley. Just off the North Central Expressway, this property features ample parking as well as an outdoor garden path and waterfall. It also has easy access to SH 121 and President George Bush Turnpike. The beautiful window-lined exterior leads into the high-end interior finishes throughout the building.