Sage Properties in Boise is a very special real estate brokerage. While there are thousands of eager real estate agents in Boise, there are only a few true client representation agencies in town. Founded by the master property developer, William Middleton, Sage Properties offers local experience and expertise that few others can offer in the Boise. There’s a difference between moving real estate quickly and wise property investment. Sage is for people that want to be wise.