On average, listings lease in the $20's per square foot per year. The Fountain Hills submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $24 per sqft per year.
Compared to the rest of the Phoenix Metropolitan Area market, the Fountain Hills region has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 7 listings have been made available, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,070 sqft. Most properties in this market are around 2 stories. Most buildings in this market were built in 1998 and are Class B.