Most listings are in the $10's per square foot per year. The Sun City region is going through a decline in rates. In the last 3 months, the median rate decreased $11 per sqft per year. That's a 40% decline in rent.
Compared to the rest of the Phoenix Metropolitan Area market, the Sun City region has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 9 listings have been listed, 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,490 sqft. Most properties in this market are around 1 floors. Most buildings in this area were built in 1985 and are Class B.