Most listings are in the $20's per square foot per year. The Wasilla region is going through a an increase in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 15% rise in rent.
In the last 90 days, 15 listings have been posted online, which means listings are probably 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 1,820 sqft. Most properties in this area are approximately 2 floors.