The typical asking rate per listing is in the $10's per square foot per year. The St. George region is going through a an increase in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 10% rise in rent.
In the last 90 days, 33 listings have been listed, which means spaces might be going fast. You'll want to be prepared to make an offer immediately. About 24% of the available space in the St. George are subleases, so you might be able to snag a great spot on a short term. 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 1,500 sqft. Most buildings in this region are approximately 2 stories. Most buildings in this market were built in 1998 and are Class B.