The typical asking rate per listing is in the $10's per square foot per year. The South Salt Lake region is going through a an increase in rates. In the last 3 months, the median rate rose $14 per sqft per year.
In the last 90 days, 4 listings have come on the market, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 200% of the office spaces in the South Salt Lake 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 1,000 sqft. Most properties in this area are close to 2 stories. Most buildings in this region were built in 1975 and are Class C.