The typical asking rate per listing is in the $20's per square foot per year. The Sparks region is experiencing a a boost in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 11% increase in rent.
In the last 90 days, 19 listings have been made available, which means spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 121% of the available leases in the Sparks are subleases, so you might be able to find a shorter term or below market rent. 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 1,000 sqft. Most buildings in this market are around 1 stories. Most buildings in this region were built in 1981 and are Class B.