On average, listings lease in the $20's per square foot per year. The Las Vegas region is experiencing a a rise in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 10% rise in rent.
In the last 90 days, 509 listings have come on the market, so you'll want to check back regularly for new listings. About 2% of the available leases in the Las Vegas are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,420 sqft. Most properties in this area are close to 2 floors. Most buildings in this region were built in 1999 and are Class B.