The typical asking rate per listing is in the $20's per square foot per year. The Henderson region is experiencing a a boost in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 8% rise in rent.
Compared to the rest of the Las Vegas–Henderson–Paradise market, the Henderson submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 106 listings have been listed, so you'll want to check back regularly for new listings. About 1% of the available leases in the Henderson are subleases, so you will probably have to focus your search on direct office leases. 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 1,970 sqft. Most buildings in this area are close to 2 stories. Most buildings in this area were built in 2003 and are Class B.