Most listings are in the $20's per square foot per year. The Winchester submarket is experiencing a a rise in rates. In the last 3 months, the median rate rose $28 per sqft per year.
Compared to the rest of the Las Vegas–Henderson–Paradise market, the Winchester region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 11 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 418% of the listings in the Winchester 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 800 sqft. Most buildings in this region are close to 2 floors. Most buildings in this market were built in 1981 and are Class B.