The typical asking rate per listing is in the $60's per square foot per year. The Lewisville submarket is going through a an increase in rates. In the last 3 months, the median rate rose $41 per sqft per year. That's a 163% rise in rent.
Compared to the rest of the DFW Metroplex market, the Lewisville submarket has greater rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 11 listings have been made available, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 100% of the listings in the Lewisville 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 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 180 sqft. Most properties in this region are approximately 1 floors. Most buildings in this region were built in 2000 and are Class B.