On average, listings lease in the $10's per square foot per year. The Lewisville submarket is seeing a a boost in rates. In the last 3 months, the median rate increased $0 per sqft per year. That's a 1% rise in rent.
Compared to the rest of the DFW Metroplex market, the Lewisville region has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 21 listings have been made available, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,200 sqft. Most properties in this market are close to 1 floors. Most buildings in this area were built in 2000 and are Class B.