In the last 90 days, 2 listings have been made available, which means spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 500% of the available space in the Rockwall are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 280 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this area were built in 2006 and are Class B.