On average, listings lease in the $20's per square foot per year. The McKinney region is seeing a decline in rates. In the last 3 months, the median rate decreased $9 per sqft per year. That's a 28% decrease in rent.
Compared to the rest of the DFW Metroplex market, the McKinney submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 37 listings have been listed, which means office spaces might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 8% of the available leases in the McKinney are subleases, so you will probably have to consider a longer term lease. 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 2,500 sqft. Most buildings in this market are around 2 stories. Most buildings in this market were built in 2006 and are Class A.