In the last 90 days, 20 listings have been made available, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 10% of the office spaces in the Boerne are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 4,100 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this area are around 2 floors. Most buildings in this area were built in 2008 and are Class B.