On average, listings lease in the $20's per square foot per year. The Harris County submarket is going through a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 7% decline in rent.
In the last 90 days, 2607 listings have been listed, so you'll want to check back regularly for new listings. About 3% of the office spaces in the Harris County are subleases, so you will probably have to focus your search on direct office leases. 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 1,160 sqft. Most properties in this area are around 3 stories. Most buildings in this region were built in 1982 and are Class B.