Most listings are in the $20's per square foot per year. The Harris County region is seeing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 5% decline in rent.
In the last 90 days, 2516 listings have been made available, so you'll want to check back regularly for new listings. About 4% of the listings 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 1,190 sqft. Most buildings in this market are around 3 floors. Most buildings in this region were built in 1982 and are Class B.