On average, listings lease in the $20's per square foot per year. The Harris County region is going through a a boost in rates. In the last 3 months, the median rate went up $22 per sqft per year.
In the last 90 days, 2607 listings have come on the market, so you'll want to check back regularly for new listings. About 63% of the available space in the Harris County are subleases, so you might be able to find a shorter term or below market rent. 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 1,370 sqft. Most buildings in this market are approximately 2 floors. Most buildings in this area were built in 1982 and are Class B.