The typical asking rate per listing is in the $10's per square foot per year. The Pasadena region is going through a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 4% decrease in rent.
Compared to the rest of the Houston Metro market, the Pasadena region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 6 listings have come on the market, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 530 sqft. Most properties in this region are close to 2 stories. Most buildings in this market were built in 1988 and are Class B.