The typical asking rate per listing is in the $10's per square foot per year. The Pasadena submarket is going through a a rise in rates. In the last 3 months, the median rate rose $16 per sqft per year.
Compared to the rest of the Houston Metro market, the Pasadena submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 6 listings have been posted online, which means leases might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 150% of the available space in the Pasadena are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,410 sqft. Most buildings in this market are around 1 floors. Most buildings in this area were built in 1985 and are Class B.