The typical asking rate per listing is in the $20's per square foot per year. The Brazoria County region is going through a a boost in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 8% increase in rent.
In the last 90 days, 28 listings have been listed, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 4% of the available space in the Brazoria County are subleases, so you will probably have to consider a longer term lease. 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 1,700 sqft. Most properties in this market are approximately 1 floors. Most buildings in this market were built in 1999 and are Class A.