On average, listings lease in the $30's per square foot per year. The Plainview region is going through a an increase in rates. In the last 3 months, the median rate increased $36 per sqft per year.
In the last 90 days, 11 listings have come on the market, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 64% of the available space in the Plainview are subleases, so you might be able to snag a great spot on a short term. 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 1,600 sqft. Most buildings in this market are around 3 floors. Most buildings in this area were built in 1965 and are Class B.