The typical asking rate per listing is in the $20's per square foot per year. The Arlington submarket is experiencing a a rise in rates. In the last 3 months, the median rate rose $21 per sqft per year.
Compared to the rest of the DFW Metroplex market, the Arlington submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 61 listings have come on the market, so you'll want to check back regularly for new listings. About 110% of the available space in the Arlington 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,860 sqft. Most buildings in this region are approximately 2 floors. Most buildings in this region were built in 1985 and are Class B.