On average, listings lease in the $20's per square foot per year. The Farmers Branch 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 DFW Metroplex market, the Farmers Branch region has more expensive rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 381 listings have been made available, so you'll want to check back regularly for new listings. About 2% of the listings in the Farmers Branch are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 500 sqft. Most buildings in this market are around 4 floors. Most buildings in this region were built in 1982 and are Class A.