In the last 90 days, 5 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 350 sqft. Most buildings in this market are around 3 stories. Most buildings in this region were built in 1915 and are Class A.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Waste services is the dominant industry in this area. Most of the folk of Allen work from home. Commuting under 5 minutes a day is the norm for those who opt to reside in this part of town.