On average, listings lease in the $20's per square foot per year. The Gilbert submarket is seeing a a boost in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 6% rise in rent.
Compared to the rest of the Phoenix Metropolitan Area market, the Gilbert submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 95 listings have been made available, so you'll want to check back regularly for new listings. About 1% of the office spaces in the Gilbert 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 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 2,110 sqft. Most buildings in this market are around 1 stories. Most buildings in this market were built in 2006 and are Class B.