The typical asking rate per listing is in the $20's per square foot per year. The Gilbert region is going through a decline in rates. In the last 3 months, the median rate decreased $0 per sqft per year. That's a 0% decrease in rent.
Compared to the rest of the Phoenix Metropolitan Area market, the Gilbert region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 44 listings have come on the market, so you'll want to check back regularly for new listings. About 2% 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,060 sqft. Most properties in this region are approximately 2 floors. Most buildings in this market were built in 2006 and are Class B.