Most listings are in the $20's per square foot per year. The Pomona region is experiencing a decrease in rates. In the last 3 months, the median rate decreased $5 per sqft per year. That's a 18% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Pomona region has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 16 listings have come on the market, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 13% of the office spaces in the Pomona are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 4,250 sqft, there are still 0 leases below 2,000 sqft. Most properties in this market are close to 2 floors. Most buildings in this region were built in 1983 and are Class B.