Compared to the rest of the Metropolitan Los Angeles market, the Covina region has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 10 listings have been listed, which means spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 170% of the listings in the Covina are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 2,600 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this region are approximately 2 floors. Most buildings in this region were built in 1980 and are Class B.