The typical asking rate per listing is in the $30's per square foot per year. The Covina submarket is seeing a a boost in rates. In the last 3 months, the median rate increased $17 per sqft per year. That's a 92% rise in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Covina region has greater rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 12 listings have been listed, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. 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 2,440 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this region were built in 1981 and are Class B.