On average, listings lease in the $30's per square foot per year. The West Covina submarket is going through a a boost in rates. In the last 3 months, the median rate increased $38 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the West Covina submarket has higher rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 42 listings have been made available, so you'll want to check back regularly for new listings. About 26% of the listings in the West Covina are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 750 sqft. Most properties in this area are approximately 3 floors. Most buildings in this area were built in 1980 and are Class B.