On average, listings lease in the $20's per square foot per year. The Alhambra region is experiencing a a boost in rates. In the last 3 months, the median rate rose $27 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Alhambra region has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 4 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 25% of the available space in the Alhambra 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.
The standard measurement for office space in this area is around 1,200 sqft. Most properties in this market are close to 3 floors. Most buildings in this market were built in 1982 and are Class B.