Most listings are in the $30's per square foot per year. The Hacienda Heights region is going through a a boost in rates. In the last 3 months, the median rate rose $40 per sqft per year. That's a Inf% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Hacienda Heights region has more expensive rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 2 listings have been made available, which means spaces might be going fast. You'll want to be prepared to make an offer immediately. 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 800 sqft. Most properties in this area are around 1 stories. Most buildings in this market were built in 1979 and are Class C.