Compared to the rest of the Metropolitan Los Angeles market, the Walnut region has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 2 listings have been made available, which means leases are probably going fast. 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 800 sqft. Most properties in this region are close to 1 floors. Most buildings in this market were built in 1987.