Compared to the rest of the Metropolitan Los Angeles market, the La Habra submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 9 listings have been made available, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 11% of the available leases in the La Habra 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 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 400 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1981 and are Class B.