On average, listings lease in the $20's per square foot per year. The Brea submarket is experiencing a decline in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 12% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Brea submarket has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 15 listings have been made available, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 27% of the listings in the Brea are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 3,840 sqft, there are still 0 listings below 2,000 sqft. Most properties in this region are around 2 stories. Most buildings in this market were built in 1985 and are Class B.