Most listings are in the $50's per square foot per year. The Palm Beach region is seeing a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 2% decline in rent.
Compared to the rest of the Palm Beach market, the Palm Beach region has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 26 listings have come on the market, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 50% of the listings in the Palm Beach 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 480 sqft. Most properties in this area are around 3 floors. Most buildings in this market were built in 1973 and are Class B.