On average, listings lease in the $20's per square foot per year. The North Palm Beach submarket is going through a a boost in rates. In the last 3 months, the median rate increased $21 per sqft per year.
Compared to the rest of the Gold Coast market, the North Palm Beach submarket has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 3 listings have come on the market, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 200% of the available leases in the North Palm Beach 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 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 buildings in this market are approximately 4 stories. Most buildings in this market were built in 1984 and are Class B.