Most listings are in the $20's per square foot per year. The Galveston region is seeing a a boost in rates. In the last 3 months, the median rate increased $23 per sqft per year.
Compared to the rest of the Houston Metro market, the Galveston submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 29 listings have come on the market, which means listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 48% of the available leases in the Galveston 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 1,530 sqft. Most buildings in this area are close to 2 stories. Most buildings in this area were built in 1977 and are Class B.