On average, listings lease in the $20's per square foot per year. The Vancouver region is going through a a boost in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 8% rise in rent.
Compared to the rest of the Greater Portland market, the Vancouver region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 31 listings have been made available, which means listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 3% of the available space in the Vancouver are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 2,830 sqft, there are still 0 listings below 2,000 sqft. Most properties in this region are close to 2 floors. Most buildings in this area were built in 1993 and are Class A.