On average, listings lease in the $10's per square foot per year. The Centralia submarket is seeing a a rise in rates. In the last 3 months, the median rate rose $16 per sqft per year.
In the last 90 days, 1 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 610 sqft. Most properties in this area are approximately 1 floors. Most buildings in this area were built in 1960 and are Class C.