On average, listings lease in the $20's per square foot per year. The Arvada region is experiencing a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 9% increase in rent.
Compared to the rest of the Denver Metro market, the Arvada submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 18 listings have come on the market, which means new listings most likley are going fast. 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 1,400 sqft. Most buildings in this market are close to 2 floors. Most buildings in this market were built in 1985 and are Class B.