The typical asking rate per listing is in the $20's per square foot per year. The Arvada submarket is going through a a rise in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 14% rise 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 discounted region.
In the last 90 days, 9 listings have been made available, which means spaces 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,340 sqft. Most buildings in this area are close to 2 stories. Most buildings in this region were built in 1985 and are Class B.