On average, listings lease in the $20's per square foot per year. The Arvada submarket is experiencing a a rise in rates. In the last 3 months, the median rate increased $25 per sqft per year.
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 region.
In the last 90 days, 16 listings have been made available, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 50% of the available space in the Arvada 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,890 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1985 and are Class B.