On average, listings lease in the $10's per square foot per year. The Windsor Heights submarket is going through a a boost in rates. In the last 3 months, the median rate rose $15 per sqft per year.
In the last 90 days, 4 listings have come on the market, which means new availabilities might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 25% of the available leases in the Windsor Heights are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 360 sqft. Most properties in this area are close to 2 stories. Most buildings in this area were built in 1975 and are Class B.