On average, listings lease in the $30's per square foot per year. The Heathrow submarket is going through a a rise in rates. In the last 3 months, the median rate went up $6 per sqft per year. That's a 22% rise in rent.
In the last 90 days, 3 listings have come on the market, which means listings might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 300% of the office spaces in the Heathrow are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 3,180 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this area are close to 3 floors. Most buildings in this area were built in 1996 and are Class A.