Most listings are in the $20's per square foot per year. The Lawrence submarket is going through a an increase in rates. In the last 3 months, the median rate went up $21 per sqft per year.
Compared to the rest of the Greater Boston market, the Lawrence submarket has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 41 listings have been made available, so you'll want to check back regularly for new listings. 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 1,380 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this market were built in 1905 and are Class C.