On average, listings lease 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 increased $2 per sqft per year. That's a 10% increase in rent.
Compared to the rest of the Greater Boston market, the Lawrence submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 46 listings have come on the market, so you'll want to check back regularly for new listings. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,510 sqft. Most buildings in this market are close to 2 floors. Most buildings in this area were built in 1905 and are Class C.