The details: Take Route 9 (Boylston Street) to Hammond Street.  This intersection has a CVS store, and is near the Star Market and the Chestnut Hill Shopping Center.  Be sure not to confuse this with the next large intersection to the west along Route 9, at Hammond Pond Parkway, where the Chestnut Hill Mall is located.
1.  Turn onto Hammond Street going north. 
2.  Take the first right, at the stop sign, onto Middlesex Road.
3.  Take the third right onto Norfolk Road.
4.  Take the first left onto Crafts Road. Continue for half a block to #27, on your right.