From the traffic circle near Cony High School:

Turn onto Stone Street (Rt 9) towards the AMHI complex. You will go by Middle St, then Cross St, and then East Chestnut St, all on your right. Caldwell Road is your next right.

From Chelsea:

Follow Stone St (Rt 9) into Augusta. Once you pass the AMHI complex, go straight through the light at the intersection of Eastern Ave. Next you will see Cedar St and then Cedar Ct, both on your left. The next street on the left is Caldwell Road.

Here's a Map.