They are very close, but you have to compare taxes ( close ) , maintenance fees ( close ) and the individual townhouse itself, how long is it on the market, what is the seller's motivation? The ages may vary, slighlty too. While there are more townhouses and variteies to pick from in Bridgewater, at the moment I see a $10,000 difference ( Branchburg being less) if trying to compare apples to apples. But how does that effect your commute, time and gas wise. If you are open to both look at both. Are looking for a diamond in the rough or willing to spend more for recent upgrades? Some issues and quesitons to ask yourself, but both towns are worth looking and comparing.