Bottom line... Montgomery County is in the top 10 if not top 5 of the highest taxes in the US.
From that you get a Highly Rated School system, Police Department, and Mass Transit. Roads are not great and we have a 5 cent bag tax at the store. Our housing standards I am told are higher or at least more stringent than Virginia. Therefore, the cost to build in Maryland, specifically Montgomery County is much more expensive than the same model found in Virginia.
Come take a look at my house :) I am walking distance to the Red-line Metro, the Mall, Costco, and approx. 1 mile from an amazing 500acre Park with tons to do. Plus, my Mortgage guy, JUSTIN HILL WITH EMBRACE HOME LOANS will give you 1% BACK FOR CLOSING COST. (That's a $4000plus savings right there)!
11520 Clairmont View Terrace
Silver Spring, MD 20902
Best of Luck!