I have always referred to Washington Grove as "Garrett Park North" which is located below White Flint Mall. Washington Grove is a small community that time forgot resembling a New England small town of the World War II era.
You are corrrect to say the area to the north and east of Washington Grove has changed over the last 20 years but has not effected the desire for Washington Grove as a small community. There has been new construction of mini- mansions around Washington Grove the last 8 years by buliders wanting the Washington Grove sub-division name for marketing purposes.
If you desire the small town appeal there are other area's you can direct your home search.
RE/MAX Realty Group