From the first quarter of the 20th century to about the start of World War II, Montgomery County experienced a phase of country estate development. Mostly located along the main arteries leading into the city, these properties were generally grand in scale, with buildings of historicized design basis, and architect designed. Often, they incorporated existing buildings and landscape features, as is the case here, to create a romantic and bucolic stage set in which to live. Some were developed as weekend retreats, but many, with Friends Advice as an excellent example, were developed as permanent residences. This phase of Montgomery County history represents a significant change in the county's history; from a rural agricultural county bordering the city, to a suburbanized affluent county responding to the rapid growth of Washington in population and importance. Washington was becoming a center of influence and expanding government, and with that came new office workers and wealthy people drawn to power. With its present appearance created in 1939-40, Friends Advice represents the last phase of country estate development in the county. In this phase, architectural precedents generally came from American vernacular origins, particularly rural Pennsylvania and Virginia, though often mixed with high style Georgian and Federal elements and usually with a smaller scale than the earlier phases. Friends Advice is believed to be the last example developed. Significance is also derived from association with General Albert C Wedemeyer (1897-1989), a person significant in American military history. General Wedemeyer is the architect of the plan used by the Allied forces during World War II to defeat the German forces. General Wedemeyer and his wife, whose family owned this property since the 18th century, used Friends Advice as their permanent home throughout his military career and after his retirement in 1951 until his death in 1989. - NRHP, 16 September 1992