Here is an old advertisement for real estate in Columbia Heights. This was printed on Saturday, November 12th, 1921 in The Washington Times. Using the consumer price index, $6,300 in 1921 equals $78,100 today. Though if you look at this simple online calculator, you’ll see the estimates vary wildly.
Source: Library of Congress
Right down the street from Central High School is where my father was born. (In a house there) He went to that school, after graduating form Holy Comforter right down the street. I have a film of my father walking the old neighborhood telling us all the great things that were there, including the home on the corner that was also a bakery. They even made bread for the White house.