"North" Bloomingdale gentrified in the 2000's, while "south" Bloomingdale is not eligible to gentrify (because it was gentrified in the 1990's)

Note the census tract north of Rhode Island Avenue NW in Bloomingdale is labeled as gentrified.
     
And note that the census tract south of Rhode Island Avenue NW in Bloomingdale is labeled as not eligible to gentrify -- because it was gentrified in the 1990's.
     
Click on the link to read the entire Governing post

Washington, D.C., Gentrification Maps and Data

To assess how gentrification has reshaped urban neighborhoods, Governing analyzed demographic data for the nation’s 50 most populous cities. Changes in several measures, described below, were calculated for each city’s Census tracts and compared to others throughout metro areas. While the methodology is similar to prior research on the subject, no universally accepted definition of gentrification exists.

Gentrification remains rare nationally. It did, however, greatly accelerate in many cities over the past decade. 

...

Not Eligible Tracts: These tracts, typically middle and upper-income neighborhoods, did not meet the initial criteria for gentrification. To be eligible to gentrify, a tract's median household income and median home value both needed to be in the bottom 40th percentile of all tracts within a metro area at the start of a decade. Tracts with less than 500 residents or missing data were also considered not eligible.


This first map is based upon the 2000 census.

This second map is based upon the 1990 census.