Today it would be hard to say but location wise maybe C, inventory wise B-D. The D properties get bought up quickly and flipped, this area has the most house flips in the Denver metro House Flip Map
the whole west side of Denver (west of I-25) used to be considered "D" about 30-40 years ago. Starting in Highlands neighborhood (or northside) which used to be a very rough part of town, is now the one of the top 3 most desirable are in the metro and this has slowly trickled down into neighborhoods south.
I am an engineer so I love to base my decisions on data, so for example looking at census data, I like to look at % of high income earners in an area to gauge if I should invest or not
For 80204 which includes the neighborhood of Villa Park, in 2010 the % considered upper middle/high income was 4.2% of households. 2022 census says that now it is 40.5%
On the other end is 80219 which includes the neighborhood Westwood which would have the lowest income area on my list, in 2010 Westwood had 4% as well, by 2022 it had 21.1% high /upper middle income earners.
I have properties in both and tenant applicants are a wide variety (lower income folks on rental assistance to high income earnings wanting to rent in an area before buying a home) so its hard to put a property class in this area.
Property appreciation in these areas have outperformed Denver's for the last 10 years, and is the last area of affordable houses.
The whole area was neglected in the past but is having an insane about of public development that I fail to see how it wouldn't continue (near one river north development, mile high station redevelopment, federal blvd greenway, federal blvd BRT, Morrison Road redevelopment, just to name a few).
sorry for the long post I kinda just spilled out my whole thoughts on the area..