For newly constructed, purchased or renovated properties and also retroactive generally over the last 10 years, building components are properly classified into individual units of property and accurate recovery periods for computing depreciation deductions.

@Ben Gammon you may want to put this under Classifieds forum as it's personal promotion and the moderators will remove it.

Ketchup being classified a serving of vegetable?

The highest leverage in the world is selling something (houses) you don't own - it don't get no (sic) better than this!

A duplex with an ADU is not and cannot be classified as a triplex due to zoning restrictions.

Another quick update on Colorado's push to classify STRs as commercial property for tax purposes. 

On that note, how do you go about classifying properties as A, B, C, or D?  

Check internet classifieds for rental rates in the area you are interested in investing in.One trick I like to do is to call several Property Manager's in the city/area and tell them that you are being transferred to their city and want to know what areas are the best to rent.Using online resources, it is not difficult to find good Property Managers either.

For Washington DC and Metro area the upper brackets (I would classify roughly 800K plus) are feeling the change.

@Ethan Nicholas DavisYou can access the Classifieds page by clicking the Build Your Team tab on this page and go to Classifieds.