What is the principal business code for a rental property

[AnthonyC]

There are a few different principal business codes related to real estate and rentals.  You can find the full list at the link below on pages 17-18.  I have posted the most likely codes here, but there are others.  Also, these codes are only for statistical purposes, so if you don't find a good match you can use 999999.

Real Estate Property Managers - 531310

Other Activities Related to Real Estate - 531390 

Lessors of Real Estate (including mini-warehouses and self storage units) - 531100

https://www.irs.gov/pub/irs-pdf/i1040sc.pdf