I just got this news in an email from the Manger of USGBC Education Partners, Sabrina Morelli - Fantastic news for the residential greenbuilding industry!
Email screenshot below
Well turns out the LEED AP Homes is not retiring and will be updated with the other v4 exams. The LEED AP Homes as well as the Green Rater certificate are good options for residential focus.
Sorry for any confusion. Let me know if you need anything else.
Sabrina Morelli, LEED Green Associate
Manager, USGBC Education Partners
U.S. Green Building Council