My brief research

I don't think HOA fees can be separated, but if HOA includes services such as trash removal, parking etc, you can collect fees on those separately.  Also I think water charge could be separated. 

See below. 

https://howtogeton.wordpress.com/legal-ways-to-pay-more-rent-on-section-8-housing-vouchers/

Separate Non-Rent Expenses

Some leases bundle in services that Housing Authorities do not consider rental expenses. For example:

• Pet fees
• Lawn care & snow removal
• Internet
• Parking spaces
• Cable
• Laundry facilities or washer/dryer in apartment
• Use of sheds or outbuildings
• Snow removal

Some of our readers were able to speak with their landlords and request to remove these fees from their rent. The fees were not included in the “rent,” but instead noted in the lease as a separate fee, or attached to the lease in an addendum.

所有跟帖： 

• 檸檬俠動作真快！多謝！我這裏水費是包在HOA裏麵了，不好分開。不過可能可以在 -ice_tea- ♂ (156 bytes) () 02/27/2023 postreply 09:35:10

• 你可以隨便開價，我隻是說直接講房客付HOA fee有點牽強，但是你說water charge $50 / months -檸檬椰子汁- ♂ (111 bytes) () 02/27/2023 postreply 09:42:53

• 哦， 那就沒問題了。非常感謝！ -ice_tea- ♂ (0 bytes) () 02/27/2023 postreply 09:48:47

• 這些得在tenancy approval form 上填，由政府審批來最終決定政府數額，租客數額。 -MrsKwok- ♀ (0 bytes) () 02/27/2023 postreply 10:07:39

• 你說的做法可行也不違背HA規定。我這樣辦過。多收80水費垃圾費。HA提標準後終止。三方都沒問題。 -QinHwang- ♂ (0 bytes) () 02/27/2023 postreply 12:11:03

• 知道了。以後可以用這個方法。這次沒用上。多謝！ -ice_tea- ♂ (0 bytes) () 02/27/2023 postreply 15:39:45