Basement Apartment Feasibility

[Winn Cook]

Hello BP community,

I am a Colorado homeowner planning to build a detached accessory dwelling unit (ADU) and renting it out. The city code has a maximum size of 550 sq. ft. for ADUs and I am considering building a basement as well. For the basement to be useful I would need to install below ground plumbing and an electric lift station to pump waste up to the main. Does anyone have any experience with basement plumbing or renting out units below ground? I am curious about the risks of this situation, the involved maintenance, and the lifetime of a "lift station."

Any advice would be greatly appreciated.