1) have a building inspector come out and see if your shower answer is legal, proper, and common. 2) if so, and there’s no other reasonable cure lower their rent for the inconvenience, offer to let them out of the lease?

It all depends on the inspector. 

Arrange home inspector  xxxx dollars  . etc etc . 

@Kayla Palmieri read the contract or have your buyer’s agent explain thoroughly as some inspection contingencies require a licensed home inspector actually inspect it, and some even require approx cost of repairs and if seller agrees to that amount then you cannot exit for inspection contingency.

If it's spotted by an inspector during an inspection or the CL100 (pest inspection), it will be noted in the report.

Did you use a home inspector? 

Currently working on a duplex in Sacramento and these are all things that the inspectors are requesting.

I read somewhere it was a requirement and I went to call and electrician to fix in one of the rooms. but the inspector did not even take notice of the room that did not have a permanent light fixture- so i guess it is not a requirement.

We have a full cleaning team, cleaning inspectors, operations manager, full time maintenance man, and a full time director of owner relations, then us.

Buyer might not notice, but Buyer's home inspector will definitely notice.I bought one of these with a property in 2013.