The main issue with Pasadena is the high price of entry and long timelines for Building and safety permits. 

Only if you are replacing or removing is when you run into issues, proper safety, and disposal. 

I see this is an old post, but was hoping you could expand on the hazards of using STR platforms to advertise and book month to month rentals?  

Most of these cases are just large safety issues often resulting in the building be unsecured in the past.  

Safety violations may be a different fine schedule. 

Health and safety policies, resources, on going training are amongst a few.

**Electrical Safety Hazards: Exposed Wiring and Issues with GFCI Outlets** - Exposed wiring in easily accessible areas and GFCI outlets in the kitchen that wouldn't reset pose significant electrical safety hazards.4.

However, the appraiser says that the stairs are of safety concern, and I need to be rebuild to code.

The HUD inspection guidelines are built around safety & health. 

You could consider offering to have the shower inspected by a licensed professional to provide a written report confirming its safety and functionality to address your tenant's concerns.If your tenant continues to refuse to pay rent, you may have grounds to evict them for non-payment of rent.