They want to make sure it follows building codes (such as fire code, electrical code, and plumbing code) and that your plans comply with zoning ordinances. 

Renters paid own gas, electric, trash.  

No permanent water, electricity, sewer.Water- replaceable 5 gallon tanks as part of the rental. 

Instead, have the PM include a requirement to the Rental Agreement that Tenant must maintain water and electric to the system 24/7; must report damaged heads or leaks immediately; and is responsible to restore the yard to current condition upon move out.

The new windows, roof, and AC help make sure that the tenants electric bills will be reasonable and make them more apt to want to stay long term.  

Complete new electrical, plumbing, hvac required.

Or worse an outdated electrical panel that causes a house fire?

The roof needs to be replaced with rafter repairs, need new electrical panel and rewire, a wall needs to be removed, needs a new kitchen and bathroom. 

There are just too many items which can be overlooked by someone without construction experience such as: structural issues, improper electric, faulty roofing and so on.Having said that, many contractors are not crazy about doing this, as bidding a project takes quite a bit of time and, let’s face it, investors look at quite a few properties before they find a good fit.  

How many times have you figured out what good electrical looks like and what bad electrical looks like?