The entire line is beneath a concrete sidewalk unfortunately so I'm thinking digging and replacing would be too expensive.Anyone have any suggestions or company recommendations?  

This included things like installing transition pieces in the doorway between laminate and wood flooring "because the change in surface texture was a tripping hazard", replacing a concrete slab in the drive (Which the tenants do not use) because there were cracks, scraping and repainting minor cracked/peeling paint in the halls "because it was a health hazard", installing GFI outlets which the other landlord had never been cited for, and a number of other things that clearly had not just developed since the previous inspection.

If everyone on BP commented on this post you would still probably end up without a concrete answer since everyone’s experience and opinions are different.

Construction codes for duplexs frequently require a firewall between the units and sometimes it's poured concrete - - not fun to remove.

I would say it needs to be gutted, but maybe just plumbing and walls is enough to get someone in there to polish it up.

No concrete pads.

Will position us with more legitimacy & polish for external convos.LEADGEN: We need more leads!

Unless someone else here has some concrete guidance for you and knows your local area I would imagine that this situation varies from county to city to state code department.

I need concrete steps and sidewalks replaced on a SF property. 

I am just cutting the carpet, throwing up drywall, digging the egress window and breaking up that small concrete section outside.