The need for building permits in the counties is limited to plumbing, HVAC, & electrical. 

Plumbing company says its the only way to resolve the issue I have.

The insurances like AAA are strict on the paint, roof, plumbing, electric etcThe houses are in Stockton, California.Thanks

Labor/material are going to be different and need to factor that in4) new roof, new HVAC, new water heater, ac panel, replacing plumbing to PVCThese are very variable, if you are getting this from a licensed guy to do it and unlicensed.. is it a big shop or a local shop doing it, is the GC doing it they will put some money on the top so it will be more money5) framing (creating new bedrooms or baths)I would get all these quoted from a good couple of licensed guys and unlicensed to know your numbers to cents

It's understandable that unexpected things arise sometimes, especially when you're opening up walls or dealing with older electric or plumbing.

Plumbing is all brand new. 

Let’s break it down with the 70% rule to see if it’s investor-friendly:ARV: $190,000 (taking the middle of $180K-$200K)70% of ARV: $190,000 * 0.7 = $133,000Minus Estimated Repairs:Roof: $20,000AC: $4,000Additional repairs (general estimate for a property needing updates, say flooring, paint, minor plumbing): $10,000-$15,000Total Repairs: approx. $35,000Max Buy Price for Investor: $133,000 - $35,000 - $10,000 (wholesale fee) = $88,000Since you’re getting it for $91,000, you’re close, but to make it irresistible, consider negotiating the purchase price down a bit further.

@Olga K.It doesn’t necessarily confirm the sewer line is completely blocked—it might just be an issue with the internal plumbing or fixtures.

Plumbing is historically one of the most difficult things to fight since age and the structure matter so much and it is nearly impossible to pinpoint one issue that caused the damage. 

Another guy wouldn't pass me at all because I showed him up...yet another kept insisting that his interpretation of a plumbing code was correct when it was not - cost me 1 month of time.A neccessary evil IMO, they were usually former GCs who couldn't make it in the real world.....