Need advice on grading/concrete pad issue

[CK Hwang]

Hi everyone, I'm currently in the middle of a flip project and need some advice. The house i am currently working on has a concrete pad in the backyard that extends from the house.

This concrete pad was built up during the 90s and now sits at the same level as the inside of the house. According to several contractors, this is not up to code and the pad needs to be at least 2 inches below the interior of the house to prevent moisture/rain intrusion.

As such, I feel like I am faced with 3 options

1. Do nothing and keep the project within budget

2. Install a perimeter drain between the house and the concrete pad and stay within budget. This should prevent moisture intrusion but is not necessarily up to code.

3. demo the pad and install new one and run over budget by a few thousand dollars.

Anyone has any thoughts? ie not being up to code is not a big deal, or perhaps just give buyer a certain credit at closing to rectify if they wish etc? Your advice is appreciated. Thanks in advance.