When under contract at 300k with the expectation that codes would be the determining factor on what can be done on with the property, as it relates to new construction.

They might have insights on specific zip codes or pitfalls to avoid. https://www.biggerpockets.com/forums/521

Use median household income by zip code (and school rankings, to a much lesser extent). 

Also what is the Housing Maintenance Code.

As you begin your REI journey here is one tip I have for you:Use this website as you are trying to narrow down the places you want to invest in. https://www.areavibes.com/Its awesome because it gives you a "total livability score" & you can compare different zip codes & streets to others. 

You would need to bring everything up to code currently and that's going to be cost prohibitive.

🌟 December 2024 Top ROI ZIP, 28262 🌟For the first time ever, only one zip code produced an ROI of 7% or higher!!

I also own over 15 properties in these two zip codes. 

There are codes that allow for more density or at min ADUs on SFH lots now.

Based on the rents, I would guess the $1350 house is in a C+ or maybe B- area, and the $950 is in a C- area.What neighborhoods or zip codes are these in?