I should be able to help you identify what to look for, and how building an ADU really improves the numbers on a property.

I'm wondering what improvements would you guys consider the most important and which improvements increase the house value the most in percentage terms?

What is more important is what you can do with the property by making small improvements and increasing the rent.Below is an example of the potential profits for a 10-unit property.

So I ripped out the pad, installed new rebar properly, poured concrete and  built 2 more bedrooms/large family room/full bath and laundry room. 1209 SF area improvement

That's improves your overall cash flow by paying less for your own housing.

You partner with someone when they bring something to the table that will make your business improve exponentially.

I would possibly have made a better decision on what improvements to make if I had sought their help during the rehab process.

Here's what I've got: Purchase price: 85K, down payment: 16K (don't want to buy the property outright at this time), income: 1000, total expenses: $680, cash flow: $320, CoC ROI: 20.12%, NOI: 8,148The house doesn't need any major improvements at the moment, and I was considering once the tenants leases are up in 2022 then I might consider making some improvements.

I don't want to say you need to provide your tenants with clean units because many tenants are pigs.If you can't get your rents increase to at least $700 per unit then even though you paid a very low price for the property I still think you purchase a dog because the problem with low rents is when you need to do improvements you don't have enough money coming in.Example.

There's been a lot of commercial development (new chain restaurants and strip mall improvements), but it still has some rough blocks.