That will allow you several benefits like adding the square footage to your property, having it appreciate in value as more ADUs are added to the neighborhood, legally rent it out within the city's parameters around long-term, mid-term, and short-term guidelines, and feel good about your investment.

One is fourplex near downtown of Union city new jersey and the other a duplex in jersey city heights neighborhood.

Knowing the three cities mentioned is important for grading the neighborhoods and can vary street by street. 

There are two condos in my neighborhood that are trying to sell, but have been on the market for 100+ days.

However if you buy in a neighborhood where people do care or all  your tenants have cars, you may get shut down quickly. 

Hi All, I've got a nice condo in Mission Dolores neighborhood that ever since the Pandemic we have long-term rented.

First, a lot of people with Section 8 vouchers end up staying in the same neighborhood because it’s where they feel comfortable, where their family is, or just because they know the area.

This isn't so much due to interest rates - these neighborhoods have been this way for at least 4 years.

I think your best approach is to pretend you are the investor yourself, calculate build cost (mortgage with interest) + Maint / cap expenses/ management fees according to your zoning and then compare that to the average rent in that neighborhood.

I paid 20k for the first lot i bought in Charleston in the poorest neighborhood of downtown..