Quote from @Brad Sand: I have rentals in Tarrant County and you can file a protest directly online yourself at tad.org  My Property Mgr refers a tax protest service, but I opt out, since it is pretty easy to do yourself and I am an Appraiser and don't see the need to pay 25-40% for the service.

Anyone know about grant money for soil clean up operations available to for profit entities?

One thing I wanted to mention that my inspector said who's been around the block in this city and knows his S*** (Picture Crocodile Dundee type knowledge and application) , is that these 4-plexes in this NE part of town were mostly built on expansive soil, or something with the soil, which makes them considerably more prone to movement and foundation issues over time..  

You just have to know how to get that seed, maybe with another partner, and also know how that Tree is going to grow.Even where I bought in Windsor Terrace, Clinton Hill, Bed-Stuy and Ditmas Park wasn't the best "Soil" to grow my tree.

In the past we have also turned the soil and planted sod if the grass is to far gone. 

As an aside most older homes here in Chatt have some type of settling because of lack of soil compaction when building and the fact we get 50+" of rain a year. 

@Sandi Ghobrial - duplexes are listed on MLS just like single family properties. 

The reason for this is most associated with poor grade or pitch which caused  excessive soil /water pressure against the wall resulting in incremental displacement as wall yields to horizontal earth pressure.

Quote from @Christopher Sandys: Here's one cautionary note I will say about Toledo. 

If its on a crawl space it could be an easy fix, also I dont know what kind of soil you have in San Diego.