This often happens when the assessor office creates a separate lot for tax purposes but the larger lot of which it is part was not legally subdivided.Also, as pointed out above, tax liens, weed abatement charges, HOA, etc all usually survive.  

The company I mentioned above actually found the real issue (more on that in a separate post) and I visited their office yesterday. 

I have an existing LLC for a separate investment property with a partner. 

First, ensuring that each property or group of properties is held in a separate LLC can limit exposure, confining potential liability to the specific entity involved.

But, they are structurally separate and both income-producing.

@Miranda LeMaster If your agent can not offer you a good commercial option, then you are working with a personal lines agent and you may want to think about making a change sooner than later.Ideally you want to have 2 separate insurance programs.  1 for your personal and 1 for you business/commercial exposures.  

We used private money and seller finance for acquisition, raised rents, renovated one building, and sold each building separately as 4 unit buildings.

First thing you need to do is separate the two entities- the house and the park.The house- Get the appraised value of the home which should be easy enough to do. 

The sections of pipe are separated, so I'm thinking it's an open trench job. 

SMLLC is disregarded and does not have a separate filing requirement (gets reported straight on the Form 1040).I can't speak to the implications of a potential divorce, I would consult an attorney.