From i-864 instructions:
You may include the net value of your home as an asset. The net value of the home is the appraised value of the home, minus the sum of any and all loans secured by a mortgage, trust deed, or other lien on the home. If you wish to include the net value of your home, then you must include documentation demonstrating that you own it, a recent appraisal by a licensed appraiser, and evidence of the amount of any and all loans secured by a mortgage, trust deed, or other lien on the home. You may not include the net value of an automobile unless you show that you have more than one automobile, and at least one automobile is not included as an asset.