There is no way to know but to inspect the property: there is no agency, etc. which will do this for you. If you believe that your stepfather is not maintaining it and so violating his obligations, you can bring a lawsuit against him to force him to both allow you to inspect the property and to keep it up. This type of lawsuit, which would be filed "chancery" court (a part or division of country court which handles cases involving things other than straightforward lawsuits for monetary compensation), is considerably more complicated than filing, say, a small claims case; you are advised to retain an attorney to help you.