It sounds like you have claims against either the borough or the record owner of the house, or possibly both. You will want to be certain who, exactly, owned it at the time the fire occurred, as well as who had care, custody and control of the property. Be advised, suing a municipality is different than suing a person or corporation. For starters, what the officer told you was correct: to sue a municipality in Pennsylvania, you have to send a "letter of intent" within six months of the event or cause of action. Consult a local attorney who is familiar with municipal law.