What is my best remedy to legally take our house?

You will have to file a probate proceeding in the Superior Court. I assume your mother wasn't married at the time of her death? If not, then the court would award all of your mother's assets to her children in equal shares. You can then record the court's judgment, which transfers ownership to you and your siblings (if any). You might be able to file the probate case yourself with the help of a book and/or paralegal. It would be best to first meet with a probate specialist attorney and learn as much as you can even if you don't hire him/her. Most lawyers will provide free initial consultations. But even if you have to pay for a half hour of advice, it will be well worth it.