1. The real estate license is the legal evidence to prove the ownership of the house, but it is not the only evidence. The parties may agree on the ownership of the house property by signing an agreement. I agree with the way you signed the agreement, but it doesn't have to be notarized, as long as the agreement is the true meaning of the parties and it is not illegal.
2. As for the template problem you mentioned, because it involves specific issues and greater interests, I suggest you consult a lawyer in person and entrust a lawyer to write it for you. Template, can't be universally applicable. In addition, what kind of agreement to sign must also be considered, because we must also consider that the house is demolished after all.