How do you convey partial ownership of special warranty deed?

You can convey an interest in land by a quitclaim deed. For example, you can convey a twenty five percent interest each to your two sisters in the same deed. For any type of conveyance you should consult with an attorney who specializes in real estate law. She/he could review your needs and draft the deed properly according to your state laws and according to the tenancy you wish to create among the owners.