How do I go about this?
Personal Injury Lawyer
If you have a mortgage, you'll need to contact the mortgage company and likely refinance. However, it is not as easy as simply adding on a name and there are ramifications. I highly suggest that you consult with a real estate or estate planning attorney.
This answer is provided for informational purposes only. Actual legal advice can only be provided in an office consultation by an attorney licensed in your jurisdiction, with experience in the area of law in which your concern lies.