Legal Question in Real Estate Law in New Hampshire

I suggest you read the mortgage document. In most cases there is a clause which prevents the owner from transferring any ownership rights without the prior written permission of the bank. In your case, it might be feasible for you to co-sign for an equity line with your son if your credit is strong enough. Another option might be to take out an equity line on your own home and then loan the money to your son while he works through this difficult time.