^ This.

I'm unfamiliar with the Real Estate Laws specifics for your state, but one thing is pretty uniform at least w/in the Lower 48: If your name is also on the deed & title to your home, it cannot be contracted in sale without your signature. In fact, if he tried to list it, you could probably get an injunction and have the listing cancelled.

Honestly it sounds like your father has a bug up his backside bigtime. Not uncommon, unfortunately, when a parent is frustrated and trying to exert control over an adult child's decisions and life & behaviours. Arrgh, I feel for you, dear one. :/ That said, I have a couple of thoughts, having been on both ends of this child vs parent seesaw:

1. Every time, -in my experience at least, and historically-, that a parent of an adult child makes a sweeping threat (ultimatum, demand, or whatever label fits) that is this drastic and dramatic and terribly life-altering for the adult offspring, there is a specific set of responses &/or behaviours they are trying to acheive from said offspring. What result is your dad attempting to get from this ultimatum? There are at least three possibilitites that occur to me off the top of my head, & you've no doubt thought of a bunch more, since you know your father best.

2. One mistake my late parents (R.I.P.) and I made over the course of many years was a struggle for control of outcomes -- some very overt, and a whole shyt-tonne of passive aggressive push-me-pull-you battles. It covered the gamut: From the way I dressed, spoke, looked, & with whom I associated; to where I went to school, whom I dated, married (and divorced, which they did not believe in) ; and some very very hurtful episodes for all of us re my children & other family relationships. IMO your father is lashing out from some very deep fears. I may of course be very wrong, & pls forgive me if I am. :| Looking back, I can see a lot of underlying peprsonal difficulties that we were all of us totally oblivious to at the time -- and tbh we were too wrapped up in the conflicting issues to see anything but our own familial fears & pyrotechnics.

3. Like you, my daddy and I were very close when I was a child. Okay, let's face it: I was a main-lining Daddy's Girl, lol. Later in my life we had all these conflicts and it hurt both of us -- like yours, many of them stemmed from his concern re my personal & financial stability & monetary security. He was always very srsly concerned that any men & other relationships were looking to take advantage of me money-wise. (Tbh he was right in a few cases.)

4. He never said it in so many words, however, Mother did: He was afraid that I would never get on my feet monetarily after a scary marriage and hideous divorce: bluntly put, Daddy feared that he & Mother would be bailing me out forever, w/no end in sight, and they were older people when I was born, so they were legitimately concerned for their own futures as well as mine & the grandkids'. What I'm asking is, it sounds as tho there is some of this concern or even panic, in your father's asessment of things. Is it possible?

Sorry so long. I too have had to battle getting over-involved & over controlling w/my own kids & also siblings. It's tough to know what to do. Somedays I wanna give up and go hide

best to you, hon.
xo Chyia