Hi and welcome to JA. Ray here to help you today.
Let's go through these.
1) My mom recently transferred the ownership of a California real estate house to me and my sister so me and my sister are listed as Joint Tenants on the Grant Deed. I would like to know if I need to take any actions (e.g, signing any legal documents to claim co-ownership after getting the Grant Deed). At this time, I have not signed anything and all I have is the Grant Deed with certifying stamp from the county records office. Please let me know what I need to do.
There is an affidavit you file when the other person deceases.I will get that for you.
2) I have ample saving but I am not married yet. Nowadays divorce are common. I am afraid my future husband will change and if divorce is necessary, I do not want him to get any part of the real estate house and any of my saving. Is it legal to have a prenuptial agreement saying that in the event of divorce, he will not be entitled to any of the house or any of my saving earned before marriage?
Yes it is legal to have a prenup claiming this as your separate property.It is a good idea here since it is separate and premarital to have such a written agreement.
3) If the future marriage turns nasty and if I will be handicapped (e.g, in coma) and can not talk, can the husband ask the court to grant him my house and my saving under any circumstances? If so, before I marry him, is there any way I can prevent him from doing so?
Keep their names off you accounts, have a valid will and POA for another person tot menage your affairs.
4) If the future marriage turns nasty and if I will be handicapped (e.g, in coma) and can not talk, can the husband ask the court to use my house and my saving earned before marriage to pay for medical expenses? If so, is there any way I can prevent him from doing so?
No not if you have premarital agreement here and name someone else in a POA to manage your affairs.
4) What if I die, can the husband or registered domestic partner get any portion of the real estate house or any of my saving?
No not if they aren't on the accounts and you have a valid will here.
5) If I decide not to get married but instead register the guy as domestic partner, are there any laws in United States that allow the registered domestic partner to get any portion of the real estate house or any of my saving if he lives with me for a period of time (e.g, 2 years)?
No again if you keep it separate and his name off the accounts and out of the will.Premarital agreement is a good idea too.
6) In the event of divorce, if I make more money than him and am asked by court to pay for alimony, will my real estate house and my saving earned before the marriage be used in the alimony evaluation process or be used in paying alimony?
Court does look at both parties income and resources in setting spousal support,premarital agreement the parties can agree no spousal support.
7) If the future husband is sued for whatever reason by others (e.g, car accident), will my real estate house and saving earned before marriage be affected (e.g, I am not legally obligated to use my house and saving earned to pay for legal fees or any damage fees in the lawsuit)?
No if it is a separate debt and his name on judgment.You aren't legally obligated for his judgments.But if you are named it liens your properties here too.
8) Is it possible to convert the entire residential house to business use purpose? Is it possible to use first floor as business and second floor as residential? Is it possible to build a studio on the lawn and rent it out?
It is but you need to check zoning for the area you may need zoning change if this is zoned residential.
I appreciate the chance to help you tonight.Thanks again.