Legal Question in Family Law in Washington

Re: 17 year old wants to move out

As a practical matter, just move out. There is very little your mother can really do. The law of emancipation is found at http://www.leg.wa.gov/RCW/index.cfm?fuseaction=chapterdigest&chapter=13.64.

However, how are you going to live? Can you support yourself or would you be asking your mother to continue supporting you?

I'd try to sell the idea to her as a cost-saving matter. The new husband and she would each have a legal obligation to support you if you were living in the home. Check out the child support worksheets at the Supreme Court website and find out how much the support would be (in a diivorce situation). That would give you a figure to begin negotiating with. Also, it would give them an opportunity to let their relationship settle in without you there.

These are just some ideas.