No, this sounds nothing like suicide.

The house is both a representation of your physical/emotional being, as well as your current life situation. t's decrepit, and the prime factor for this is the antagonist of Myra/Mother/Jackie. It's almost as if you're searching yourself for some hidden understanding. But the antagonist/s is keeping you from being able to get to the bottom of things. Speaking of, did the chamber go up or down or just deeper within? If it's up it represents into your mind/spirit. If it's down, it's literally "to the cottom of things", or to the root cause of where you are. If it's to the center of the house, it's to the core of your being...closer to your "true and complete" self.

Laura is the part of yourself that you relate to her positive traits. Think of her as your guide, giving you access to the good things you see in her and in yourself. Realize that the good things you see in her, regardless of is you see them in you, ARE in you as well. Projection, which we often read as relating to negatives, works just as much on positives. Realize your strengths and go with them.

Inside this chamber, you find a button that opens a glowing white pedestal. You want to lift yourself up...put yourself on this pedestal. You want the peace. The hosue pet (which is the primitive and cross gender part of you, by the way) dies...but it dies as the pedestal is being lowered back down. This doesn't mean that going on the pedestal is going to kill you, it means allowing the pedestal to remain hidden will. It sounds to me more like your subconscious is calling you toward self-empowerment.

A final note here :: All characters are you, so the antagonist is also you. This needs to be addressed...

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Questions to consider...

-What traits do you see in Myra that you also see in yourself? Are they negative or positive?
-What traits in Myra are striking to you, regardless of if you see them in yourself?

-Apply these first questions to your Mother and to Jackie as well.

-In what ways do you portray the negative traits in the antagonists?
-In what ways can you make an effort to avoiding doing so in the future?

-What strengths, self-perceived or not, do you see in Laura?
-How can you portray these strengths in yourself?
-In what ways have you already shown these strengths?

-What is it that you seek within yourself?
-How do your mother, Myra, and Jackie prevent you from achieving this discovery?

~~Realize that this is a self-discovery, so any obstacles others put before you are all in your head. This is nothing physical at all, else it would not be so hard wired into the dream.~~

-In what ways can you take pride in your strengths and show yourself as the person you want to be?