For, as I said earlier, a house costs in Seattle just what a house costs anywhere. It’s not even the price of land which drives it up in that locality. It’s the permission to put a house on a piece of land which does. Allow more housing on that set amount of land, and the price of each piece of housing will fall. This isn’t rocket science, just basic economics: Increase supply, and prices fall. And again, it’s permits to build which are in short supply, so issue more permits and the price will fall.
My preferred solution is to simply abolish zoning altogether. You own a piece of land? Build as you wish upon it. That would solve one of our modern world problems by having less government. Indeed, simply stop government from doing something (rationing house-building), and the price of housing will fall.
Even if that’s a bit radical for you, it is still true the Seattle City Council is causing the problem. Thus it’s one the Seattle City Council can solve entirely. Allow people to build more dense housing in Seattle, and the price of housing in Seattle will fall. That’s what they say is their goal, anyway, so why don’t they do it then?