Ours would be around 50%. At least. Housing is expensive here, and DH had bought this house before we met. For a whole host of reasons, it hasn't made sense to sell, but I've definitely been tempted. We have been very housepoor while we were a 1 income family, now that he has a job, it doesn't seem so dire.
Some of the percentages are phenomenal to me - the idea that you could own a house for less than 20% of net worth - assuming most people are not already multimillionaires - when the cheapest 1 bed apartment I can find in my city on a RE website search is over $200k. Even lots out on the urban fringe, the property report I get said that last week there was one lot sold for under $250k, while dozens sold for $500k +. That's just the lot, the house would be an extra few hundred k on top.
Regardless, until we have a huge property crash, assuming we stay in this city (where our families live, so likely) our house will be a significant percentage. I'd say at FIRE, it will probably still be 30%, or more if value continues to rise.