Not sure I buy the premise. Austin has a household $133k median income with a $435k median home price. It’s very affordable.

But, to make Austin more affordable still, you make it less expensive to build so that it’s profitable to build. Typical regulations that do this are: - Lower minimum sizing requirements - open zoning - raise height limits - make sure you don’t have unwarranted restricted fire codes (some places have elevator stairwell requirements that are insane) - make permitting easier or not required at all for some cases - no min parking requirements

Pretty sure as good as Austin is, they could easily reduce the costs by up to 30% (there are parts of the country with 50% the cost per sq ft for new construction).

That means there’s an invisible hand keeping prices up, or basically that the market is not free enough. That’s caused most of the time due to excessive regulation.

Another reason is high demand in locations where offer is limited due to physical limitations. There’s always demand to live in Broadway, and offer can never catch up due to its physical limitations.

there are many things you can do, but essentially you want to make it profitable for builders to make houses at a lower price point, or give the average person more money. Some approaches (not all of which I'm endorsing):

- reduce restrictions around planning / construction / etc (because it takes time and expertise to comply, both of which cost money)

- find a way to bring in cheaper labor, or make it possible for construction companies to hire the same labor at a lower price. Maybe a subsidy, maybe reduced taxes, maybe relaxed labor laws

- add a subsidy for homes

- make your citizens more wealthy, so the price is no longer above their means

- outsource construction to a place that can build it more cheaply (eg, prefab homes)

Won't the market fill the gap? For example, in Indonesia, "standard size" houses are mostly out of reach for new buyers (young generations), so they build houses farther away and/or smaller.

Remove parking minimums and work to address inequality? If that the case in Austin though?

Where does this happen, in presence of a reasonably free market?

I can only think of extremely land-limited places like Monaco and Gibraltar. Where the answer is "not everybody should live in Gibraltar".

But the US has a lot of land. So much land that it can afford wasting it on endless sprawl of single family homes, which is the least efficient way of providing housing. Most Asian megacities would not be able to exist if they had as strict zoning principles as the US has.

Maybe you should also think about barriers such as "bans on boarding houses". This is what messes with poor people the most. A room in a house full of rowdy individuals sucks, but it is still a room. Possibly you may spend just a year there, then find something better. A tent in an encampment of rowdy individuals is strictly worse on all accounts except cost, and bouncing back from that is harder.