Austin’s Surge of New Housing Construction Drove Down Rents

After decades of explosive growth, Austin, Texas, in the 2010s was a victim of its own success. Lured by high-tech jobs and the city’s hip reputation, too many people were competing for too few homes. From 2010 to 2019, rents in Austin increased nearly 93%—more than in any other major American city. And home sale prices increased 82%, more than in any other metro area in Texas.

Its wild how the solution to housing costs is really just:

Build more housing. Keep law and order.

No it doesn’t need to be “affordable”. Yes rent control is a terrible idea.

Just build more housing.

Note: that the US already has plenty of housing and housing costs basically go up in areas of low crime relative to economic opportunity. If you build housing, but allow crime to rise, you have wasted everybody’s time.

This comment is phrased as if the article is confirming these points when it either doesn't mention them or even directly refutes them. First there is no mention of either crime or rent control in the article. But more importantly, it states that "A key piece of Austin’s strategy has been to encourage the construction of affordable housing." So why are you concluding that affordable housing isn't needed?
Affordable housing is the only type of housing that will ever be built. Builders aren't so stupid as to build products that their customers can't buy. Government intervention is not needed.
And yet, gentrification.
God forbid bad parts of town ever get good.
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Can you guess what the #1 source of wealth increase in the AA community has been over the last 20 years? That's right, grandma's house...guess where she lived.

This is a huge important part - if gentrification of an AA community occurs in an area where the homes are owned by the residents, it's a great wealth-growing event; generational even.

If the gentrification of an AA community occurs where the residents rent then they capture none of it and are forced out.

Let's assume communities are rated on a scale of 1 to 10. A "gentrified community" goes from being a 3 to being an 8. Renters are forced to move because they can't afford 8/10-rated-community rents, while existing owners profit handsomely. On this we all agree.

Where do the new residents of this now-8/10 community come from? Probably a place that was less than 8/10 - maybe it was 7. So now there's less demand for all the 7s and their rents decrease, allowing residents living in 6s to move there. And so on.

Assuming housing construction in the region has kept up with the population, even the renters who were forced out of the previously 3/10 community will likely find new housing in a 4/10 neighborhood at the same price. Their relationships from the old place were probably disrupted by the move (bad) but they also got better housing for the same money (good).

The key in this is housing construction must be allowed to increase with population.

Exactly - when things are happening "naturally" for some value of "not artificially constrained" you find that people move over time and what were the luxury dwellings of 20/30/50 years ago are the new "starter homes" of today.

When supply is artificially constrained, the old homes get torn down and replaced with luxurious ones - without increasing dwelling spaces available.