[giantg2]

"Nice straw man!"

Not strawmanning, some people actually belive this. In some limited scenarios or with a limited differences, it can work. Providing there are controls in place to correct any runaway effects.

" and have predominately bought by rich people."

I wouldn't say predominantly. There were times in the recent past when middle class people were the primary builders/buyers of new homes.

"It's the overall quantity of new housing being build that's important."

I understand filtering, but it does have limits. If you have too many rich people building houses that they don't need to sell, or want to keep as investments or vacations homes, them you can end up with problems. Likewise, if the percentage of rich people goes down significantly, many of the larger homes may not be economical for middle class people to live in depending on things like tax or utility costs.

"And I do agree that the US is not building enough for various reasons."

It's not just that they aren't building enough. Population distribution and vacancies are huge problems. Who or what type of entities owns properties, especially in higher percentages in a given area is a problem. But even when they do build, there is still a problem of the new single family housing being almost exclusively larger. There are very few affordable units in most markets for starter or empty nester homes.

[eru]

> Not strawmanning, some people actually belive this. In some limited scenarios or with a limited differences, it can work. Providing there are controls in place to correct any runaway effects.

Maybe, but they don't call it 'trickle down' economics. That's only ever used as a slur.

> I understand filtering, but it does have limits. If you have too many rich people building houses that they don't need to sell, or want to keep as investments or vacations homes, them you can end up with problems.

Land value tax would be your friend here. Though I don't see the problems: as long as they are building enough, that's great. If rich people want to have a few extra houses, that's fine. Just keep building more, as long as they want to pay for it.

Houses are (or should be) a manufactured product. We can make more of them.

> Likewise, if the percentage of rich people goes down significantly, many of the larger homes may not be economical for middle class people to live in depending on things like tax or utility costs.

Most taxes on houses should drop, if their value drops. Eg that's the case for property taxes.

Utilities don't drop automatically, yes. But you can eg not run the heated pool, or you can retrofit insulation etc.

In any case, capital costs are often the major source of housing costs. Ie that's either what you (or your landlord) pay for the mortgage, or otherwise the opportunity cost of the equity you have in your house.

But those costs can drop a lot just by virtue of the market value of the house dropping. If necessary, they can drop all the way to zero, if the price of the house drops to zero.

So there's an enormous buffer before utility costs by themselves become a limiting factor.

You can also subdivide homes.

> It's not just that they aren't building enough.

No, that is exactly the problem. Another related problem is that it is hard to get approval for anything but a single family home in large parts of the US. So density is illegal.

Vacancies aren't much of a problem.

I don't know what you mean by 'affordable units'? I mentioned already that quantity of units on the market is what matters. If you add a new unit at the top of the market, filtering will make sure that we get another affordable unit at the bottom automatically. Building explicitly shitty (sorry, affordable) housing for poor is a bad move. Requiring developers to do so by law is worse.

Have a look at https://kevinerdmann.substack.com/p/the-housing-shortage-is-... and the other work by Kevin Erdmann.

I do agree that a land value tax would be an excellent way to raise revenue (without impacting the economy), and then those pesky rich people, and especially rich foreigners, bidding up home prices would just be straight up tax revenue, instead of an ideological war.

[giantg2]

"If rich people want to have a few extra houses, that's fine. Just keep building more, as long as they want to pay for it."

Not really. You can't have them taking up land and services for houses rather sit empty. If they aren't used, they aren't helping to alleviate the constraints. Just like all the vacant rental units.

"Most taxes on houses should drop, if their value drops. Eg that's the case for property taxes."

Yes and no. The municipality and schools have costs they need to cover. They can only drop so much, especially when we're talking about the top 10-20% houses.

"Utilities don't drop automatically, yes. But you can eg not run the heated pool, or you can retrofit insulation etc."

The retrofits are major capital expenses that my mention later on. They get more expensive the bigger the house is. You still have larger costs on things like a new roof or flooring since there's simply more of it. Yes, they themselves generally wouldn't become a limiting cost. But neither would the property cost nothing.

There are multiple problems - corporate owned vacancy, building sizes, and even distribution are factors. The root problem is not lack of building new homes, as you claim. It is a distribution and utilization problem at its core. About 10% of the housing stock in the nation is vacant. If you more evenly distributed population and didn't hold units off the market, you'd fix the issue. It would be better for the nation to increase investment (jobs and infrastructure) in moderate or smaller sized cities in depressed areas with higher vacancies. Otherwise you end up with a vicious cycle consolidating people in a dozen or so major cities with people paying exorbitant amounts of money. One often overlooked aspect is that people have preferences towards single family homes. Simply allowing more density isn't going to fix that preference.

[eru]

Agglomeration effects are real. And you are better off building space for people in highly productive cities like NYC and San Francisco, then to force them to toil in obscurity in Appalachia.

They wouldn't be paying exorbitant amounts of money to stay in NYC or SF. They haven't in the past, before America stopped building. The distribution of rents used to be fairly 'flat', without the crazy spikes in productive cities we see today. See eg https://kevinerdmann.substack.com/p/the-consumption-basket-w...

Yes, many people have a preference for single family homes. If the people who are ok with density were legally allowed to enjoy that density, then there would be more space (even relatively close to city centres), left over for the people who prefer single family homes on large plots.

That also applies for your concerns about rich people taking up land: legalise density and building taller.

> The retrofits are major capital expenses that my mention later on. They get more expensive the bigger the house is. You still have larger costs on things like a new roof or flooring since there's simply more of it. Yes, they themselves generally wouldn't become a limiting cost. But neither would the property cost nothing.

Maybe, but you'd expect homes meant for rich people to have nicer than average roofs and flooring already. So your concern is a bit weird.

The vacancy rate doesn't seem particularly outside of historic norms: https://tradingeconomics.com/united-states/rental-vacancy-ra... So I'm not quite sure what you are on about?

In any case, even with your much higher estimate of 10% it's not a big deal. Even if you magically went from 10% to 0% vacancies overnight, you'd still only increased the effective housing supply by about 11%. The shortfall in building is much larger than that.

Again, please have a look at https://kevinerdmann.substack.com/p/the-housing-shortage-is-... and perhaps https://kevinerdmann.substack.com/p/random-notes or https://www.amazon.com/Shut-Out-Shortage-Recession-Universit... for a book length treatment.