We don't like coal today, but it certainly transformed Victorian-era architecture:

“It is the biggest transition in the history of our species, with the possible exception of starting to use fire at all in the first place,” says Barnabas Calder, author of the groundbreaking study “Architecture: From Prehistory to Climate Emergency.” Fireplaces had to be redesigned for coal, smaller, and more efficient, and could now be distributed throughout the house, warming a sequence of smaller rooms that contained heat more efficiently. Brick, which also requires substantial amounts of energy to produce, became affordable. And glass, too, was accessible to ordinary people. “Coal affects the way you can achieve comfort conditions in a building, and it is a very affordable way of producing a significant amount of warmth, which allows for bigger windows. Even more significant is that it opens up a series of new building materials.”

But as new technologies transformed how we thought about it architecture, they also transformed how we thought about climate. Buildings used to have to be carefully "tuned" to their local environment. You had to think about where the sun was coming in, how you were going to trap it during the winter months, and how you were going to release it during the summer months, among many other things.

Eventually though, this stopped mattering.

We had building systems that could take care of these matters, which then meant that we were free to aspire to build the exact same architecture in Phoenix as in London. But we now know that that this doesn't make much sense. And this recent architectural tour from the Washington Post, which starts in 16th century England, is a good reminder that the lessons learned many centuries ago are in fact still relevant today.

Maybe even more so.

The Washington Post just published this interactive feature showing new developed land (i.e. urban sprawl) across the US between 2001 and 2019.

It is based on these land cover maps which were published by the US Geological Survey earlier in the summer. Their findings show that between 2001 and 2019, more than 10% of the land cover in the lower 48 states changed during this time period. Mostly in forested areas.

The WP feature allows you to search by city/address and I would encourage all of you to try it out. As an example, here is Salt Lake City. The gray areas represent land that was already developed in 2001. The purple areas represent land that was developed sometime between 2001 and 2019.

Images: Washington Post

Aaron Terrazas, who is a Senior Economist at Zillow, recently gave this presentation about the US and Virginia Beach housing markets. (I discovered it through City Observatory.)

There are a bunch of interesting graphs/stats in the presentation. Home values in Virginia Beach, for example, have yet to fully recover from the 2007-2008 financial crisis. They are still 8% below their pre-crisis peak, which was in July 2007. (I presume the presentation is dealing in nominal dollars.)

I’ll give two more examples. 

Below is a chart comparing average home prices for rural (dark blue/purple), suburban (blue), and urban (green) homes. In the late 90′s, suburban and urban homes were roughly equal in terms of average prices. But since then, urban homes have shown greater appreciation. The spread also appears to be widening.

And here is a graph showing the share of mortgage borrowers in a negative equity position. That is, the value of the home is less than the outstanding balance of the mortgage.

Now this is only covers people who have a mortgage. According to this Washington Post article, about 34% of all US homeowners don’t have one. Either they have paid it off or they never had one.

Still, the above numbers stood out to me. They speak to the severity of the financial crisis. At the end of 2011 and the beginning of 2012, over 30% of borrowers were in a negativity equity position. And in Virginia Beach it was more than 1/3 of all borrowers at the peak.

For the full presentation, click here.