[Spooky23]

The real issue is plumbing. You need more plumbing in residential real estate.

Many buildings are difficult to retrofit because they use a type of compressed concrete floor that cannot be safely drilled. Cheaper to demo.

[drdec]

Right, you demo the existing building and rebuild one that will satisfy the window per bedroom requirement efficiently. I'm sure people reading HN can imagine a multitude of solutions.

We just need to reach the tipping point where the demo/rebuild cost is lower than the expected gain.

[Spooky23]

Real estate is all about tax schemes. If the market goes as predicted, Congress will update the rules and there will be a demolition rush.

[photonbeam]

Can they run the plumbing on the outside of the building?