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See what others miss. Engineering, investing, and building intelligence for real estate investors.

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Artwork for Eyes Open

Latest Issues

The Building Tells You Everything If You Show Up

I walked beneath Grand Central Station once.

You won’t find it on a tour. There’s a layer underneath the iconic hall that runs the building — the steam, the power, the mechanical guts that move a million commuters a day without any of them...

9 days ago
2

The Most Expensive Spreadsheet I Ever Built

In 2010 I had a notebook that I am still embarrassed about.

The notebook had six modular plots in it. Small lots, in a market I understood, at a price I had run six different ways by the time anyone else got to the table. I had soil notes....

11 days ago
1

The 25% Mystery I Couldn't Crack

The water bill jumped twenty-five percent in a single month.

Not on a brand-new property. Not after a renovation. Not during a heat wave that would have made the irrigation pop. On a building that had been operating the same way, with the...

16 days ago
1

How Apple Killed the Glass That Was Supposed to Ship

Glass is probably the least efficient building material on planet earth.

I have said that in a few rooms and watched a few architects flinch. It is still true. Glass has terrible thermal performance. It moves heat in and out of a building...

18 days ago
2

The Inspector's Report Is Now a Legal Document

Years ago I scoped a main plumbing line on a multifamily property I was evaluating. The inspector had already been through. Report came back clean. Numbers worked.

We pushed a camera down the line. Ten feet past the building, there was a c...

23 days ago
3

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  • Jon Weiskopf, PE

    Engineer. Investor. Lender. 20 years, 400+ buildings, 20 countries. 9 years at Apple. Founder of Blue Eyed Capital. I write about what I see that you don't.

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