Shouldn't the building keep its same weight? [duplicate]

Shouldn't the building keep its same weight? [duplicate] - Full length of happy Asian couple in same t shirts hugging and looking at each other while walking on street near entrance of colorful building

In the trailer for Ant-Man and the Wasp, Hank Pym shrinks a multi-story building to just a few cubic feet. He then wheels it away like luggage. You can see it at the 30 second mark:

The "shrinking" technology works by removing the empty space within and between atoms. So shouldn't the building still weigh many many tons? Is there an in-universe explanation as to how Hank can take it with him?

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Does weight always stay the same?

It's possible to get thinner without actually seeing a change in your weight. This happens when you lose body fat while gaining muscle. Your weight may stay the same, even as you lose inches, a sign that you're moving in the right direction.

Can you cut and stay the same weight?

Strength training builds muscle. To reduce body fat and stay at the same weight, you would need to build muscle at the same time as you lose fat, which isn't possible for most people.

What does it mean when your weight stays the same?

So as you lose weight, your metabolism declines, causing you to burn fewer calories than you did at your heavier weight. Your slower metabolism will slow your weight loss, even if you eat the same number of calories that helped you lose weight. When the calories you burn equal the calories you eat, you reach a plateau.

Do you always gain weight in the same places?

According to our experts, the reason you gain weight so rapidly in your midsection and not in, say, your calves and forearms is because the adipocytes (or fat cells), which are found throughout the body, are more plentiful in the hips, butt, stomach, and thigh area for women and stomach for men.

Shouldn't Be

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Trần Long, Trần Long, filippofaccendini, Trần Long