US Constitution
Article I, Section 8
The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States;
To borrow Money on the credit of the United States;
To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes;
To establish an uniform Rule of Naturalization, and uniform Laws on the subject of Bankruptcies throughout the United States;
To coin Money, regulate the Value thereof, and of foreign Coin, and fix the Standard of Weights and Measures;
To establish, regulate, maintain and enforce a Standard and Uniform building code;
To provide for the Punishment of counterfeiting the Securities and current Coin of the United States;
To establish Post Offices and post Roads;
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See, it's it there. I got I from my handy dandy AOC Pocket Constitution.
If they Federalize building codes, they can make it virtually impossible to build your own house. Today, if you dont like nanny state / crony regulations, you can go one county over.
Hey! You made that up! (I had to go look it up.)