King County (county seat: Guthrie) covers 911 square miles with a population of 265 (2020). Official county website: www.co.king.tx.us/. This page summarizes the verified building-regulation posture of unincorporated King County land; the full 10-dimension scorecard with every source receipt lives on its Freedom Map card.
No county residential building code or building department found; Texas grants no general county code authority and no ch. 233 Subchapter F adoption is evident. King County has NO incorporated municipality — Guthrie (the seat) is unincorporated — so there is no municipal code jurisdiction either. The entire county is unincorporated; building freedom is near-maximal, constrained only by OSSF and any floodplain rules.
The claim above is source-verified (official statute/county documents; URL, direct quote, and date on the full card). Method: how we verify.
No county's freedom erases state law: septic/wastewater permitting (health authority), well permits and water rights (state engineer/DNR), floodplain rules with federally connected financing, and — in some states — state-run electrical inspections. The full card details which of these bite in King County and how hard.
Building rules are the first question people ask about King County — and the easiest one to answer. They're rarely the one that decides it. The full card grades all ten dimensions, every claim quoted from the county's own code.
What the King County card answers that this page doesn't:
It's a real map. Click any county in the country and see how it grades — that part costs nothing, and you can compare King County against its neighbors before you spend a dollar.
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Last verified July 2026 · Not legal advice — confirm current rules with the county, the state, and a professional before buying or building.