Texas, King County Plumbing Permit Regulations and County Ordinances for Unincorporated Areas
King County, Texas Plumbing Permit Requirements
In unincorporated areas of King County, Texas, there is no general countywide building permit requirement. However, specific permits are necessary for certain types of development. These include floodplain permits for any construction within mapped Special Flood Hazard Areas and On-site Sewage Facility (OSSF) permits for the construction, alteration, repair, extension, or operation of an on-site sewage facility, unless an exemption applies. For floodplain development, you should contact the King County Judge/Floodplain Administrator. For OSSF work, a site evaluation by a licensed professional is required, followed by submitting an application to the TCEQ Region 2.
Plumbing work in Texas is governed by the Texas State Board of Plumbing Examiners (TSBPE) and must adhere to the state-adopted plumbing code, which is based on the Uniform Plumbing Code (UPC) with Texas-specific modifications. While incorporated municipalities typically have their own building departments for permit enforcement, unincorporated areas may have limited inspection infrastructure. In such cases, property owners are responsible for engaging licensed inspectors directly.
Generally, permits are required for most new plumbing installations, alterations, and repairs. Licensed contractors are typically required to obtain these permits for trade-specific work like plumbing. Homeowners may be exempt from licensing requirements to perform work on their own single-family residence, provided they do the work themselves and do not sell the property within 12 months of completion.
Plumbing installations in unincorporated areas where no specific plumbing code has been adopted must still comply with a plumbing code adopted by the state or a political subdivision.