Franklin County, WA Building Safety: Plumbing Permits (2026)
Key Facts
- Adopted code
- 2021 Uniform Plumbing Code, WA amended
- Base permit fee
- $40.00 per plumbing permit
- Per-fixture fee
- $10.00 per fixture on a trap
- Sewer connection fee
- $30.00 per building sewer
- Unpermitted work penalty
- Permit fee doubled
- Issuing department
- Franklin County Planning and Building Department
Summary
Franklin County adopts the 2021 Uniform Plumbing Code, with Washington's amendments, to govern plumbing work in the unincorporated county. A plumbing permit costs a $40 base fee plus per-fixture charges, and unpermitted work doubles the fee.
The 2021 edition of the Uniform Plumbing Code, published by the International Association of Plumbing and Mechanical Officials, is hereby adopted by reference with the following additions of Appendix chapters of A, B, E and I and deleting T-104.5, Chapters 12 and 14, as if fully set out in this chapter. ... PLUMBING PERMIT FEE TABLE 1.Permit . . $40.00
Full Breakdown
5 and Chapters 12 and 14. 27 amendments. 190's Plumbing Permit Fee Table: a $40 base permit fee, plus per-item charges such as $10 for each fixture on a trap, $30 for each building or trailer-park sewer, $20 for each water heater and vent, and $20 for each backflow-protection device installation, alteration, or repair. Solar panel installations, fire-suppression systems, and medical gas piping also run through this same fee table. Plan review runs 65% of the underlying building permit fee for most occupancy groups. 260: up to $1,000 and 90 days in jail.
Violations & Fines
Installing, altering, or repairing plumbing covered by the adopted Uniform Plumbing Code without the required Franklin County permit doubles the applicable fee under Section 15.12.190, and is a misdemeanor under Section 15.12.260 punishable by a fine of up to $1,000, up to 90 days imprisonment, or both, with each day of continued violation a separate offense.
Frequently Asked Questions
Do I need a permit for plumbing work in unincorporated Franklin County?
How much does a Franklin County plumbing permit cost?
Is a building-sewer connection covered by Franklin County's plumbing code?
Sources & Official References
Other rules in Franklin County
Compare Franklin County to another location·View the Washington building safety overview
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