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Chelan County, WA Building Safety: Plumbing Permits (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Governing code: Uniform Plumbing Code, Chelan County Code Ch. 3.04
Residential stand-alone fee: $117.00 through 7/31/26, rising to $156.00 by FY2028
Residential with building permit: 10% of the building permit fee
Commercial stand-alone fee: $233.00 rising to $312.00 by FY2028
Building sewer definition: Starts 2 feet outside the foundation wall

Summary

Chelan County requires a plumbing permit under the Uniform Plumbing Code, adopted county-wide through Chapter 3.04, before altering a building sewer or plumbing connection in the unincorporated county. A stand-alone residential plumbing permit costs $117.00 through July 2026, rising to $139.00 in FY2027 and $156.00 in FY2028; a permit tied to a building permit costs 10% of the building permit fee.

These county ordinances apply to unincorporated areas of Chelan County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

The county adopts Part II Building Sewers Sections 713 to 723, Tables 7-7 and 7-8. ... Fee Description Fee (FY 2026) Fee (FY 2027) Fee (FY 2028) ... ~Plumbing Permit ... * Residential (Stand-alone) $117.00 $139.00 $156.00

View official code

Full Breakdown

105 amends the Uniform Plumbing Code's 'building sewer' definition to mean the portion of the line beginning two feet outside the outer foundation wall of the structure and running to the sanitary sewer main or on-site septic system, the segment the property owner must maintain. 110 adopts UPC Part II Building Sewers, Sections 713 through 723 and Tables 7-7 and 7-8, governing sewer pipe sizing and materials. 00 over the same three fee years. 060.

Violations & Fines

Installing or altering a building sewer or other plumbed connection without the required Uniform Plumbing Code permit is a misdemeanor under Section 3.04.020: each day of unpermitted plumbing work is a separate offense, fined up to $500.00, jailed up to 90 days, or both, and Community Development can charge double the plumbing permit fee once the work is discovered.

Frequently Asked Questions

How much does a plumbing permit cost in Chelan County?

A stand-alone residential plumbing permit is $117.00 through July 31, 2026, then $139.00 through July 31, 2027, and $156.00 after that, per Section 3.24.010(b). A residential plumbing permit filed together with a building permit instead costs 10% of the building permit fee.

What plumbing code does Chelan County use?

The county adopts the Uniform Plumbing Code under Chapter 3.04, including Part II Building Sewers, Sections 713 through 723 and Tables 7-7 and 7-8, per Section 3.04.110, and amends the UPC's building sewer definition in Section 3.04.105.

Who is responsible for maintaining the building sewer line?

Under Section 3.04.105, the property owner maintains the building sewer starting two feet outside the outer foundation wall of the structure and running to the sanitary sewer main or on-site septic system; the county's Uniform Plumbing Code adoption governs everything on that segment.

Sources & Official References

[1]Chelan County Code §§ 3.04.105, 3.04.110, 3.24.010

Other rules in Chelan County

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All Chelan County rules

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