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Thurston County, WA Building Safety: Building Permits (2026)

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

Key Facts

Governing section
TCC 21.81.020
Issuing department
Thurston County CPED
Zoning conformance
Required before permit issues
Enforcement tool
Stop-work order (21.81.010)

Summary

Thurston County requires a permit before you erect, move, add to, or structurally alter any building or structure outside city limits, and the permit can't issue unless the zoning use is legal.

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

No building or other structure shall be erected, moved, added to, or structurally altered without a permit therefor, issued by the department. No building permit shall be issued by the department unless the use: A.Conforms to the requirements of this title; or ... D.Has been granted a variance by the hearing examiner.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 77).

Full Breakdown

Under TCC 21.81.020, no building or other structure in unincorporated Thurston County may be erected, moved, added to, or structurally altered without a permit from the Community Planning and Economic Development department. The department can only issue that building permit if the use conforms to the applicable zoning district, has been approved as a similar/related use, was approved by the hearing examiner as a special use under Chapter 21.66, or received a variance. Chapter 14.48 TCC separately governs the building-permit application process itself.

Violations & Fines

Building or altering a structure without the required permit, or before the use is zoning-approved, exposes the owner to stop-work orders and enforcement action under TCC 21.81.010.

Frequently Asked Questions

Do I need a permit to add on to my house in unincorporated Thurston County?
Yes. TCC 21.81.020 requires a permit for any structure that is erected, moved, added to, or structurally altered.
Can the county deny my building permit even if I have plans ready?
Yes. The department won't issue it unless the use conforms to zoning, was approved as similar/related, got a special use approval, or received a variance.

Sources & Official References

Other rules in Thurston County

Fire Sprinkler RequirementsSome RestrictionsElectrical PermitsSome RestrictionsPlumbing PermitsSome RestrictionsBuilding InspectionsSome RestrictionsNoise Ordinances: Barking DogsSome RestrictionsParking Rules: Loading ZonesSome RestrictionsParking Rules: Driveway RulesSome RestrictionsParking Rules: Abandoned VehiclesSome RestrictionsFence Regulations: Retaining WallsSome RestrictionsAnimal Ordinances: Cat RulesSome Restrictions

All Thurston County rules

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