Walla Walla County, WA - 2026 Building Permit Guide

Permit Authority

All unincorporated properties in Walla Walla County (areas outside the incorporated cities of Walla Walla, College Place, Waitsburg, and Prescott).

Department

Community Development — Building Division

Address

310 W. Poplar Street, Suite 200, Walla Walla, WA 99362

Phone

(509) 524-2610

Email

permits@wwcowa.gov

Website

https://www.wwcowa.gov/government/community_development/building.php

Online Permit Portal

Application Process

1. Use the Complete Application Guide on the county website to determine which forms and supplemental materials are required for your project type.
2. Prepare the application package: completed application with all property owner or project representative signatures, one full set of construction plans (11 inch x 17 inch minimum, drawn to scale, including site plan), energy code compliance documentation, engineering where required, and all applicable supplemental materials.
3. Submit via eTRAKiT portal (for eligible permit types), email to permits@wwcowa.gov, postal mail, or in-person drop-box at 310 W. Poplar Street, Suite 200.
4. Pay the $75 application fee plus the estimated plan review fee (65 percent of building permit fee) to initiate formal review.
5. Application undergoes completeness review; planning approvals may be required before building review begins for some project types.
6. Plans Examiner reviews for code compliance; review process up to 45 days (most completed sooner).
7. Respond to any plan review correction comments.
8. Permit issued upon approval; post permit and approved plans on site during construction.
9. Schedule required inspections through eTRAKiT portal or by calling (509) 524-2611.

Typical processing time: Up to 45 days for initial plan review; most projects completed sooner. Resubmittals vary by scope.

Source: Community Development — Building Division

General Requirements

Building permits are required for new construction, additions, alterations, remodels, relocations of structures, change of use, mechanical permits, plumbing permits, signage, grading, and other structural work.

Required Documents

• Completed building permit application with all owner/representative signatures
• Construction plans drawn to scale on 11 inch x 17 inch minimum paper
• Site plan showing parcel number, legal description, street address, and location of proposed work
• Truss and beam specifications where applicable
• Calculations and footings sized for structural loads
• Energy Code compliance forms
• Any required engineering or calculations
• SEPA environmental checklist (if applicable for projects above threshold)

Permit validity

Permits must be activated and inspections scheduled within applicable timeframes. Approved inspection required at least every 180 calendar days to demonstrate substantial progress.

Building code

2021 IBC with Washington State amendments (effective January 17, 2024 for county fees; state-effective March 15, 2024 for building code)

Owner-builder

Owner-builders must comply with all permit requirements and code standards.

Contractor requirements

Contractors must hold a valid Washington State contractor registration with L&I.

Fees

Minimum permit fee

$75 application fee at submission

Plan check fee

65 percent of building permit fee, due at time of application submission

Permit fee formula

Building permit fees calculated based on project type, size (square footage), occupancy type, and construction type using ICC valuation table

Trade permit fee

Included in standard permit valuation based on ICC table

Reinspection fee

Applies if work not ready or corrections unresolved; amount per county fee schedule

Penalty (no permit)

Investigation fee assessed equal to the permit fee for work commenced without a permit (in addition to regular permit fee)

Payment note

Permit fees paid on permit issuance; plan review fees paid at application. Contact (509) 524-2610 or permits@wwcowa.gov for fee estimates by project type. Fee schedule available on county website.

Fees change. Verify current amounts at the official fee schedule (effective January 17, 2024).

Work That Does NOT Require a Permit

• Residential accessory storage structures (sheds): exempt only if detached, on same lot as existing single-family dwelling, non-habitable, maximum 200 sq ft, maximum wall height 10 feet, minimum 6 feet from other structures, no heat/plumbing/mechanical systems, not in floodplain/critical areas/shoreline areas
• Fences up to 7 feet high (zoning approval may still be required)
• Retaining walls up to 4 feet (without surcharge)
• Water tanks: on grade, maximum 5,000 gallons, height not exceeding 2x width or diameter
• Decks, sidewalks, ramps, driveways: no roof cover, maximum 30 inches above grade
• Interior finish work (painting, flooring, cabinets, countertops)
• Prefabricated pools under 24 inches deep
• Playground equipment for single-family homes
• Window awnings up to 54 inches projection (without additional structural support)
• Siding repair/replacement (non-fire-resistive areas)
• Insulation retrofits with no structural changes
• Door and window replacement (like-for-like; does not apply to egress bedroom windows)
• Re-roofing (shingles only; not applicable in wildfire hazard zones requiring fire-resistive roofing)

Important: Exemptions do not apply to electrical, plumbing, or mechanical work—separate permits required for those systems. Even if a building permit is exempt, other county approvals (land use, zoning, critical areas, shoreline, SEPA) may still apply. Agricultural structures: tractor/farm equipment storage and agricultural product storage are explicitly excluded from the shed exemption. Agricultural buildings generally require permits even when modest in size. Confirm exemption eligibility with county before proceeding.

Inspections

How to Schedule

• eTRAKiT Web Portal (online)
• Inspection Scheduling: (509) 524-2611 (phone)

Scheduling deadline

Schedule inspections through eTRAKiT or by phone; approved construction plans and permit must be on site

Inspection hours

Monday–Friday, 10:00 AM to 3:00 PM (in-person counter); appointments available outside these hours

Time windows

Standard business hours with scheduled appointment availability

Typical inspection sequence: Typical sequence: Footing/Foundation (foundation elevation verification required for flood zone properties), Under-slab plumbing (where applicable), Framing (lowest floor elevation verification required for flood zone properties), Plumbing rough-in, Mechanical rough-in (ductwork before covering), Insulation, Final inspection (required before occupancy; Certificate of Occupancy issued upon approval). Approved inspection required at least every 180 calendar days to demonstrate substantial progress.

Contact county for details on remote inspection availability.

Additional Resources

• Building code: 2021 IBC with Washington State amendments (effective January 17, 2024 for county fees; state-effective March 15, 2024 for building code)
• Verify contractor license: WA L&I Contractor Lookup
• Zoning information: View zoning info
• Building FAQs
• Building Permit Activity (public log)
• County Code Title 15 (Building)
• County Code Title 18 (Critical Areas)
• Public Works Permits (road approach, utilities)
• L&I Electrical Permits
• License lookup guide: Washington Contractor License Requirements
• Contract template: Washington Homeowner-Contractor Agreement
• Washington hub: Washington Contractor License & Permit Hub

Frequently Asked Questions

Walla Walla County Building Permit FAQ

Do I need a building permit in unincorporated Walla Walla County, WA?

Building permits are required for new construction, additions, alterations, remodels, relocations of structures, change of use, mechanical permits, plumbing permits, signage, grading, and other structural work.

How much does a building permit cost in unincorporated Walla Walla County, WA?

The minimum permit fee is $75 application fee at submission. Fees are calculated as: Building permit fees calculated based on project type, size (square footage), occupancy type, and construction type using ICC valuation table. Plan check fee: 65 percent of building permit fee, due at time of application submission.

How do I apply for a building permit in unincorporated Walla Walla County, WA?

1. Use the Complete Application Guide on the county website to determine which forms and supplemental materials are required for your project type. 2. Prepare the application package: completed application with all property owner or project representative signatures, one full set of construction plans (11 inch x 17 inch minimum, drawn to scale, including site plan), energy code compliance documentation, engineering where required, and all applicable supplemental materials. 3. Submit via eTRAKiT portal (for eligible permit types), email to permits@wwcowa.gov, postal mail, or in-person drop-box at 310 W. Poplar Street, Suite 200. 4. Pay the $75 application fee plus the estimated plan review fee (65 percent of building permit fee) to initiate formal review. 5. Application undergoes completeness review; planning approvals may be required before building review begins for some project types. 6. Plans Examiner reviews for code compliance; review process up to 45 days (most completed sooner). 7. Respond to any plan review correction comments. 8. Permit issued upon approval; post permit and approved plans on site during construction. 9. Schedule required inspections through eTRAKiT portal or by calling (509) 524-2611.

How long does it take to get a building permit in unincorporated Walla Walla County, WA?

Typical processing time is Up to 45 days for initial plan review; most projects completed sooner. Resubmittals vary by scope..

What work is exempt from building permits in unincorporated Walla Walla County, WA?

The following work is generally exempt: Residential accessory storage structures (sheds): exempt only if detached, on same lot as existing single-family dwelling, non-habitable, maximum 200 sq ft, maximum wall height 10 feet, minimum 6 feet from other structures, no heat/plumbing/mechanical systems, not in floodplain/critical areas/shoreline areas; Fences up to 7 feet high (zoning approval may still be required); Retaining walls up to 4 feet (without surcharge); Water tanks: on grade, maximum 5,000 gallons, height not exceeding 2x width or diameter; Decks, sidewalks, ramps, driveways: no roof cover, maximum 30 inches above grade; Interior finish work (painting, flooring, cabinets, countertops); Prefabricated pools under 24 inches deep; Playground equipment for single-family homes; Window awnings up to 54 inches projection (without additional structural support); Siding repair/replacement (non-fire-resistive areas); Insulation retrofits with no structural changes; Door and window replacement (like-for-like; does not apply to egress bedroom windows); Re-roofing (shingles only; not applicable in wildfire hazard zones requiring fire-resistive roofing). Note: Exemptions do not apply to electrical, plumbing, or mechanical work—separate permits required for those systems. Even if a building permit is exempt, other county approvals (land use, zoning, critical areas, shoreline, SEPA) may still apply. Agricultural structures: tractor/farm equipment storage and agricultural product storage are explicitly excluded from the shed exemption. Agricultural buildings generally require permits even when modest in size. Confirm exemption eligibility with county before proceeding.

How do I schedule a building inspection in unincorporated Walla Walla County, WA?

Inspections can be scheduled via: eTRAKiT Web Portal, Inspection Scheduling: (509) 524-2611. Schedule inspections through eTRAKiT or by phone; approved construction plans and permit must be on site.