HVAC Permits in Washington
Complete guide to HVAC permit requirements, energy code compliance, and building department information for contractors working in Washington.
Washington Energy Code Requirements
Understanding the energy efficiency standards that govern HVAC installations in Washington
Current Energy Code
2021 IECC
Current Standard
Statewide energy efficiency requirements for HVAC systems, equipment, and building envelope performance.
Common Requirements
Important Note
Local jurisdictions may have additional requirements beyond the state energy code. Always verify specific compliance needs with your local building department.
HVAC Permits by City in Washington
Seattle
Zone 4CKing County • 62 ZIP codes
Spokane
Zone 5BSpokane County • 49 ZIP codes
Tacoma
Zone 4CPierce County • 45 ZIP codes
King
Zone 4CKing County • 42 ZIP codes
Pierce
Zone 4CPierce County • 28 ZIP codes
Snohomish
Zone 4CSnohomish County • 26 ZIP codes
Lewis
Zone 4CLewis County • 20 ZIP codes
Grays Harbor
Zone 4CGrays Harbor County • 19 ZIP codes
Clark
Zone 4CClark County • 19 ZIP codes
Yakima
Zone 5BYakima County • 19 ZIP codes
Stevens
Zone 6BStevens County • 19 ZIP codes
Kitsap
Zone 4CKitsap County • 18 ZIP codes
Okanogan
Zone 6BOkanogan County • 18 ZIP codes
Whitman
Zone 5BWhitman County • 18 ZIP codes
Grant
Zone 5BGrant County • 15 ZIP codes
Klickitat
Zone 5BKlickitat County • 14 ZIP codes
Chelan
Zone 5BChelan County • 13 ZIP codes
Whatcom
Zone 4CWhatcom County • 12 ZIP codes
Skagit
Zone 4CSkagit County • 12 ZIP codes
Thurston
Zone 4CThurston County • 12 ZIP codes
Pacific
Zone 4CPacific County • 11 ZIP codes
Kittitas
Zone 5BKittitas County • 10 ZIP codes
Cowlitz
Zone 4CCowlitz County • 10 ZIP codes
Lincoln
Zone 5BLincoln County • 10 ZIP codes
San Juan
Zone 4CSan Juan County • 9 ZIP codes
Clallam
Zone 4CClallam County • 9 ZIP codes
Mason
Zone 4CMason County • 9 ZIP codes
Benton
Zone 5BBenton County • 9 ZIP codes
Douglas
Zone 5BDouglas County • 8 ZIP codes
Ferry
Zone 6BFerry County • 8 ZIP codes
Walla Walla
Zone 5BWalla Walla County • 8 ZIP codes
Jefferson
Zone 4CJefferson County • 7 ZIP codes
Island
Zone 4CIsland County • 6 ZIP codes
Pend Oreille
Zone 6BPend Oreille County • 6 ZIP codes
Adams
Zone 5BAdams County • 5 ZIP codes
Franklin
Zone 5BFranklin County • 5 ZIP codes
Skamania
Zone 5BSkamania County • 4 ZIP codes
Wahkiakum
Zone 4CWahkiakum County • 4 ZIP codes
Asotin
Zone 5BAsotin County • 3 ZIP codes
Columbia
Zone 5BColumbia County • 2 ZIP codes
Garfield
Zone 5BGarfield County • 1 ZIP codes
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Frequently Asked Questions
Everything you need to know about HVAC permits and energy code compliance in Washington
1What energy code does Washington follow?
Washington follows the 2021 IECC for energy efficiency requirements. This includes specific standards for HVAC equipment efficiency, duct design, and building envelope performance.
2Are Manual J calculations required in Washington?
Most jurisdictions in Washington require Manual J load calculations for proper HVAC system sizing. Our free load calculation tool can generate the professional reports you need for permits.
3How long does it take to get HVAC permits in Washington?
Permit processing times vary by jurisdiction, typically ranging from 1-3 weeks. Having complete documentation including load calculations can speed up the process. Check with your local building department for specific timeframes.
4Do I need different permits for different types of HVAC work?
Yes, permit requirements vary based on the scope of work. New installations typically require mechanical permits, while simple repairs may not need permits. Replacements usually require permits if there are changes to the system capacity or ductwork.
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