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Thurston County Building Codes

 Thurston County Building Code (Title 14)

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Thurston County Code is Based on a National Model

Very few communities compose their own unique set of regulations.  Most adopt all or part of the 2012 International Building Code, a set of model codes established by the International Code Council.  Here in Washington State, the Washington State Building Code Council has adopted the ICC codes with some state amendments; likewise, Thurston County's code adopts the Washington-State amended version, with a few local changes. Specifically, Thurston County's Title 14 adopts (with amendments) these I-Codes:

  • IRC = 2012 International Residential Code (One and Two Family Dwellings and Townhomes)
  • IBC = 2012 Building Code (Structures Other Than One and Two Family Dwellings and Townhomes)
  • IMC = 2012 International Mechanical Code
  • IFC = 2012 Iternational Fire Code
  • UFC = 2012 Uniform Plumbing Code
  • VIAQ = 2012 International Mechanical Code - Ventilation, Combustion Air

Thurston County also enforces:


Read the Code

Building codes are complicated and are designed for building professionals, not the average homeowner. Please be sure to contact the Permit Assistance Center early in your project for help understanding the codes.

  • Original ICC version: Click here to read the original ICC-version of the 2012 International Code, upon which state and county codes are based.
  • Washington State amendments to ICC Code (Chapter 51-50 WAC): Click here to see how Washington State (through the Washington State Building Code Council) amended the International Code.
  • Thurston County amendments to Washington State version (TCC Title 14): Click here to see Thurston County's amendments to the to the Washington-State amended International Code. The Thurston County amendments are contained in the county building code (Title 14).
  • Use and occupancy classifications: The International Code classifies structures, or portions of structures, according to their use and occupancy. These classifications are referenced throughout building codes. The codes are contained in Chapter 3 of the 2012 International Code, but Washington State has made a few amendments. To see Washington State's amendments, click here, choose "2012 International Building Code".
  • Climatic and Geographic Design Criteria:  Click here for Thurston County's Climatic and Geographic design criteria.

Get a Synopsis

  • Click here to get a synopsis of the residential building code.

One and Two Family Dwellings and Townhomes

For residential projects (one and two-family dwellings and townhomes): See Title 14.18


Nonresidential (Commercial) Buildings and Subdivisions

For structures other than one and two family dwellings and townhomes, see Chapter 14.17 (entitled "Building Code"). All new nonresidential (commercial) uses or change of use requires contact with a commercial plan reviewer and a presubmission conference, see the "Contact Us" information below.


Manufactured Homes

For manufactured homes information, click here.


Contact Us

Questions can be emailed to staff at the email addresses below. Just click on the e-mail address and send your questions. We would be glad to help answer any question you have about your construction plans.

Commercial plan review and fire code construction inspections: Appointments must be scheduled in advance for Commercial Plan Review. You may schedule by contacting the Commercial Plan Reviewer by email or phone (360) 786-5466. Chris Edmark: edmarkc@co.thurston.wa.us

Residential plan review: Available Monday through Friday, 8am – 12:30 p.m. at the Permit Assistance Center. Tim Rubert: rubert@co.thurston.wa.us Rowland Zoller: zollerr@co.thurston.wa.us

Building inspections and requests for permit extensions: Jay Barney, Senior Bldg Inspector: barneyj@co.thurston.wa.us To request an extension of a building permit, submit a request prior to the expiration of the building permit.  Click here for the building permit extension request form

Fire marshal and fire annual safety inspection: Bobby May: mayb@co.thurston.wa.us

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