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Modular Homes Washington Modular Homes Building Codes

Below you can find links to Modular Home Building Codes and Building Authorities for the state of Washington.

Additional Resources

• Washington has adopted a statewide building code, State Building Code (SBC).The building, plumbing, mechanical, electrical and fire codes are mandatory minimum codes for all jurisdictions. The SBC is incorporated in the Washington Administrative Code (WAC) in several chapters (see below for specific numbers).
• Washington updates its codes every three years.

Code Alert:
The adoption of the 2009 International Building, Residential, Mechanical and Fire Codes and the 2009 Uniform Plumbing Code, with state amendments, will be effective on July 1, 2010, along with amendments to the Washington State Energy Code.

Washington Modular Homes Building Codes

Code Type Code Model Amendment Contact
Building/Dwelling Code IBC 2006 (State Building Code, WAC Chapter 51-50) Online
Structural Code IBC 2006 (State Building Code, WAC Chapter 51-50) Online
Plumbing Code UPC 2006 (State Building Code, WAC Chapter 51-56 and 51-57) Online
Mechanical Code IMC 2006 (State Building Code, WAC Chapter 51-52) Online
Electrical Code NEC 2005 [Laws, Rules & Reg. For Installing El. Wires & Equip. (WAC) 296-46b] Online
Fire/Life Safety Code IFC 2006 (State Building Code, WAC Chapter 51-54 Online
Accessibility Code ADAAG (State Building Code, WAC Chapter 51-40) Online
Energy Code 2006 Washington State Energy Code (State Building Code, WAC Chapter 51-11) Online
Elevator Code AMSE A17.1-2004 Online
Gas Code IMC 2006 (NFPA 58 & 54) (State Building Code, WAC Chapter 51-42) Online
Boiler Code ASME Boiler & Pressure Vessel Code 1998; NBIC 1995 with addenda Online
Other Codes Ventilation and IAQ Code (State Building Code, WAC Ch. 51-13)

Washington Building Authorities (BA)

Building Authorities are those government officials who are the final authority on questions in a particular area (or jurisdiction).
Functional Area Contact
Structural Phone: (360) 725-2969
Fax: (360) 586-9383
Plumbing Phone: (360) 725-2964
Fax: (360) 586-9383
Mechanical Phone: (360) 725-2964
Fax: (360) 586-9383
Electrical Electrical Inspection, Dept. of Labor & Industry
Phone: (360) 902-5249
Fax: (360) 902-5292
Accessibility Phone: (360) 725-2964
Fax: (360) 586-5880
Energy Phone: (360) 725-2964
Fax: (360) 586-9383
Planning/Land Use Growth Management Services
Phone: (360) 753-2222
Environmental Department of Ecology
Phone: (360) 407-6000
Health Department Department of Environmental Health
Phone: (360) 236-3000
Fire Marshal State Fire Marshal
Phone: (360) 753-0404
Forestry/Parks Department of Natural Resources
Phone: (360) 902-1000
Transportation Department of Transportation
Phone: (360) 705-7000
Boiler Inspector Phone: (360) 902-5270
Fax: (360) 902-5292
Elevator Inspector Chief Elevator Inspector, Dept. of Labor & Industr
Phone: (360) 902-6128
Fax: (360) 902-6132

Washington Municipalities

Modular Home Building Codes are also available for the following municipalities within Washington:


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