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The permit application date sets the applicable codes for a given project. Below is a list of the codes that are effective on or after the specified date. Items in italics indicate a change in the adopted codes.

• California Building, Plumbing, Mechanical, and Electrical Codes, respectively:
  • California Building Code, 2007 Edition (Adopts the International Building Code, 2006 Edition with State amendments)
  • California Plumbing Code, 2007 Edition (Adopts Uniform Plumbing Code, 2006 IAPMO Edition with State amendments)
  • California Mechanical Code, 2007 Edition (Adopts the Uniform Mechanical Code, 2006 IAPMO Edition with State amendments)
  • California Electrical Code, 2007 Edition (Adopts the National Electrical Code, 2005 Edition with State amendments)
  • 2007 California Referenced Standards Code
• 2007 California Energy Code
• 2008 California Green Building Standards Code
• City of Walnut Creek Municipal Code

Applications received on or after January 1, 2008:

• California Building, Plumbing, Mechanical, and Electrical Codes, respectively:
  • California Building Code, 2007 Edition (Adopts the International Building Code, 2006 Edition with State amendments)
  • California Plumbing Code, 2007 Edition (Adopts Uniform Plumbing Code, 2006 IAPMO Edition with State amendments)
  • California Mechanical Code, 2007 Edition (Adopts the Uniform Mechanical Code, 2006 IAPMO Edition with State amendments)
  • California Electrical Code, 2007 Edition (Adopts the National Electrical Code, 2005 Edition with State amendments)
  • 2007 California Referenced Standards Code
• 2007 California Energy Code
• City of Walnut Creek Municipal Code

Applications received on or after October 1, 2005:

• California Building, Plumbing, Mechanical, and Electric Codes, respectively:
  • California Building Code, 2001 Edition (Adopts the Uniform Building Code, 1997 Edition with State amendments)
  • California Plumbing Code, 2001 Edition (Adopts Uniform Plumbing Code, 2000 IAPMO Edition with State amendments)
  • California Mechanical Code, 2001 Edition (Adopts the Uniform Mechanical Code, 2000 IAPMO Edition with State amendments)
  • California Electric Code, 2004 Edition (Adopts the National Electric Code, 2002 Edition with State amendments)
  • Uniform Building Code Standards, 1997 Edition
• 2005 Building Energy Efficiency Standards for Residential and Nonresidential Buildings
• City of Walnut Creek Municipal Code

Applications received on or after August 1, 2005:

• California Building, Plumbing, Mechanical, and Electric Codes, respectively:
  • California Building Code, 2001 Edition (Adopts the Uniform Building Code, 1997 Edition with State amendments)
  • California Plumbing Code, 2001 Edition (Adopts Uniform Plumbing Code, 2000 IAPMO Edition with State amendments)
  • California Mechanical Code, 20001 Edition (Adopts the Uniform Mechanical Code, 2000 IAPMO Edition with State amendments)
  • California Electric Code, 2004 Edition (Adopts the National Electric Code, 2002 Edition with State amendments)
  • Uniform Building Code Standards, 1997 Edition
• Energy Efficiency Standards for Residential and Nonresidential Buildings, June 2001
• City of Walnut Creek Municipal Code

Applications received on or after November 1, 2002:

• California Building, Plumbing, Mechanical, and Electric Codes, 2001 Editions, which adopt by reference the following codes, respectively:
  • Uniform Building Code, 1997 Edition
  • Uniform Plumbing Code, 2000 IAPMO Edition
  • Uniform Mechanical Code, 2000 IAPMO Edition
  • National Electric Code, 1999 Edition
  • Uniform Building Code Standards, 1997 Edition
• Energy Efficiency Standards for Residential and Nonresidential Buildings, June 2001
• City of Walnut Creek Municipal Code