Residential: International Residential Code, 2018 Edition Commercial: International Building Code, 2018 Edition Electrical: National Electric Code, 2017 Edition Plumbing: International Plumbing Code, 2018 Edition Mechanical: International Mechanical Code, 2018 Edition Fire: International Fire Code, 2018 Maintenance: International Property Maintenance Code, 2018 Edition Energy: International Energy Conservation Code, 2018 Zoning: Chapter 400 of the Brentwood City Code