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Search the building code.

Every 2024 IRC section and the IBC as it loads, by number or topic, plus the local rules for your city. Free to search.

Detached houses, duplexes and townhouses up to 3 stories with their own exits use the IRC; every other building uses the IBC (IBC 101.2).

A random sample from 237 sections for San Antonio, TX, the 2024 IRC and IBC

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  • N1103.3.4

    Duct Systems Located in Conditioned Space

    • Ducts count as inside only if the air handler is inside and ducts are fully inside, or buried in attic insulation with leakage to outside of 1.5 cfm/100 sq ft or less, or in assemblies with an air barrier and R-10 (or half the required R) outboard.

    International Residential Code, 2024 · Chapter 11, Energy EfficiencyRead the full text (opens UpCodes in a new tab)

  • N1108.2.1.2

    Improved Fenestration

    • Improved windows credit: area-weighted vertical glazing meets the tabled U-factor and SHGC.

    International Residential Code, 2024 · Chapter 11, Energy EfficiencyRead the full text (opens UpCodes in a new tab)

  • N1104.1

    Lighting Equipment

    • Permanent luminaires reach at least 45 lumens per watt, or their lamps at least 65; appliance, disinfecting, federally regulated lamps and fixtures of 3 W or less are exempt.

    International Residential Code, 2024 · Chapter 11, Energy EfficiencyRead the full text (opens UpCodes in a new tab)

  • N1102.2.13

    Sunroom and Heated Garage Insulation

    • Sunrooms and heated garages meet the insulation rules; if thermally isolated, ceilings drop to R-19 (zones 0-4) or R-24 (5-8) and walls to R-13.

    International Residential Code, 2024 · Chapter 11, Energy EfficiencyRead the full text (opens UpCodes in a new tab)

Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.

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