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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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  • N1108.2.3.1

    Compact Hot Water Distribution System Option

    • Compact hot water credit: no more than 16 oz of water in the pipe from the nearest hot source to each fixture; recirculation loops need demand control and a dedicated return.

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

  • N1103.5.1

    Heated Water Circulation and Temperature Maintenance Systems

    • Circulation and heat-trace systems follow their subsections; automatic controls and pumps need access, manual controls ready access.

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

  • N1111.1.1

    Building Thermal Envelope

    • Altered envelope may not lose R-value or gain U-factor; storm windows, roof recovers, film on single pane and some roof replacements are exempt.

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

  • N1102.1.6

    Rooms Containing Fuel-Burning Appliances

    • In zones 3 to 8, open-combustion appliances fed by combustion air ducts sit outside the envelope or in a sealed, insulated room with a gasketed door; the air duct is R-8 through conditioned space. Direct-vent appliances are exempt.

    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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