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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 4,296 sections for San Antonio, TX, the 2024 IRC

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  • N1107.2

    Tropical Climate Region

    • Tropical homes cool no more than half the space, have no heating, get 80 percent of water heating from renewables, and meet glazing, roof, ventilation and ceiling fan rules.

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

  • M1601.1

    Duct Design

    • Ducts for heating, cooling and ventilation follow this section and ACCA Manual D, the appliance instructions or another approved method.

    International Residential Code, 2024 · Chapter 16, Duct SystemsRead the full text (opens UpCodes in a new tab)

  • R404.1.2.1

    Masonry Foundation Walls

    • Masonry foundation walls are sized from the plain or reinforced tables by wall height, backfill height and soil class; rubble stone isn't allowed in SDC D or for townhouses in C.
    • Unbalanced backfill is measured from outside grade down to the footing top or inside grade, or to the top of an interior slab bearing against the wall.

    International Residential Code, 2024 · Chapter 4, FoundationsRead the full text (opens UpCodes in a new tab)

  • R606.9

    Allowable Stresses

    • Masonry compressive stress stays within Table R606.9 values, using the weakest material in a mixed wall, and facing units carrying load are at least 1-1/2 in thick.

    International Residential Code, 2024 · Chapter 6, Wall ConstructionRead 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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