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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 1,598 sections for San Antonio, TX, the 2024 IRC

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  • R310.3

    Location

    • Smoke alarms go in each bedroom, outside each sleeping area and on every story including basements and habitable attics.
    • Keep smoke alarms at least 3 ft from the door of a bathroom with a tub or shower, unless that blocks a required spot.
    • Where a room off a bedroom hallway has a ceiling 24 in or more above the hall's, put alarms in both the hall and that room.

    International Residential Code, 2024 · Chapter 3, Building PlanningRead the full text (opens UpCodes in a new tab)

  • R302.10.4

    Exposed Attic Insulation

    • Exposed insulation on an attic floor needs a critical radiant flux of at least 0.12 W/cm2.

    International Residential Code, 2024 · Chapter 3, Building PlanningRead the full text (opens UpCodes in a new tab)

  • R306.3.1

    Location and Site Preparation

    • New or substantially improved coastal buildings sit landward of mean high tide; altering dunes or mangroves needs an engineering analysis.

    International Residential Code, 2024 · Chapter 3, Building PlanningRead the full text (opens UpCodes in a new tab)

  • R703.3

    Wall Covering Nominal Thickness and Attachments

    • Siding thickness and nailing follow Table R703.3(1) and the maker's instructions, based on 16 in studs; screws replace nails on steel (No. 6, 7 or 8 for 0.099, 0.113 or 0.120 in nails).

    International Residential Code, 2024 · Chapter 7, Wall CoveringRead 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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