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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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  • R401.3

    Drainage

    • Grade falls at least 6 in in the first 10 ft away from the foundation, with runoff sent to a safe approved outlet.
    • Where the lot can't give that fall, use drains or swales; paving within 10 ft of the house slopes at least 2% away.

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

  • R302.12

    Draftstopping

    • With usable space above and below, draftstops keep concealed floor-ceiling spaces at 1,000 sq ft or less where the ceiling is suspended or the floor uses open-web trusses.

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

  • R602.10.5

    Minimum Length of a Braced Wall Panel

    • Most braced panels are at least 48 in long on 8 to 10 ft walls, 53 in at 11 ft and 58 in at 12 ft; let-in braces need 55 to 69 in.
    • Portal frames can be as narrow as 16 to 30 in by header height; ABW panels 28 to 42 in in SDC A-C.

    International Residential Code, 2024 · Chapter 6, Wall ConstructionRead the full text (opens UpCodes in a new tab)

  • R322.1

    Dwelling Units or Sleeping Units

    • Buildings with four or more dwelling or sleeping units follow the IBC accessibility chapter for R-3; owner-occupied lodging with five or fewer guestrooms is exempt.

    International Residential Code, 2024 · Chapter 3, Building PlanningRead 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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