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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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  • R313.1

    Minimum Height

    Used in checks
    • Habitable rooms and hallways have at least 7 ft ceilings; baths, toilet rooms and laundries at least 6 ft 8 in.
    • With sloped ceilings, the required area has at least 5 ft of headroom and half of it at least 7 ft.
    • A showerhead needs 6 ft 8 in of ceiling over a 30 x 30 in area.
    • Beams, ducts and other obstructions in a habitable basement may hang down to 6 ft 4 in; beams spaced 36 in or more apart may come to 78 in.

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

  • R302.2.4

    Parapets for Townhouses

    • Townhouse separation walls rise into a parapet at least 30 in above the roof when the roofs are within 30 in of each other in height.
    • The parapet can be skipped with a Class C roof and noncombustible, FRTW or Type X protection 4 ft each side, with no roof openings within 4 ft.
    • If one roof is more than 30 in above the other, skip the parapet but rate the wall between them 1 hour with no openings.

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

  • R318.7.5.1

    Risers

    • Risers are 7-3/4 in or less, vary no more than 3/8 in within a flight, and slope no more than 30 degrees.
    • Open risers more than 30 in above the floor below can't pass a 4 in ball.

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

  • R602.12.4

    Number of Bracing Units

    • Each side of the rectangle needs a set number of bracing units by wind speed, story and side length, times 1.2-1.4 in Exposure C.

    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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