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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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  • R404.1.3.3.3

    Maximum Aggregate Size

    • Coarse aggregate is no bigger than a fifth of the form width or three-quarters of the clear bar spacing, unless approved with removable forms.

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

  • R1003.6

    Changes in Dimension

    • Chimney walls and flue liners keep the same size and shape within 6 in above and below any floor, ceiling or roof they pass through.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead the full text (opens UpCodes in a new tab)

  • R703.10

    Fiber Cement Siding

    • Fiber-cement panels and lap siding (up to 12 in wide) meet ASTM C1186 Grade II; panel joints fall on framing and are protected; lap siding laps 1-1/4 in with ends caulked, covered or flashed.

    International Residential Code, 2024 · Chapter 7, Wall CoveringRead 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)

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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