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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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  • R306.3.8

    Decks and Porches

    • Attached coastal decks meet the elevation rule; freestanding low decks aren't walled in and must stay put or break away.

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

  • R502.8.1

    Sawn Lumber

    • Notches in sawn joists are at most one-sixth of the depth, no longer than a third of the depth, and never in the middle third of the span; end notches up to a quarter of the depth.
    • Holes in sawn joists are no bigger than a third of the depth and stay 2 in from the edges, other holes and notches.

    International Residential Code, 2024 · Chapter 5, FloorsRead the full text (opens UpCodes in a new tab)

  • R401.4

    Soil Tests

    • Where data point to expansive, compressible or shifting soil, the building official decides whether a soil test is required; in SDC C and up the report gives site class and SDS.

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

  • R403.1.2

    Continuous Footing in Seismic Design Categories D

    • In SDC D, exterior walls always sit on continuous concrete or grouted masonry footings; interior braced panels need them on larger or taller buildings.
    • Where interior bracing footings are needed, they may be spaced up to 50 ft apart if cripple walls are 4 ft or less, panels sit on doubled joists or beams, and bracing lines are no more than twice the building width apart.

    International Residential Code, 2024 · Chapter 4, FoundationsRead 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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