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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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  • R304.1

    Location Required

    • Under-floor wood needs treated or durable lumber when joists are within 18 in of the ground, girders 12 in or columns 8 in.
    • Siding, sheathing and framing need decay protection if closer than 6 in to soil or 2 in above an exposed slab or step.
    • Decay protection is also needed for framing within 8 in of ground on foundation walls, sills on ground slabs without a barrier, girder pockets under 1/2 in clearance, weather-exposed members and basement columns not on a 1 in pedestal.

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

  • R608.7

    Solid Walls for Resistance to Lateral Forces

    • Each exterior concrete wall line has enough solid full-height wall for wind (from tables, with reduction factors), in segments of 24 in or more, openings no wider than 18 ft, and a segment within 6 ft of each corner.

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

  • R303.8

    Wind Resistance

    • Foam sheathing on framed walls must resist wind per ANSI/ABTG FS 100 unless backed by sheathing that does.

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

  • R1004.5

    Gasketed Fireplace Doors

    • No gasketed doors on a factory-built fireplace unless the system is UL 127 listed for them.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead 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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