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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 4,296 sections for San Antonio, TX, the 2024 IRC

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  • E3603.4

    Grounding Electrode Conductor Size

    • The grounding electrode conductor is sized from the largest service-entrance conductor; rod/pipe/plate-only runs need no more than 6 Cu / 4 Al, concrete-encased-only runs no more than 4 Cu (NEC 250.66).

    International Residential Code, 2024 · Chapter 36, ServicesRead the full text (opens UpCodes in a new tab)

  • IB 211

    Final tree canopy · Tree preservation

    Used in checks
    • Final tree canopy at least 38% of the lot (preservation plus two new trees).
    • Preserve at least 35% of protected trees and canopy; heritage trees 100%.

    San Antonio DSD Information Bulletin 211

  • R802.5.2.1

    Ceiling Joists Lapped

    • Ceiling joists lap at least 3 in or butt over a bearing wall; where they form the tie, laps are nailed per the heel table and butts get equal ties.

    International Residential Code, 2024 · Chapter 8, Roof-Ceiling 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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