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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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  • P2603.5

    Freezing

    • Where the winter design temperature is 32 F or lower, pipes outside, in exterior walls, attics or crawl spaces are protected from freezing; water service is at least 12 in deep and 6 in below the frost line.

    Local review: San Antonio's winter design temperature is roughly 30 F, so the freeze-protection rule applies; confirm the frost depth the city publishes for water service burial.

    International Residential Code, 2024 · Chapter 26, General Plumbing RequirementsRead the full text (opens UpCodes in a new tab)

  • N1103.1.2

    Heat Pump Supplementary Heat

    • Heat pump backup heat runs only when the compressor can't keep up, during defrost, or if the compressor or thermostat fails.

    International Residential Code, 2024 · Chapter 11, Energy EfficiencyRead the full text (opens UpCodes in a new tab)

  • P2902.5.3

    Lawn Irrigation Systems

    • Lawn irrigation needs an AVB, PVB or RP; nothing valved after an AVB; RP where chemicals are injected.

    Local review: San Antonio Water System (SAWS) sets its own irrigation backflow and testing rules; check SAWS requirements alongside this section.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead the full text (opens UpCodes in a new tab)

  • G2421.5

    Flashback Arrestor Check Valve

    • Gas used with oxygen for hot work gets listed flashback arrestor check valves on both lines.

    International Residential Code, 2024 · Chapter 24, Fuel GasRead 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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