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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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  • R406.2

    Concrete and Masonry Foundation Waterproofing

    • Where groundwater is high, below-grade walls are waterproofed over the same height with one of six listed membranes, laps sealed.
    • Don't use organic solvents on EPS form walls; asphalt is ASTM D449 Type C and hot-applied below 200°F.

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

  • R309.2

    One- And Two-Family Dwellings Automatic Sprinkler Systems

    • The model code requires sprinklers in new one- and two-family homes; additions to unsprinklered homes are exempt.

    Local review: Texas law bars cities from requiring sprinklers in one- and two-family homes; confirm San Antonio deletes this before enforcing.

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

  • R404.1.1

    Design Required

    • Concrete and masonry foundation walls are engineered if they face groundwater pressure, or hold back more than 48 in of fill without bracing top or bottom.

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

  • R608.5.4

    Reinforcement Installation Details

    • Lap splices run 20 to 45 in and straight development 15 to 34 in by bar size and grade; cover and spacing rules match foundation walls.

    International Residential Code, 2024 · Chapter 6, Wall 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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