Skip to content
Built4UIQ
Log inSign up free

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 235 sections for San Antonio, TX, the 2024 IRC

Show another sample

  • N1108.2.3.1.1

    Water Volume Determination

    • Pipe volume is the sum of pipe, fittings, valves and manifolds from the nearest hot source, using Table N1108.2.3.1, excluding fixture valves, flex connectors and the fixture itself.

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

  • N1102.2.5

    Access Hatches and Doors

    • Access hatches and doors to attics and crawl spaces are insulated like the surrounding assembly; in zones 0-4 pull-down stairs may be R-10 average (R-13 over 75 percent), 13.5 sq ft max, weatherstripped.

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

  • N1101.10.6

    Airspaces

    • An airspace R-value counts only if the cavity is enclosed and unventilated, or behind anchored veneer with bottom-only weeps at 15 in or more and a closed top; ventilated cavities are tested to ASTM C1363.

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

  • N1102.2.6

    Mass Walls

    • Mass walls are above-ground concrete, block, ICF, brick (not veneer), adobe, earth, solid or mass timber or logs, or any wall with heat capacity of 6 Btu/sq ft F or more.

    International Residential Code, 2024 · Chapter 11, Energy EfficiencyRead 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.

Check your plans against these codes

Start an application and get every flag with its section and fix.

Start an application