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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 237 sections for San Antonio, TX, the 2024 IRC and IBC

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  • N1104.1.2

    Exterior Lighting Power Requirements

    • Total connected exterior lighting stays within the allowance, excluding safety, emergency, exit, signal, athletic, temporary, art, pool, in-unit and egress lighting.

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

  • N1108.2.10

    Whole-Home Lighting Control

    • Whole-home lighting credit: one switch by the main entry (or a remote system) turns off all permanent interior lights, with up to 5 percent uncontrolled.

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

  • N1102.2.10.1

    Slab-on-Grade Floor Insulation Installation

    • Prescriptive slab-edge insulation runs down from the top of the slab to the table depth (not past the footing), outward insulation is covered by paving or 10 in of soil, and full-slab insulation is continuous.

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

  • N1108.2.1.3

    Roof Solar Reflectance Index

    • Low-slope roofs in zones 0-2 earn credit with a 3-year aged SRI of 75 or more over 95 percent of the roof, excluding PV, equipment, shaded and ballasted areas.

    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.

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