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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 235 sections for San Antonio, TX, the 2024 IRC

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  • N1105.4.2

    Residence Specifications

    • Model both designs per Table N1105.4.2(1); key reference assumptions include glazing capped at 15 percent of floor area, 72/75 F setpoints, and set internal gains, ventilation and hot water formulas.

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

  • N1102.1

    General

    • The envelope complies by the table route (N1102.1.1 to 1.4 plus 1.6) or the total-UA route (N1102.1.1, 1.5 and 1.6); very low-energy spaces, unconditioned spaces and ICC 400 log homes are exempt.

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

  • N1101.14

    Certificate

    • A permanent energy certificate is posted near the furnace or utility area (not covering panel labels) listing R-values, window U and SHGC, test results, equipment, solar PV, ERI score, code edition and path, and any solar-ready zone.

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

  • N1103.13.1

    Gas Fireplace Efficiency

    • Vented gas fireplace heaters have at least 50 percent fireplace efficiency (CSA P.4.1) and Z21.88 listing; decorative units are Z21.50 listed.

    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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