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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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  • R302.2.4

    Parapets for Townhouses

    • Townhouse separation walls rise into a parapet at least 30 in above the roof when the roofs are within 30 in of each other in height.
    • The parapet can be skipped with a Class C roof and noncombustible, FRTW or Type X protection 4 ft each side, with no roof openings within 4 ft.
    • If one roof is more than 30 in above the other, skip the parapet but rate the wall between them 1 hour with no openings.

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

  • N1101.10.1.1

    Blown-in or Sprayed Roof and Ceiling Insulation

    • Blown or sprayed attic insulation gets depth markers, one per 300 sq ft, fixed to framing, facing the attic access, with numbers at least 1 in tall.

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

  • E3905.4.1

    Outlet Boxes Without Enclosed Devices or Utilization Equipment

    • Boxes without devices are at least 1/2 in deep (NEC 314.24(A)).

    International Residential Code, 2024 · Chapter 39, Power and Lighting DistributionRead the full text (opens UpCodes in a new tab)

  • R1001.3.2

    Horizontal Reinforcing

    • Vertical bars are enclosed in 1/4-in ties (or equal area) in the bed joints at no more than 18 in vertically, with two ties at each bend.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead 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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