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 4,296 sections for San Antonio, TX, the 2024 IRC

Show another sample

  • R1003.18

    Chimney Clearances

    • Interior chimneys or those in an exterior wall keep 2 in airspace to combustibles; chimneys fully outside the walls keep 1 in; the gap stays open except for fireblocking.
    • Clearance exceptions: UL 1777 zero-clearance liners allow contact; built into a masonry wall or abutting the sidewalls, combustibles stay 8 in from the inside of the nearest flue liner.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead the full text (opens UpCodes in a new tab)

  • M2105.15.1

    Heat Exchangers

    • Heat exchangers get shutoffs on supply and return, unless integral to a boiler that M2001.3 valves already isolate.

    International Residential Code, 2024 · Chapter 21, Hydronic PipingRead the full text (opens UpCodes in a new tab)

  • R703.8.2

    Exterior Veneer Support

    • Outside SDC D, veneer of 40 psf or less can sit on framing designed for L/600, with a movement joint where it meets foundation-supported veneer.

    International Residential Code, 2024 · Chapter 7, Wall CoveringRead the full text (opens UpCodes in a new tab)

  • P2902.3.6

    Double-Check Backflow Prevention Assemblies

    • Double check assemblies meet ASSE 1015 or AWWA C510 (detector type ASSE 1048) and work under continuous pressure.

    International Residential Code, 2024 · Chapter 29, Water Supply and DistributionRead 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