2021 International Residential Code®

Grouped product items
Qty Format Price Member Price Member Savings
Soft Cover

Item #: 3100S21

$152.00
Volume Discount
Quantity Price
1-24 $152.00
25-49 $144.40
50-99 $136.80
100 and up $129.20
$114.00
Volume Discount
Quantity Price
1-24 $114.00
25-49 $108.30
50-99 $102.60
100 and up $96.90
$38.00
Soft Cover & PDF/Redline Download

Item #: 3100SPR21

$203.00
$152.00
$51.00
Loose Leaf

Item #: 3100L21

$177.00
Volume Discount
Quantity Price
1-24 $177.00
25-49 $168.15
50-99 $159.30
100 and up $150.45
$133.00
Volume Discount
Quantity Price
1-24 $133.00
25-49 $126.35
50-99 $119.70
100 and up $113.05
$44.00
Loose Leaf & PDF/Redline Download

Item #: 3100LPR21

$220.00
$165.00
$55.00
PDF/Redline Download

Item #: 8710PR21

$137.00
Volume Discount
Quantity Price
1 $137.00
2 $102.75
3-4 $95.90
5-9 $82.20
10 and up $75.35
$103.00
Volume Discount
Quantity Price
1 $103.00
2 $77.25
3-4 $72.10
5-9 $61.80
10 and up $56.65
$34.00

This comprehensive code comprises all building, plumbing, mechanical, fuel gas and electrical requirements for one- and two-family dwellings and townhouses up to three stories. The 2021 IRC® contains many important changes such as:

  • Braced wall lines must be placed on a physical wall or placed between multiple walls.
  • The rated separation for two-family dwellings is 1 hour whether or not a lot line exists between units.
  • Emergency escape and rescue openings require a clear 36-inch-wide path to a public way.
  • An engineered design is required for storm shelters.
  • A habitable attic is limited to one-half the area of the story below and the dwelling requires sprinklers.
  • Updated Wind Speed maps match IBC and ASCE 7 maps.
  • Deck design now considers snow load, tributary area for footing and post height, and guard details.
  • Specific requirements for deck guardrails were added.
  • Component and cladding wind pressures in Table R301.2(2) are updated for new design wind speeds and hip or gable roof profiles.
  • Minimum footing size tables are revised to more accurately reflect current practice.
  • Cripple wall requirements apply only to exterior cripple walls.
  • New appendices for cob construction and 3D printed construction are added.
  • A 30 percent reduction of airflow is permitted for balanced ventilation systems.
  • Commercial gas cooking appliances are prohibited.
  • The head pressure for a water test of DWV systems increased to 10 feet.
  • Air vacuum testing is now permitted for plastic piping DWV systems.
  • Section P2904 for dwelling sprinklers is expanded to more closely align with NFPA 13D.
  • An emergency service disconnect is required in a readily accessible outdoor location.
  • A surge-protective device (SPD) is now required at the service panel.
  • The number of receptacle outlets required for peninsular and island countertops in kitchens is determined by the area of the countertop surface.
  • GFCI protection is now required for damp and wet locations not included in the other 10 areas requiring GFCI protection.

The 2021 IRC® Redline is still in development and you will received an updated PDF once completed.

More Information
Description: Links

Front Matter (Title Page, TOC, Preface and Forward)

Referenced Standards

Publisher ICC
This site has been tested and optimized for Firefox, Safari, Chrome and Internet Explorer 10+. We recommend users of early versions of Internet Explorer to update to Version 11 or later.