Model Codes › IRC 2021
International Residential Code
IRC 2021 · International Code Council
This is the model code as published. It carries no state or local amendments. Most jurisdictions adopt an I-Code with amendments, and many are on a different edition — check what yours has adopted on its jurisdiction page before relying on anything here.
1,192 sections across 44 chapters on BuildSpec
Chapters
Chapter 1
Scope and Administration
37 sections →
Chapter 2
Definitions
4 sections →
Chapter 3
Building Planning
162 sections →
Chapter 4
Foundations
48 sections →
Chapter 5
Floors
41 sections →
Chapter 6
Wall Construction
53 sections →
Chapter 7
Wall Covering
55 sections →
Chapter 8
Roof-Ceiling Construction
40 sections →
Chapter 9
Roof Assemblies
53 sections →
Chapter 10
Chimneys and Fireplaces
48 sections →
Chapter 11
Energy Efficiency
44 sections →
Chapter 12
Mechanical Administration
8 sections →
Chapter 13
General Mechanical System Requirements
20 sections →
Chapter 14
Heating and Cooling Equipment
22 sections →
Chapter 15
Exhaust Systems
22 sections →
Chapter 16
Duct Systems
12 sections →
Chapter 17
Combustion Air
15 sections →
Chapter 18
Chimneys and Vents
21 sections →
Chapter 19
Special Fuel-Burning Equipment
7 sections →
Chapter 20
Boilers and Water Heaters
21 sections →
Chapter 21
Hydronic Piping
14 sections →
Chapter 22
Special Piping and Storage Systems
13 sections →
Chapter 23
Solar Thermal Energy Systems
37 sections →
Chapter 24
Fuel Gas
24 sections →
Chapter 25
Plumbing Administration
13 sections →
Chapter 26
General Plumbing Requirements
20 sections →
Chapter 27
Plumbing Fixtures
16 sections →
Chapter 28
Water Heaters
19 sections →
Chapter 29
Water Supply and Distribution
27 sections →
Chapter 30
Sanitary Drainage
16 sections →
Chapter 31
Vents
21 sections →
Chapter 32
Traps
7 sections →
Chapter 33
Storm Drainage
13 sections →
Chapter 34
Electrical General Requirements
16 sections →
Chapter 35
Electrical Definitions
2 sections →
Chapter 36
Services
29 sections →
Chapter 37
Branch Circuit and Feeder Requirements
28 sections →
Chapter 38
Wiring Methods
15 sections →
Chapter 39
Power and Lighting Distribution
44 sections →
Chapter 40
Devices and Luminaires
32 sections →
Chapter 41
Appliance Installation
10 sections →
Chapter 42
Swimming Pools
25 sections →
Chapter 43
Class 2 Remote-Control Circuits
16 sections →
Chapter 44
Referenced Standards
1 section →
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