§ Chapter 1 IRC 2021
Scope and Administration
10 entries from Chapter 1 of IRC 2021, organized by section number. Each entry covers what the code requires, why it exists, what inspectors look for, and common mistakes.
§ 01 Sections
All 10 entries.
Sorted by section number. Click any row for the full entry — answer, requirements, edition diff, related sections.
Section
Title
Question
R101.2
The IRC Applies to One- and Two-Family Dwellings and Townhouses Within Its Scope
R101.2
Does the IRC apply to my single-family house, duplex, townhouse, or small residential project?
Does the IRC apply to my single-family house, duplex, townhouse, or small residential project?
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R102.7
Existing Residential Buildings Are Not Automatically Required to Meet Every New IRC Rule
R102.7
Does an older house have to be brought up to the current IRC when I remodel or repair it?
Does an older house have to be brought up to the current IRC when I remodel or repair it?
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R104.1
The Building Official Interprets and Enforces the Adopted Residential Code
R104.1
Who has the final say on building code interpretation, the inspector, plan reviewer, or building official?
Who has the final say on building code interpretation, the inspector, plan reviewer, or building official?
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R105.1
Permits Are Required Before Residential Work Unless the Code or AHJ Exempts It
R105.1
Do I need a building permit for a remodel, addition, basement finish, or structural repair?
Do I need a building permit for a remodel, addition, basement finish, or structural repair?
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R105.2
Permit-Exempt Work Still Has to Comply With the Residential Code
R105.2
What residential work is exempt from a building permit under the IRC?
What residential work is exempt from a building permit under the IRC?
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R106.1
Residential Permit Applications Need Enough Documents for Code Review
R106.1
What drawings, plans, or documents do I need for a residential building permit?
What drawings, plans, or documents do I need for a residential building permit?
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R109.1
Residential Work Must Be Inspected at Required Stages Before It Is Covered
R109.1
What inspections are required for a residential permit, and when do I call for them?
What inspections are required for a residential permit, and when do I call for them?
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R110.1
A Dwelling Cannot Be Occupied Until Required Approval or Certificate Is Issued
R110.1
Do I need a certificate of occupancy before moving into a new house, addition, or converted space?
Do I need a certificate of occupancy before moving into a new house, addition, or converted space?
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R112.1
Residential Code Decisions Can Be Appealed Through the Local Board of Appeals
R112.1
Can I appeal a building inspector or building official decision under the IRC?
Can I appeal a building inspector or building official decision under the IRC?
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R113.1
Unpermitted or Noncompliant Residential Work Can Trigger Violations and Stop-Work Orders
R113.1
What happens if residential work is done without a permit or violates the IRC?
What happens if residential work is done without a permit or violates the IRC?
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