The 2020 Residential Code of New York State (RCNYS) is a robust and prescriptive code designed to regulate the construction of residential buildings such as: 

• Single-family homes
• Two-family dwellings (Duplexes)
• Townhouses (up to three stories above grade)

It’s based on the 2018 International Residential Code but tailored specifically for New York State, making it easier for builders and inspectors to navigate without wading through irrelevant commercial provisions. Coverage includes:

1. Structural Components
2. Fireplaces and Chimneys
3. Thermal Insulation
4. Mechanical Systems
5. Fuel Gas Systems
6. Plumbing Systems
7. Special Topics

The 2020 Residential Code of New York State (RCNYS) is a comprehensive set of regulations designed to ensure safe, efficient, and modern residential construction across the state. Its practical applications span every stage of building—from design to final inspection—and affect a wide range of professionals including architects, builders, inspectors, and homeowners. 

1. Design & Planning
2. Construction Standards
3. Mechanical, Electrical & Plumbing (MEP) Systems
4. Code Compliance & Inspections
5. Renovations & Additions
6. Energy & Environmental Considerations

Licensing Exam Preparation: This code is a customized version of the 2018 International Residential Code (IRC), adapted specifically for New York State. It governs:

• Construction standards for one- and two-family dwellings and townhouses
• Structural design, building materials, and safety features
• Energy efficiency, plumbing, mechanical, and electrical systems

The 2020 Residential Code of New York State (RCNYS) is designed with several visual and organizational tools to make navigation and application easier for builders, inspectors, and designers.

Organizational Structure

Eight Main Parts: The code is divided into eight major sections that follow the natural progression of residential construction—from administration and definitions to structural systems and energy efficiency.

Chapter-Based Layout: Each chapter focuses on a specific aspect of residential construction, such as:

• Foundations
• Wall and roof construction
• Mechanical, plumbing, and electrical systems
• Fireplaces and chimneys
• Energy conservation
• Special topics like solar energy and radon control

Visual Tools & Navigation Aide

• Prescriptive Format: Most provisions are laid out in a step-by-step format, making it easier to follow for standard residential projects.
• Tables and Figures: The code includes numerous tables, diagrams, and illustrations to clarify technical requirements—especially for dimensions, load calculations, and system layouts.
• Cross-References: It links to other relevant codes (like the Building Code or Energy Code) when specialized or non-standard practices are involved.
• Digital Access: Through platforms like ICC Digital Codes, users can search, bookmark, and print specific sections, enhancing usability for professionals working on-site or remotely.