Title 24 Compliance vs. CalGreen Requirements – What You Need to Know
Call (626) 365-1518 | Alternative Energy Systems
If you’re planning a construction or remodeling project in California, you’ve likely heard of **Title 24** and **CalGreen**—but what’s the difference? Do you need to meet both? At Alternative Energy Systems (AES), we help clients understand and comply with both sets of standards to ensure smooth permitting and a code-compliant build from day one.
Title 24 Compliance vs. CalGreen Requirements: What’s the Difference?
**Title 24** refers to the California Building Energy Efficiency Standards, which regulate how much energy a building uses. It focuses on things like insulation, HVAC, windows, lighting, and solar readiness.
**CalGreen**, on the other hand, is California’s **Green Building Standards Code**. It addresses sustainable construction practices including water efficiency, indoor air quality, construction waste management, and low-emission materials.
While both are part of California’s overall building code, they serve different purposes and are enforced separately during plan review and inspection. Most projects must comply with **both**.
Your California Compliance Experts – Alternative Energy Systems
At AES, we’ve helped thousands of builders, homeowners, and developers navigate these overlapping requirements. Whether you’re building a new home, a commercial space, or an ADU, we’ll guide you through both Title 24 and CalGreen documentation—making sure everything is filed correctly and approved quickly.

Understand the Difference Between Title 24 and CalGreen
Call (626) 365-1518 | Alternative Energy Systems
What We Offer for Full Code Compliance
- Title 24 Reports and Energy Modeling
- Residential: Compliance reports for homes, ADUs, additions, and remodels.
- Commercial: Detailed energy modeling for new buildings and tenant improvements.
- CalGreen Checklist & Documentation
- Mandatory Measures: We verify you meet CalGreen’s basic environmental requirements.
- Tier 1 & Tier 2: We also help with enhanced green measures where required by local jurisdictions.
- Permit-Ready Submission Packages: We handle all forms, calculations, and reports needed to keep your project moving forward—no red tape, no rejections.
Client Testimonials
“We had no idea how different Title 24 and CalGreen were. AES made it all make sense and got our plans approved without a single delay.”
— Chris D., Custom Home Builder, California
Why California Builders Choose AES
- Expert Guidance: We explain the difference between codes and what you need to submit for each.
- One-Stop Solution: Title 24, CalGreen, HERS testing—we do it all.
- City-Approved Accuracy: Our documentation is trusted by local plan reviewers across California.

Title 24 and CalGreen Compliance Made Easy
Call (626) 365-1518 | Alternative Energy Systems
Start Your Code Compliance Process with AES Today
Need help understanding the difference between CalGreen and Title 24? AES is here to guide you from the first form to final inspection.
Contact Information
- Phone: 626.365.1518
- Email: info@title24energy.com
- Address: 145 South Glenoaks Blvd. #1009, Burbank, CA 91502
Visit https://title24energy.com/ or send a message to start your Title 24 and CalGreen compliance today.
California building codes are tough. AES makes it easy—with experience, speed, and the know-how to keep your project on track.
FAQ: Title 24 vs. CalGreen Requirements
- What is Title 24?
Title 24 is California’s Building Energy Efficiency Standards. It focuses on reducing energy use in buildings through insulation, HVAC, windows, and lighting. - What is CalGreen?
CalGreen is California’s Green Building Standards Code. It addresses environmental impact, water usage, construction materials, and air quality. - Do I need to comply with both?
Yes. Most residential and commercial projects in California are required to meet both Title 24 and CalGreen standards. - How are the two enforced?
Title 24 is typically reviewed by energy consultants and plan checkers. CalGreen is enforced during plan review and final inspection, often using a checklist. - What does CalGreen cover that Title 24 does not?
CalGreen includes water efficiency, low-VOC materials, construction waste recycling, and air quality measures—things outside energy calculations. - Can AES help with both?
Absolutely. We provide Title 24 reports and complete CalGreen checklists tailored to your specific city and project type. - What happens if I only comply with one?
Your project will be delayed or rejected during permitting or inspection. Full compliance with both codes is required for approval. - Are these codes statewide?
Yes, but some local jurisdictions may require stricter enforcement or additional measures beyond state minimums. - Do ADUs need to comply with both?
Yes. ADUs are treated as new dwelling units and must meet all applicable Title 24 and CalGreen requirements. - How fast can AES prepare both documents?
Most reports and checklists are delivered within 2–3 business days, fully formatted for city plan review.

