California Title 24 Energy Compliance - building energy modeling

Navigating California’s Energy Code with Strategy, Precision, and Design Insight

California’s Title 24, Part 6 energy code is among the most rigorous in the nation, designed to push buildings toward energy efficiency and decarbonization. Yet meeting its requirements can be complex, especially for projects pursuing electrification, dealing with partial scopes, or juggling cost and system tradeoffs.

At A2 Efficiency, we provide technical, strategic, and hands-on support for Title 24 compliance, helping teams navigate the code from early design through permit submission. Whether you need a code strategy before systems are locked in or full documentation at the end of design, our services are designed to meet your team where you are.

Our Approach

We don’t just deliver documentation—we guide better decisions. Our team brings together building systems expertise, policy fluency, and modeling depth to help clients:

  • Identify the most effective path to compliance

  • Evaluate energy performance and design tradeoffs

  • Streamline permitting and minimize redesign risk

  • Engage authorities having jurisdiction (AHJs) with clarity and confidence

Modular Service Options

Each of our services can be scoped independently or combined for full-project support.

Code Strategy Review

Best for: Concept or schematic design

  • Determine best-fit compliance pathway (prescriptive, performance, hybrid)

  • Identify risks and design elements that impact compliance

  • Clarify system assumptions and required design inputs

  • Deliverable: Code strategy memo with recommendations and modeling approach

Preliminary Code Evaluation

Best for: Design development or value engineering

  • Estimate energy performance and compliance margin

  • Evaluate preliminary HVAC, envelope, lighting, and DHW selections

  • Support VE studies and electrification tradeoffs

  • Deliverable: Summary memo with results, risk areas, and code feedback

Permit Compliance Package

Best for: Final design and documentation

  • Create full CBECC model for code submission

  • Generate and sign NRCC compliance forms

  • Provide responses to AHJ questions

  • Deliverables: Signed documentation, model files, AHJ support memos

Service Tier

Envelope-Only Compliance - NRCC-ENV forms for core/shell, additions, and façade changes

Envelope + Lighting - Add NRCC-LTI/LTO for interior and exterior lighting

Whole-Building Compliance - Full scope: envelope, lighting, HVAC, DHW, controls

Compliance + Design Evaluation - Compliance modeling plus early-phase feedback and energy strategy

Mechanical Plan Add-On - Review of MEP drawings, control logic, and custom inputs (optional)

Scoping the Service to Match the Need

We support a wide range of project types and scopes. Common engagement tiers include:

Representative Projects

Why A2 Efficiency?

We understand both the code and the complexity of design.

  • We work with top-tier architects, engineers, and developers across California

  • We’ve worked on all-electric campuses, lab-classroom hybrids, high-glass envelopes, and non-standard systems.

  • We bring a proactive, strategic lens—helping you meet code without compromising design intent