As jurisdictions across the country adopt more stringent energy codes, project teams are discovering that energy code compliance is no longer just a permit requirement. It is a critical design and business decision that can influence project cost, schedule, building performance, and long-term flexibility.
For many commercial buildings, the most expensive energy code decision is not related to mechanical systems, glazing percentages, or renewable energy requirements. It is deciding too late how the project will demonstrate compliance.
With the adoption of IECC 2024 accelerating, early energy modeling has become one of the most valuable tools available to owners, architects, and engineers. It allows project teams to understand compliance options, evaluate design tradeoffs, and make informed decisions before major project commitments are made.
Why Early Energy Modeling Matters More Under IECC 2024
Energy codes have evolved significantly over the past decade. What was once a relatively straightforward compliance exercise now involves increasingly complex requirements related to controls, metering, envelope performance, commissioning, and renewable energy systems.
As a result, energy modeling is moving upstream in the design process.
Rather than serving as a final verification step, energy modeling is increasingly being used during early design to evaluate options and identify the most practical path to compliance. This proactive approach helps project teams avoid discovering compliance challenges after key architectural and engineering decisions have already been finalized.
The earlier teams understand their compliance options, the greater their ability to balance sustainability goals, building performance, budget considerations, and project timelines.
Energy Code Compliance Is a Strategy Decision
Many project teams still view energy code compliance as a technical exercise that can be addressed later in the design process.
Increasingly, that assumption creates risk.
Once a project advances through schematic design and design development, major decisions related to the building envelope, glazing, HVAC systems, controls, and electrical infrastructure have often been established. If those decisions are not aligned with the selected compliance pathway, redesign and additional coordination may become necessary.
Successful projects recognize that energy code compliance is not simply an engineering task. It is a strategic decision that affects nearly every member of the design and construction team.
IECC 2024 vs. ASHRAE 90.1: The Importance of Choosing Early
As projects evaluate performance-based energy code compliance, many teams compare IECC 2024 with ASHRAE 90.1-2022 Chapter 12, commonly known as the Energy Cost Budget Method.
Each approach offers distinct advantages depending on project goals, jurisdictional requirements, and design priorities.
IECC 2024 may be attractive for projects operating in jurisdictions where code reviewers are most familiar with IECC documentation. In other situations, ASHRAE 90.1 may offer additional design flexibility through performance-based compliance methods.
The issue is not determining which framework is universally better.
The real challenge is making the selection early enough to inform project decisions. Once a compliance pathway is chosen, the project should be designed and documented consistently with that framework. Changing direction later can increase costs, create unnecessary complexity, and extend project schedules.
What Building Owners Need to Know About IECC 2024 Compliance
Owners often assume energy code compliance is handled entirely by the design team. However, the chosen compliance strategy can have meaningful impacts on project budgets and long-term operations.
For example, certain compliance pathways may influence decisions regarding renewable energy systems, metering requirements, testing protocols, and controls infrastructure. These decisions can affect both first cost and operational considerations throughout the life of the building.
When energy modeling is performed early, owners gain valuable insight into how different design approaches may impact project objectives. Instead of reacting to code requirements late in design, they can make informed decisions based on realistic performance expectations and project priorities.
That visibility helps reduce uncertainty and supports stronger decision making from project inception through construction.
Using Energy Modeling to Preserve Design Flexibility
One of the greatest benefits of early energy modeling is flexibility.
When modeling is integrated into the early stages of design, teams can evaluate multiple options while changes remain relatively easy and cost effective to implement.
Projects with extensive glazing, ambitious sustainability goals, unique building programs, or performance targets can especially benefit from understanding how design choices affect energy code compliance before those choices become locked into the project.
Rather than asking whether a building complies after the design is complete, teams can use modeling to identify the most effective path forward from the beginning.
A Smarter Approach to Building Performance
The most successful projects increasingly view energy modeling as more than a compliance requirement.
It is a decision-making tool.
By evaluating compliance pathways early, project teams can better understand risk, identify opportunities, support sustainability objectives, and avoid costly surprises later in the design process.
As IECC 2024 adoption continues to expand, organizations that make these decisions early will be better positioned to achieve compliance while maintaining control over project cost, schedule, and performance outcomes.
The most expensive energy code decision is often the one that is delayed.
Partner with The Epsten Group Early
Whether your project is evaluating IECC 2024 compliance, ASHRAE 90.1 performance pathways, LEED certification goals, or broader building performance objectives, early energy modeling can provide the insight needed to make informed decisions.
The Epsten Group works with owners, architects, and engineering teams to develop practical compliance strategies that support both project goals and long-term performance.
Contact our team to discuss how early energy modeling can help your next project achieve compliance while preserving flexibility and controlling costs.
