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Smaller, less complex projects aren’t required to have an energy model in hopes of making LEED v5 more accessible. Teams may use prototype models that are specific to the project application. Teams can also use other models for large-scale analysis, such as the publicly available prototype models used to inform ASHRAE energy code development. Another solution would be using data from previous, similar projects. Comparing the project’s design to projects of similar size, use, site, and climate zone can provide teams with a target or benchmark for developing a high-performing building.

Site Energy Estimate

Along with the initial design analysis, teams must estimate t he project’s annual site energy use from each energy source and submit this information to USGBC, which will use the data to create the BAU carbon projection — a fundamental part of this credit.

For teams developing an energy model for EAp2: Minimum Energy Efficiency or a simplified energy model, generate the required data from the simulation results. For teams that use similar projects or published data, establish estimates based on the predicted design conditions, including any designed optimization strategies.

Review Carbon Projection

USGBC provides all LEED BD+C: New Construction projects with a BAU projection of the project’s operational carbon emissions over the next 25 years based on the site energy data provided and the project’s current grid emissions factor. This BAU projection assumes that the grid emissions factor starts with the latest national or regional coefficient — such as the subregional eGRID coefficients in the U.S. — and declines in a straight line by 95% over the next 25 years. This step reflects the overall direction of global grid decarbonization and isn’t an exact prediction of individual project performance.

The projection should educate owners and designers on the carbon impacts of their design decisions over the next 25 years. Owners must review the data and attest to the review.

Building performance standards Depending on the project location, it may be subject to a building performance standard (BPS). These standards are carbon-based or EUI-based performance requirements that many U.S. cities and states have adopted. Typically, BPSs set caps on energy use or carbon emissions that decline over time. The project must meet those caps or face fees.

U.S. Green Building Council LEED v5 Reference Guide for Building Design and Construction, April 2025 Launch Edition 205