LEED v5 was launched in April 2025 and will become mandatory for all new projects seeking LEED certification starting July 1, 2026. While LEED v5 introduces many changes across categories, one of the most significant shifts is the increased emphasis on embodied carbon.

The most impactful change for structural engineers is that an embodied carbon assessment is now required for all LEED certification levels. At a minimum, projects must complete a cradle‑to‑gate (A1–A3) life‑cycle assessment (LCA). Under LEED v4, performing an LCA was optional and worth a point on its own. Under LEED v5, no points are awarded simply for completing an LCA. It’s now a baseline requirement. Under LEED v5, embodied carbon reductions contribute meaningfully to LEED scoring. Points are awarded based on the percent reduction in global warming potential (GWP) relative to a baseline “reference building” defined using ASCE’s Whole‑Building Life‑Cycle Assessment methodology:

2 points – Meets baseline

3 points – 10% reduction

4 points – 20% reduction (required for LEED Platinum)

5 points – 30% reduction

6 points – 40% or greater reduction

These changes to LEED are expected to push more project teams to adopt detailed LCA’s and proactive embodied carbon strategies, with an increased focus on structural systems and material selection. Preparing now will position us to better support our clients and remain competitive as embodied carbon becomes a central driver of sustainable design under LEED v5.

For more information, please reach out to the SEA-MW Sustainable Design Committee.