Why LA Is Zeroing In on Embodied Carbon
Worldwide the materials used to make buildings—steel, cement, glass, insulation—account for roughly 13 percent of annual CO₂ emissions (IPCC, 2023). Los Angeles signed C40’s Clean Construction Declaration in 2022 and now wants hard numbers in its own code to back that pledge. The City Council motion directs the Department of Building and Safety to propose embodied-carbon caps for all new construction and major additions over 50 000 ft² (City of Los Angeles, 2024).
CALGreen Sets the Floor, LA Wants a Ceiling
California’s CALGreen code began requiring embodied-carbon compliance on July 1 2024 for commercial projects larger than 100 000 ft² and K-12 schools over 50 000 ft² (CALGreen, 2024). Los Angeles will likely mirror CALGreen’s three compliance paths but sharpen the thresholds and lower size triggers to capture more mid-rise housing.
Three Ways to Show You Meet the New Limits
- Whole-building LCA: Document a 10 percent global-warming-potential reduction versus a reference design.
- Product-specific GWP targets: Each concrete mix, steel assembly, or insulation board falls below a published GWP number tied to regional averages.
- Weighted-average approach: Show the combined materials package beats the limit when tallied across the project.
Project teams may also reuse at least 45 percent of the primary structure to skip deeper calculations, a nod to circular-economy thinking (3C-REN, 2024).
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Concrete, Steel, and Glass Manufacturers: Your New Scorecard
Specifiers will scrutinize EPDs issued no earlier than 2019 and look for declared product averages, not generic industry PDFs. A ready-mix plant that swaps in 40 percent SCMs or a rebar mill that runs on renewable power can win bids if the numbers are transparent. Miss the paperwork and you are relegated to “default GWP” values that sit 25-30 percent higher than current market leaders—pricing you out before you even quote.
EPDs Become Table Stakes
Policy makers picked EPDs because they are audit-ready and already embedded in LEED v4 and Buy Clean California. An architect can plug a digital EPD into EC3 in seconds; a missing declaration takes hours of substitutions. That time penalty alone nudges even cost-sensitive GCs toward better-documented products.
Choosing a Partner Without Losing a Year
Most of the timeline pain hides in data wrangling: utility bills, plant yields, fleet fuel, upstream ingredients. Look for an LCA team that collects that data for you, keeps everyone on one platform, and knows which PCR your competitors use so you don’t recieve outlier results that hinder bids. Speed here is revenue, not convenience.
The Clock Is Ticking
LA’s code writers must report back before October 2025. Once the ordinance lands, owners will only approve materials with clear, current EPDs. Get yours in the queue now while labs and verifiers still have capacity.
