California is not waiting on the federal government. The state’s 2022 Scoping Plan targets carbon neutrality by 2045. Specifically, it aims to cut statewide greenhouse gas emissions at least 85% below 1990 levels. For commercial construction, that target is already showing up in permit applications today. It’s in material specifications. It’s in mechanical system decisions on projects being designed right now.
California’s homes and commercial buildings account for 55% of the state’s natural gas consumption. On-site combustion in buildings contributes roughly 10% of statewide greenhouse gas emissions. Consequently, the building sector is one of the state’s primary decarbonization targets — and the regulatory pressure reflects that.
Substrata Construction tracks these requirements closely. Understanding what California climate goals demand at the construction level is core to delivering commercial projects that pass inspection and hold long-term value.
CALGreen Updates: What’s Changing in the Green Building Code
Green building code (CALGreen) is California’s mandatory green building standards code. It’s also the first of its kind in the United States. Furthermore, it keeps expanding in scope.
The most significant recent update addresses embodied carbon directly in the code. California became the first state to make embodied carbon emission control mandatory in the building code. Requirements took effect July 1, 2024, applying to commercial buildings over 100,000 square feet. Moreover, on January 1, 2026, that threshold dropped to 50,000 square feet. A far broader range of commercial projects now face mandatory compliance.
Three compliance pathways exist under the updated green building code (CALGreen):
- Building Reuse — reuse at least 45% of an existing structure and exterior
- Prescriptive — specify materials with documented Environmental Product Declarations meeting global warming potential thresholds
- Performance — conduct a cradle-to-grave Whole Building Life Cycle Assessment demonstrating a 10% or greater embodied carbon reduction compared to a reference building.
The direction is clear. The plan is to continue reducing the threshold as we approach 2030. Buildings at multiple scales will eventually be required to comply. Embodied carbon tracking is becoming standard — not an exception.
Embodied Carbon: The New Frontier in Sustainable Construction
Operational carbon has been the focus of energy codes for decades. Embodied carbon is different. It refers to emissions from materials and construction activity — including extraction, production, transport, and manufacturing.
This matters specifically for net zero commercial buildings. Studies show that even high-performing new buildings can take 20 to 80 years to recoup the embodied carbon impacts of their original construction through operational savings. Therefore, a building optimized for energy efficiency can still carry a substantial carbon debt from its materials alone.
Buildings are responsible for roughly 37% of global greenhouse gas emissions. That figure includes direct emissions, electricity demand, and embodied carbon. As a result, CARB has set a target of a 40% net reduction in building material greenhouse gas emissions by 2035. A reporting framework is expected in place by 2026.
For construction teams, material selection is no longer just a cost decision. It’s a compliance decision with documentation requirements attached.
Electrification: Moving Away from Natural Gas in Commercial Buildings
The electrification timeline is accelerating. Starting January 1, 2026, California’s updated energy code requires heat pumps for most space and water heating in new construction. Additionally, electrification requirements begin extending to commercial buildings by 2029.
At the local level, Los Angeles has moved further. The LA natural gas ban requires new constructions — both residential and commercial — to be designed as zero-emission buildings. Combustion appliances for cooking, space heating, or water heating are no longer permitted.
The practical implications for net zero commercial buildings in LA are significant:
- Electrical panels must be sized for all-electric mechanical systems from the outset
- HVAC design shifts from gas-fired systems to heat pump technology
- Kitchen and food service spaces require induction or electric cooking infrastructure
- A zero-NOx requirement for commercial furnaces takes effect January 1, 2029. Larger commercial water heater requirements follow in 2031.
Retrofitting gas infrastructure out of a completed building is expensive. Getting electrical infrastructure right at the construction stage is the only cost-effective path forward.
How Substrata Stays Ahead: Partnering With Clients to Meet and Exceed Standards
Meeting California climate goals requires more than compliance awareness. It requires integrating code requirements early — before design decisions become expensive to reverse.
Substrata Construction approaches green building code (CALGreen) compliance as a planning discipline. It is not a late-stage checklist. Specifically, that means:
- Engaging embodied carbon requirements at the material specification stage
- Coordinating electrification infrastructure with structural and MEP design from project inception
- Tracking net zero commercial buildings standards across permit jurisdictions that may exceed state minimums
- Advising clients on compliance pathways that balance cost, schedule, and long-term asset performance
The regulatory environment around California climate goals will keep tightening. Clients who build with those requirements baked in avoid the retrofit costs their competitors will face later.
Turning Regulatory Requirements Into Competitive Advantages
California climate goals are not slowing down. The updated energy standards are projected to save approximately $5 billion in energy costs. They’re also expected to cut four million metric tons of carbon emissions over three years. Buildings that meet or exceed current thresholds are better positioned for tenant demand, financing, and long-term asset value.
The commercial developers winning in this environment are not treating green building code (CALGreen) and embodied carbon mandates as compliance burdens. Instead, they’re treating them as design inputs. They’re building to a standard that won’t require correction when the next code cycle arrives.
Substrata Construction brings that forward-looking approach to every project. Understanding California’s regulatory direction — and building to meet tomorrow’s standard, not just today’s minimum — is what separates projects that hold value from those that don’t.
Ready to build a commercial project that meets California’s evolving standards? Contact Substrata to discuss how our approach to green building code (CALGreen) compliance and net zero commercial buildings delivers projects built for long-term performance.
