California Climate Investments: Lessons for Washington State Homeowners

A Decade of California Climate Investments

California's cap-and-trade program, launched in 2013, has generated billions in revenue that flows into California Climate Investments (CCI) — a portfolio of programs tackling greenhouse gas emissions, air quality, and community resilience. According to the Environmental Defense Fund and state analyses, CCI has raised more than $9 billion for implementation, with well over two-thirds of that spending directed to projects that benefit disadvantaged and low-income communities.

For homeowners, California Climate Investments have funded:

• Rooftop solar and battery storage in low-income single-family homes.
• Weatherization and energy efficiency retrofits.
• Electric vehicle rebates and home charging installations.
• Urban tree planting and green spaces to reduce urban heat.
• Wildfire resilience and forest health projects.

Washington Passes the Climate Commitment Act

In 2021, Washington state passed the Climate Commitment Act (CCA), which established its own cap-and-invest program — the second economy-wide carbon market in the United States after California. Washington's program went live in 2023 and quickly began generating substantial revenue through quarterly auctions.

Washington's program borrowed key structural features from California's:

• Declining annual emissions caps that tighten over time.
• Auctioned allowances that large emitters must purchase.
• Revenue dedicated to climate programs.
• Requirements that a substantial share of investments benefit overburdened communities.

Key Lessons Washington Applied from California

Washington's lawmakers explicitly drew on more than a decade of California experience in designing the CCA:

• Environmental justice focus. California's struggles to ensure cap-and-trade revenue reached frontline communities led Washington to hardwire a 35% minimum of investments to projects benefiting marginalized groups.
• Program administration. Washington built on California's regulatory design while streamlining some reporting and enforcement mechanisms.
• Durable funding. Observing California's ongoing legislative debates over extensions, Washington structured its program with longer time horizons to give businesses and program administrators planning certainty.

Market Linkage on the Horizon

In November 2023, Washington's Department of Ecology director announced a preliminary decision to pursue linking Washington's carbon market with the joint California-Quebec market. On March 20, 2024, the three governments formally expressed mutual interest in forming a shared carbon market.

If completed, linkage could:

• Deepen the pool of allowances and smooth price volatility.
• Allow businesses to trade allowances across borders.
• Create a larger, more resilient North American carbon market.

What It Means for Homeowners

Homeowners in both California and Washington can tap into programs funded in whole or in part by cap-and-invest revenues, including:

• California programs such as the Low-Income Weatherization Program, Solar on Multifamily Affordable Housing (SOMAH), and California Clean Vehicle Rebate Project.
• Washington programs funded through the Climate Commitment Act, including HopeSource solar for low-income households, heat pump incentives, electric panel upgrades, and transportation-related rebates.

Because cap-and-invest revenues are tied to auction results, available funding can fluctuate with allowance prices. Homeowners should monitor state agency websites — California's CCI tracker and Washington's Department of Commerce program pages — for the latest eligibility and application details.

Jobs and Economic Impact

Research consistently shows that climate investments generate meaningful employment. Studies cited by Environmental Defense Fund and California's Greenlining Institute estimate that every $1 million spent in California Climate Investments supports roughly 8.8 jobs in the state — substantially more than equivalent spending in oil and gas sectors.

Outlook

With California's cap-and-invest program extended through 2045 and Washington's CCA continuing to raise major auction revenue, both states have a long-term policy anchor for climate investments. For homeowners, the policy stability means the energy efficiency, solar, and resilience programs funded by these markets are likely to remain available — and potentially expand — in coming years.