California's Assembly Bill 802, signed into law in 2015 and phased into enforcement over subsequent years, established one of the most comprehensive building energy benchmarking programs in the United States. For owners and operators of large commercial buildings, AB 802 isn't optional — it's a legal requirement with real consequences for non-compliance, and real opportunities for those who approach it strategically.
What AB 802 requires
AB 802 mandates that owners of commercial buildings over 50,000 square feet report annual energy usage data to the California Energy Commission (CEC) through the ENERGY STAR Portfolio Manager platform. Covered buildings are generally commercial buildings over 50,000 square feet with no residential utility accounts and multifamily buildings over 50,000 square feet with 17 or more utility accounts; some cities with their own ordinances are exempt from the state requirement.
The key requirements include:
- Annual benchmarking: Building owners must benchmark whole-building energy use annually using Portfolio Manager and report the data to the CEC by June 1 each year.
- Utility data access: AB 802 requires utilities to provide aggregated whole-building energy data to building owners upon request, making it easier to track performance without needing individual tenant meter data.
- Public disclosure: The CEC publishes energy performance data for covered buildings, creating transparency that influences property valuations, tenant decisions, and investor assessments.
Why it matters beyond compliance
Many building owners treat AB 802 as a reporting checkbox. That's a missed opportunity. The public disclosure component means your building's energy performance is visible to prospective tenants, investors, lenders, and the market at large. Buildings with poor energy performance scores face competitive disadvantages in leasing and valuation.
The valuation connection
Tenants, lenders and investors increasingly ask for energy performance data. How much a building’s energy performance affects its rents or value varies by market and asset, so we treat it as a question for your own leasing and valuation advisors rather than a fixed premium.
Conversely, buildings that score poorly face increasing pressure. Large institutional tenants — particularly technology companies, law firms, and financial services firms — now routinely request energy benchmarking data during lease negotiations. ESG-focused investors screen portfolios for energy performance. Lenders are beginning to factor energy efficiency into underwriting.
How on-site solar affects benchmarking metrics
Updated October 10, 2026. State reporting does not require an ENERGY STAR score, and AB 802 is a reporting and disclosure program rather than a solar or performance mandate. Portfolio Manager reports several different metrics, and solar affects them differently. Site energy counts all energy the building consumes, including solar used on site. Source energy, which drives the 1–100 ENERGY STAR score, applies conversion factors: ENERGY STAR assigns on-site renewable electricity a factor of 1.0 versus 2.80 for grid electricity, so solar used in the building lowers source energy use intensity and can raise the score. Purchased (grid) energy falls by the amount of solar used on site.
How much any of this moves depends on the building’s loads, the system size and how much production is used on site, so we don’t promise a particular score change. A score of 75 or higher makes a building eligible to apply for ENERGY STAR certification, which requires verification; it is not automatic.
Battery storage mainly changes when energy is drawn from the grid and the building’s demand peaks; any effect on reported annual energy metrics is usually small and should be modeled rather than assumed.
Sources: CEC Building Energy Benchmarking Program; ENERGY STAR: how renewable energy is accounted for.
Local benchmarking ordinances
Several California cities have enacted their own building performance ordinances that go beyond AB 802's state requirements:
- San Francisco (Environment Code Chapter 20): Requires annual benchmarking for commercial buildings over 10,000 sq ft — a much lower threshold than the state law. Also requires energy audits every 5 years.
- Los Angeles (EBEWE): The Existing Buildings Energy & Water Efficiency program requires benchmarking and retrofit measures for buildings over 20,000 sq ft.
- San Jose (Building Reach Code): Requires new and major-renovation commercial buildings to be all-electric, with solar and storage provisions.
- Berkeley (BESO): The Building Energy Saving Ordinance requires energy assessments for commercial buildings at time of sale.
If your building is in a jurisdiction with local ordinances, you may face different reporting requirements, lower size thresholds, or required audits or improvements — check the current ordinance, as these change. In many cases, solar and storage installations help satisfy both state and local requirements simultaneously.
Penalties and enforcement
Non-compliance with AB 802 can result in penalties administered by the CEC, including fines and public listing of non-compliant buildings. Local ordinances may carry additional penalties. But the real cost of non-compliance is often reputational and financial — a building without benchmarking data, or with poor performance scores, faces disadvantages in an increasingly performance-conscious market.
A strategic approach to compliance
Rather than treating AB 802 as a burden, forward-thinking building owners use it as a catalyst for improvements that pay for themselves. The benchmarking process identifies where energy is being wasted. Solar and storage investments reduce that waste while generating returns. Improved scores attract better tenants and higher valuations.
The smartest building owners we work with don't just comply with AB 802 — they use it as a competitive advantage. They benchmark, identify opportunities, invest in solar and storage, and then point to their improved scores in marketing materials and lease negotiations.
If you own or manage a commercial building over 50,000 square feet in California — or over 10,000 square feet in San Francisco — and haven't yet looked at how solar and storage could affect your reported energy metrics, the economics deserve a close look. The compliance obligation already exists. The question is whether you're meeting it in a way that also improves your bottom line.