Berkeley Building Emissions Saving Ordinance (BESO): Compliance Guide For Building Owners
A comprehensive guide to understanding Berkeley’s energy efficiency and emissions reduction requirements for commercial and multifamily buildings.
Understanding Berkeley’s Building Performance Standards
Berkeley is one of the cities leading the charge on energy efficiency and carbon reduction through its Building Emissions Saving Ordinance (BESO). Designed to reduce greenhouse gas emissions from buildings, BESO requires commercial and multifamily property owners to assess and disclose their energy performance.
For businesses and property owners, understanding and complying with BESO is crucial to avoiding penalties while improving building efficiency and long-term cost savings. Compliance is not just about meeting legal requirements—it is an opportunity to make strategic improvements that enhance property value and reduce energy expenses.

Who Must Comply With BESO?
BESO applies to commercial and multifamily buildings that meet specific size and usage criteria. The ordinance mandates that property owners conduct periodic energy assessments and disclose performance data.
While exemptions may apply in certain cases, most properties must undergo an Energy Assessment before a sale or at specific compliance intervals. Understanding whether your building falls under BESO’s requirements is essential to ensuring timely compliance.
Key Compliance Requirements For Berkeley’s BESO
Berkeley’s BESO requires building owners to meet energy performance and transparency targets to align with the city’s climate goals. Key compliance elements include:
1. Energy Efficiency Assessments:
Buildings must undergo periodic audits conducted by a registered energy assessor to identify inefficiencies and recommend improvements.
2. Benchmarking & Reporting:
Owners must report energy performance data annually using ENERGY STAR® Portfolio Manager or other approved platforms.

3. Emissions Reduction Targets:
Larger buildings must implement strategies to lower carbon emissions and overall energy consumption.
4. Electrification & Renewable Energy:
Properties may be required to replace fossil fuel-based systems with electric alternatives or integrate on-site solar energy solutions.
5. Water Efficiency Measures:
Some properties must improve water efficiency by upgrading plumbing fixtures and implementing conservation measures.
Compliance Deadlines and Phases
Berkeley’s BESO follows a phased approach, with deadlines varying based on building size and classification. Property owners must comply within designated timeframes or when triggering events occur, such as:
1. Before A Property Sale:
Most commercial and multifamily properties must complete an energy assessment before a transaction is finalized.
2. Routine Compliance Deadlines:
Buildings above a certain size threshold must submit energy performance data at regular intervals.
3. Electrification & Emissions Deadlines:
Long-term targets may include requirements for replacing gas-powered equipment with electric alternatives.

How To Meet BESO Compliance Requirements
1. Conduct An Energy Assessment
An Energy Assessment is the first step toward compliance. A qualified energy assessor evaluates a building’s performance, identifying areas where improvements can be made. This process helps property owners understand their current energy consumption and develop a strategy to meet BESO requirements.
2. Implement Energy Efficiency Upgrades
Building owners can take actionable steps to improve efficiency, such as:
- Upgrading to energy-efficient HVAC systems.
- Installing LED lighting and smart controls.
- Enhancing building insulation and window performance.
- Automating lighting, heating, and cooling schedules
These improvements not only help meet compliance but also reduce long-term operational costs.
3. Submit Benchmarking Reports
Once energy assessments are complete, owners must report their building’s energy performance annually. This data helps the city track progress toward its carbon reduction goals. Property owners should ensure reports are submitted accurately and on time to avoid penalties.
4. Transition To Renewable Energy & Electrification
Berkeley’s long-term energy goals emphasize reducing fossil fuel dependency. To align with these goals, businesses should consider:
- Installing on-site solar panels to reduce grid reliance.
- Participating in community solar programs or purchasing renewable energy credits (RECs).
- Replacing gas heating and cooking equipment with electric alternatives.
Electrification not only ensures compliance but also future-proofs properties against rising energy costs and stricter regulations.
5. Utilize Demand Response & Energy Management Programs
Buildings can participate in demand response programs that help balance grid demand while reducing costs. Owners can also integrate energy management software to monitor and optimize building performance in real time.
Financial Incentives & Support For Compliance
Berkeley offers financial assistance to help property owners comply with BESO requirements, including:
1. Energy Efficiency Rebates:
Utility companies and state programs provide rebates for HVAC upgrades, insulation improvements, and lighting retrofits.
2. Solar & Electrification Incentives:
Funding is available for installing renewable energy systems and transitioning to electric appliances.
3. Low-Interest Financing:
The Property Assessed Clean Energy (PACE) program allows property owners to finance efficiency upgrades through property tax assessments.
Building owners should explore these incentives to reduce upfront costs and maximize long-term savings.

Why Compliance Matters For Businesses
Meeting BESO requirements is more than just a legal obligation it provides real financial and operational benefits for businesses:
1. Lower Utility Bills:
Energy-efficient buildings consume less electricity, reducing monthly costs.
2. Increased Property Value:
Buildings with high energy performance ratings attract more tenants and buyers.
3. Regulatory Compliance & Avoiding Penalties:
Non-compliant buildings may face fines, delayed sales, or additional reporting burdens.
4. Corporate Sustainability Goals:
Businesses that meet BESO standards demonstrate environmental responsibility, enhancing their brand reputation.
What Should Building Owners Do Next?
With compliance deadlines approaching, building owners should take immediate action to assess their energy performance and implement required upgrades.
The best first steps include:
- Confirming whether your property falls under BESO regulations.
- Scheduling an energy assessment with a qualified assessor.
- Reviewing recommended improvements and identifying financing options.
- Submitting required benchmarking reports to the city.
Staying ahead of the regulations ensures compliance while unlocking energy savings, improving building performance, and reducing long-term costs.