Summary
Details
- Seattle
The Seattle BEPS applies to existing non-residential and multifamily buildings larger than 20,000 square feet within the City of Seattle.
Compliance deadlines are phased according to building size, with the largest buildings beginning compliance in 2027 and the smallest covered buildings by 2030. Certain affordable housing and specialized building types are subject to modified requirements or alternative compliance provisions.
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Background
Buildings are responsible for around 40% of Seattle's greenhouse gas emissions, with most emissions resulting from the combustion of fossil fuels for space and water heating. To address this, the Seattle City Council adopted the Building Emissions Performance Standard (SMC 22.925) in 2023 as a key component of the city's climate strategy.
BEPS establishes building-specific greenhouse gas intensity (GHGI) targets that become progressively more stringent over successive five-year compliance intervals. Building owners remain free to choose how they achieve these targets, whether through electrification, energy efficiency improvements, operational changes, or other emissions reduction measures. The policy is expected to reduce emissions from Seattle's building sector by approximately 27% by 2050, while ultimately requiring covered buildings to reach net-zero operational emissions between 2041 and 2050, depending on building type.
Unlike the Washington Clean Buildings Performance Standard (CBPS), which is a statewide energy performance regulation based primarily on Energy Use Intensity (EUI), Seattle BEPS is a city-level emissions standard based on greenhouse gas intensity. The two programs operate independently, have different administering authorities, compliance pathways, reporting requirements, and performance metrics, meaning compliance with one does not automatically satisfy the other.
Reporting and Compliance Requirements
Compliance under BEPS begins several years before buildings are required to meet their first emissions target. Building owners must demonstrate how their buildings will achieve future greenhouse gas intensity requirements through verified reporting and planning. Covered building owners are expected to:
Maintain annual energy benchmarking using ENERGY STAR Portfolio Manager and ensure building energy data remains accurate.
Obtain Benchmarking Verification from a Qualified Person before the building's first compliance deadline.
Submit a Greenhouse Gas (GHG) Report, documenting the building's emissions, applicable GHGI target, and planned pathway to compliance.
Meet the applicable GHGI target for each five-year compliance interval or use an approved alternative compliance pathway where eligible.
Penalties for Non-Compliance
Seattle has established a structured enforcement regime under SMC 22.925. Building owners that fail to submit required reports, provide inaccurate information, or fail to meet applicable emissions targets may face significant financial penalties. Owners who fail to submit a required report or submit inaccurate reporting may be fined up to US$15,000 for buildings larger than 50,000 square feet, or up to US$7,500 for smaller covered buildings. Buildings that fail to achieve their required greenhouse gas intensity target may be assessed penalties of up to US$10 per square foot for non-residential buildings, US$7.50 per square foot for multifamily buildings, and US$2.50 per square foot for affordable housing.
Current Status and Outlook
Seattle is currently in the implementation phase of BEPS. Initial compliance activities—including benchmarking verification and submission of greenhouse gas reports—begin between 2027 and 2030, depending on building size, while the first emissions compliance deadlines begin between 2031 and 2035. The City finalized its first Director's Rule in 2025, providing detailed guidance on reporting, compliance documentation, and alternative compliance pathways.
Alongside the regulatory framework, Seattle has expanded implementation support for building owners. Through the Building Emissions Navigator, the Office of Sustainability & Environment offers free technical assistance, coaching, and compliance resources. The City has also launched Building Decarbonization Grants, providing funding for engineering design and capital retrofit projects that help eligible buildings reduce greenhouse gas emissions ahead of their BEPS compliance deadlines.
As building owners prepare for these milestones, BEPS is expected to become one of the most ambitious municipal building decarbonization programs in North America. Together with ongoing benchmarking requirements and complementary state-wide initiatives such as Washington's CPBS, it forms a central part of Seattle's strategy to transition existing buildings away from fossil fuels and toward net-zero emissions.
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