Following the State Environmental Policy Act process, Mayor Jenny A. Durkan announced that she has transmitted to City Council the proposed update to the energy code that would further electrify buildings using clean energy and restrict fossil fuels for most building use. By updating its energy code, the City will restrict the use of fossil fuels in new commercial and large multi-family construction for space and most water heating in order to cut down on the significant emissions contributed by the building sector. Space and water heating account for most building gas use according to City and national data.
“2020 and 2021 will be remembered as years of crises, as we recover, Seattle can create a more equitable city with green buildings. It is up to Seattle and other cities to make the bold changes necessary to lower our greenhouse gas emissions,” said Mayor Durkan. “Business as usual will not get us to a future where all Seattle residents, especially our Black, Indigenous and people of color neighbors who are unfairly burdened by environmental inequities, enjoy a healthy and prosperous future. Electrifying our buildings is an important step in the many actions needed to curb climate pollution.”
The proposed Seattle Energy Code update includes the following key changes for commercial and large multifamily buildings:
- Eliminates all gas and most electric resistance space heating systems
- Eliminates gas water heating in large multifamily buildings and hotels
- Improves building exteriors to improve energy efficiency and comfort
- Creates more opportunities for solar power
- Requires electrical infrastructure necessary for future conversion of any gas appliances in multifamily buildings
In 2019, Mayor Durkan issued anExecutive Order committing the City to new actions that will support the goals of Seattle’s Green New Deal. In addition to requiring that all new or substantially altered City of Seattle buildings operate without fossil fuels, City departments will work with the Office of Sustainability & Environment to develop a strategy to eliminate fossil fuel use in existing City buildings, improve data collection and sharing on Seattle’s climate emissions, and engage stakeholders like the philanthropic community, business community, labor community, non-governmental organizations, health care community, county and state agencies, state legislators, and tribes to achieve the goals of the Green New Deal.
The proposed energy code amendments will eliminate most direct carbon emissions from new commercial and multifamily buildings. Requiring these changes at construction is the most economical opportunity to transition to clean electricity. Without the proposed code changes, the City expects that greenhouse gas emissions from buildings to be at least 12% higher by 2050.
Since 2017, the City has also helped approximately 600 households convert from dirty, inefficient heating oil to clean, energy-efficient heat pumps. The City will convert more households to electric heat with the goal of eliminating heating oil use by 2028.
The City also requires Building Tune-Ups to help building owners identify ways to reduce energy and water costs. Through tune-ups, building owners find operational efficiencies and low- and no-cost fixes that improve building performance and can reduce building emissions 10-15% on average. Seattle’s largest buildings have completed 450 tune-ups to date, reducing greenhouse gas emissions across the city and saving money on their energy bills.
The Seattle Energy Code impacts new construction and substantial alterations of commercial and 4+ story tall multi-family buildings. The proposed code changes were recommended for approval late last year by Seattle’s Construction Codes Advisory Board (CCAB), an advisory body tasked with reviewing changes to technical codes for construction.
The City of Seattle is receiving technical support in developing the energy code from the Bloomberg Philanthropies American Cities Climate Challenge. Seattle is one of 25 cities participating in the Climate Challenge, a program to significantly deepen and accelerate their efforts to tackle climate change and promote a sustainable future for their residents.
With City Council approval, code updates will become effective in the spring of 2021, along with the full suite of Seattle building code changes in line with the statewide building code updates. For more information about the proposed energy code updates, including the proposed code language, visit the Seattle Department of Construction and Inspections energy code web page.
Last modified: February 1, 2021