Codes to Cleaner Buildings

This research paper by the Climate Policy Initiative (CPI) evaluates the effectiveness of residential building energy codes in the United States from 1986 to 2008. Using econometric analysis of state-level energy consumption data, the study finds that building energy codes are associated with a reduction in primary energy use and greenhouse gas emissions per household, while also influencing fuel choice by shifting consumption toward natural gas and away from other fuels like fuel oil.

• Building energy codes are associated with a decrease in primary energy consumption per housing unit of approximately 10% compared to households built without these codes. In 2008, this resulted in an estimated total reduction of residential primary energy consumption by 1.3%.
• The implementation of building energy codes has led to a shift in fuel usage, specifically increasing the share of energy derived from natural gas and decreasing the use of "other" fuels, most notably fuel oil. This is attributed to code provisions that encourage the use of electric heat pumps and high-efficiency gas units.
• The combined effect of reduced energy consumption and the shift toward natural gas has resulted in a reduction of greenhouse gas emissions from an average code household of about 16%. In aggregate, building codes reduced 2008 residential building emissions by approximately 1.8%, or 52 million tonnes of CO2-equivalent.
• The study's empirical results suggest that standard engineering estimates of energy savings are reasonable and may even be lower than actual realized savings. For example, while engineering estimates suggested a 5% reduction in energy consumption for a typical home, the study's Model 1 suggested 11% and Model 2 suggested 10%.
• The research identifies a potential long-term policy risk regarding the "performance pathway" for code compliance. This pathway allowed tradeoffs where installing high-efficiency heating or water heating units could reduce requirements for the building envelope. Because envelopes are more permanent than mechanical units, these buildings may become less efficient once the original high-efficiency units are replaced.

APA

Deason, J., & Hobbs, A. (2011). Codes to Cleaner Buildings. Climate Policy Initiative. https://www.climatepolicyinitiative.org/wp-content/uploads/2011/12/Codes-to-Cleaner-Buildings-Effectiveness-of-US-Building-Energy-Codes.pdf

Chicago

Deason, Jeff, and Andrew Hobbs. Codes to Cleaner Buildings. Climate Policy Initiative, 2011. https://www.climatepolicyinitiative.org/wp-content/uploads/2011/12/Codes-to-Cleaner-Buildings-Effectiveness-of-US-Building-Energy-Codes.pdf.

Wikipedia

{{cite report |last1=Deason |first1=Jeff |last2=Hobbs |first2=Andrew |title=Codes to Cleaner Buildings |publisher=Climate Policy Initiative |date=September 2011 |url=https://www.climatepolicyinitiative.org/wp-content/uploads/2011/12/Codes-to-Cleaner-Buildings-Effectiveness-of-US-Building-Energy-Codes.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{deason2011codes, author = {Deason, Jeff and Hobbs, Andrew}, title = {{Codes to Cleaner Buildings}}, institution = {Climate Policy Initiative}, year = {2011}, month = sep, url = {https://www.climatepolicyinitiative.org/wp-content/uploads/2011/12/Codes-to-Cleaner-Buildings-Effectiveness-of-US-Building-Energy-Codes.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }