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Unlocking Alternative Energy Code Performance Pathways for Multifamily Buildings with Commercial Energy Modeling

June 12, 2026

Energy code compliance for multifamily building projects continues to increase in complexity. The 2021 and 2024 versions of the International Energy Conservation Code (IECC), now in effect in many states in the Mid-Atlantic and Northeast regions, contain new requirements that can significantly affect the design and budget of new multifamily buildings. To mitigate the impact…
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2026 Pennsylvania Energy Code Update: 2021 IECC Effective July 1

March 12, 2026

In October of 2025, the Pennsylvania Independent Regulatory Review Commission (IRRC) updated Pennsylvania’s Uniform Construction Code (UCC) adopting the 2021 International Energy Conservation Code (IECC).  The state adopted the model code with several amendments, retaining some prior modifications and declining to adopt certain new national provisions.  The update was officially approved on October 16, 2025, and became effective January 1, 2026. Any design or construction…
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Connecticut Adopts 2021 IECC: Overview of Changes for Residential Projects

November 9, 2022

Connecticut has amended and adopted the 2021 International Energy Conservation Code (IECC) for residential and commercial buildings. Connecticut was previously operating under the 2018 IECC. The 2021 IECC is mandatory for projects permitted after October 1, 2022. If a municipality requires separate permit applications for different aspects of the project, the application date of the…
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New Jersey Adopts 2021 IECC: Mandatory Envelope Leakage Test for Residential Projects

October 11, 2022

New Jersey has amended and adopted the 2021 International Energy Conservation Code (IECC) for residential buildings, as well as ASHRAE Standard 90.1-2019 for commercial buildings. The 2021 IECC will take the place of the 2018 IECC under which New Jersey currently operates. The 2021 IECC will become mandatory for buildings submitting permits on or after…
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Pennsylvania Adopts 2018 IECC: How Residential Energy Code is Impacted 

February 21, 2022

The Pennsylvania (PA) Uniform Construction Code (UCC) Review and Advisory Council (RAC) has reviewed and adopted the 2018 International Energy Conservation Code (IECC). The 2018 IECC will take the place of the PA-amended version of the 2015 IECC. There is a six-month grace period during which projects in Pennsylvania can still comply with the PA-amended…
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Casa Indiana Recognized With Multiple Green Building & Affordable Housing Awards

January 11, 2021

ReVireo is excited to announce that Casa Indiana, an affordable and supportive housing community in Philadelphia, PA, has been selected as the winner of the Green Building United Groundbreaker 2020 Awards, as well as a recipient of both the COTE (Committee on the Environment) Architectural Excellence Award from AIA Pennsylvania, and an SHN (Senior Housing…
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Strong Housing Market, Strong Demand for HERS Ratings

September 29, 2020

In the midst of an ongoing pandemic, you might think that potential buyers would hesitate to commit to a new home – but recent data is showing that the demand for high quality, energy-efficient homes is still going strong. Demand Still Growing National production builder Toll Brothers, a ReVireo client, recently reported its third-quarter results,…
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