
One of the most urgent challenges in buildings today is how to affordably retrofit existing ones. Too much of our current building stock wastes energy and is unhealthy or uncomfortable to occupy, especially in low-income communities and communities of color. In order to limit global warming to 1.5°C, the International Energy Agency's Net Zero by 2050 Roadmap urges a step jump in "zero-carbon-ready" retrofits to a rate of 30 million dwellings per year through 2030. Passive House retrofits provide a proven pathway to dramatically reduce the energy use and operation carbon emissions of existing buildings of all types. Both PHI and PHIUS offer retrofit certification pathways, and project teams around the world are tackling retrofits of everything from single-family brownstones to apartment towers.
Read, view, and listen to Passive House retrofit examples and insights in the articles, videos, and podcast interviews below.
Articles

9/17/25
Colonial II—The First Net Zero Carbon Multifamily Retrofit in New York State | Project of the Month | PHA Live!
PHA Live, Video, Retrofit

9/4/25
Retrofitting Like the Future Depends on It
Article, Phius, PHI, Retrofit

6/26/25
Avoiding Health Problems with Better Housing
Article, Retrofit, Health & IAQ

5/29/25
Pairing EIFS with Stone Wool Insulation: Two Case Studies
Article, Insulation, Retrofit, Sponsored
Videos

9/24/25
Summer Lab Reports | Field Notes | PHA Live!
PHA Live, Video

9/17/25
Colonial II—The First Net Zero Carbon Multifamily Retrofit in New York State | Project of the Month | PHA Live!
PHA Live, Video, Retrofit

9/10/25
How to Make Passive House Certification Modeling Easier | Master Class | PHA Live!
PHA Live, Video, Energy Modeling

9/4/25
Reimagining Buildings: Designing Buildings That Set Us Free
Video
Projects

4/18/24
Colombini Residence
Project Case Study, Mixed Use, New Construction, Single Family, Mass Timber

4/18/24
Bird's Wing Passivhaus + Duplex
Project Case Study, Mixed Use, New Construction, Multifamily, Single Family, Duplex/Multiplex, Mass Timber, PHI

4/18/24
Leichhardt enerPHit
Project Case Study, Mixed Use, Retrofit, Single Family, PHI

4/18/24
Bellwether on Main
Project Case Study, New Construction, Phius, Single Family