Could Wildfire Risk Hurt Your Mortgage—or Get You a Better Deal?

Plus: cars join the home energy microcosm, plants move from décor to building science, and questions arise over DOE’s new approach to the 2024 IECC. 

Housing has always been about location. Increasingly, it’s also about risk—and who is willing to take it.

A new study of more than 730,000 California mortgage applications found a striking split in how lenders respond to wildfire risk. Traditional lenders became less likely to approve mortgages as wildfire risk increased and charged higher rates on loans they did approve. Online fintech lenders? Their approval rates barely changed, and borrowers in the highest-risk areas actually received somewhat lower rates than comparable borrowers in very low-risk areas.

That raises an increasingly important housing question: Who ultimately prices climate risk into a home?

It’s particularly relevant when we’re still debating whether to build more housing in some of those risky places. “Big Short” investor Michael Burry is suing to stop a 25-home development in the wildfire-prone hills of Saratoga, Calif. The concern isn’t just whether the houses can withstand a fire. It’s whether residents can get out via rolling mountain roads.

Risk, of course, isn’t the only thing changing the value equation.

GM Energy and PG&E are blurring the line between car and house with a California pilot that brings home EV charging and smart-charging incentives directly into the dealership. With the right equipment and compatible EV, GM’s PowerShift charger can even help send electricity from the vehicle back into the home during an outage.

Meanwhile, the building industry is wrestling with performance from several directions. Green Builder Coalition Executive Director Mike Collignon questions DOE’s new approach to the 2024 IECC, arguing that the debate raises larger questions about trust in federal energy-code analysis.

The U.S. Green Building Council, meanwhile, has released new tools aimed at helping owners move beyond individual green projects and decarbonize entire portfolios of existing buildings.

And then there’s the decidedly less conventional approach: plants. Yale-led researchers are exploring “metabolic architecture,” using plant-based biofilters and carefully controlled airflow and lighting to pull CO₂ from indoor air. No, sticking another fiddle-leaf fig in the corner of your living room isn’t going to replace your HVAC system, but designing living systems into buildings could someday give us another way to manage indoor air quality.

Some old ideas are resurfacing, too. Gen Z may be rediscovering the “cold room,” embracing bedrooms designed specifically for cool, dark, quiet sleep after years of asking rooms to double as offices, gyms, and space to tech-binge.

That focus on long-term performance runs all the way down to the products we touch every day. Our Editors’ Product Pick this week is Kwikset’s Signature Series door hardware, which will be showcased in the VISION House Asheville, where durability, re-keyable locks and longer product life show that sustainability doesn’t always require complicated technology.

And on the latest The Valuation Metric pod, Sara Gutterman and Alair Homes CEO and President Rob Cecil take that idea even further: A home’s real value begins with the decisions made before construction starts.

That’s also the thinking behind Green Builder Media’s new COGNITION Smart Data report, Full Cost, Not First Cost, Will Unlock Future Housing Affordability, which looks beyond purchase price to what buyers are willing to trade for homeownership and how operating costs are reshaping affordability. You can download the report for free here. 

Also this week: As energy codes push continuous insulation into more exterior wall assemblies, the EIFS Industry Members Association has launched a searchable gallery of more than 200 real-world projects, giving architects and specifiers a new resource for seeing how exterior insulation and finish systems are being used across building types.

Watch the full This Week’s Sustainable Building News episode here or wherever you get your podcasts. Rather read the script? Here it is. Have a great sustainability news or trend story? Send it to Cati O’Keefe at cati.okeefe@greenbuildermedia.com

Upcoming Building and Sustainability Events

October 8–10: PhiusCon, Phoenix, Ariz.

October 18–21: International Code Council’s 2026 Annual Conference and Expo, Nashville, Tenn.

October 19-21: HousingWire Homebuilder Summit, Dallas, Tex.

October 20–23: Greenbuild 2026, New York

October 23: NAHB’s 2027 Sustainability and Green Building Scholarship Application Due

October 25: Women in Construction Conference, Arlington, Va.

October 26–28, ULI Fall Meeting 2026, Miami

November 4–5: Build Expo Show, Los Angeles

November 4–5: The Building Products Customer Workshop, Nashville

November 4–6: 2026 Design-Build Conference and Expo, Cleveland

November 18: 2026 Southwest Utility Energy Efficiency Workshop, Santa Fe

November 16-18: AHF Live: The Affordable Housing Developers Summit, Chigaco

November 18–20: 1st International Online Conference on Sustainable Construction (GO BUILD 2026) (Virtual)

December 9: International Conference on Sustainable Architecture and Urban Design Engineering (ICSAUDE), New York

January 28-29: ICGBS 2027: 21. International Conference on Green Building and Sustainability, New York

February 2-4, Design & Construction Week 2027 (IBS & KBIS), Las Vegas

March 1-5, 2027, ASCE2027: The Infrastructure and Engineering Experience, Philadelphia