California this month became the first U.S. state to require solar panels on almost all new homes.
Most new units built after Jan. 1, 2020, will be required to include solar systems as part of the standards adopted by the California Energy Commission. Estimates are that the mandate will drive up the cost of buying a house by almost $10,000.
The PV-on-house law is a new component of Governor Jerry Brown’s effort to slash carbon emissions by 40% by 2030, and provides a potential roadmap for other states to follow. The U.S. had 10.4 gigawatts of residential solar power at the end of last year, up more than 600% from five years earlier. California’s move will boost the residential solar industry, which started slowing in 2017 after government policy changes and efforts by some companies to shift their strategies.
Installation of a solar system and other energy-efficiency requirements will add about $9,500 to the cost of a new home, according to the California Energy Commission. The cost would be offset by about $19,000 in expected energy and maintenance savings over 30 years, according to the commission.
Related Stories
Codes and Standards | Mar 18, 2024
New urban stormwater policies treat rainwater as a resource
U.S. cities are revamping how they handle stormwater to reduce flooding and capture rainfall and recharge aquifers. New policies reflect a change in mindset from treating stormwater as a nuisance to be quickly diverted away to capturing it as a resource.
Plumbing | Mar 18, 2024
EPA to revise criteria for WaterSense faucets and faucet accessories
The U.S. Environmental Protection Agency (EPA) plans to revise its criteria for faucets and faucet accessories to earn the WaterSense label. The specification launched in 2007; since then, most faucets now sold in the U.S. meet or exceed the current WaterSense maximum flow rate of 1.5 gallons per minute (gpm).
Adaptive Reuse | Mar 15, 2024
San Francisco voters approve tax break for office-to-residential conversions
San Francisco voters recently approved a ballot measure to offer tax breaks to developers who convert commercial buildings to residential use. The tax break applies to conversions of up to 5 million sf of commercial space through 2030.
Codes and Standards | Mar 15, 2024
Technical brief addresses the impact of construction-generated moisture on commercial roofing systems
A new technical brief from SPRI, the trade association representing the manufacturers of single-ply roofing systems and related component materials, addresses construction-generated moisture and its impact on commercial roofing systems.
MFPRO+ News | Mar 12, 2024
Multifamily housing starts and permitting activity drop 10% year-over-year
The past year saw over 1.4 million new homes added to the national housing inventory. Despite the 4% growth in units, both the number of new homes under construction and the number of permits dropped year-over-year.
Affordable Housing | Mar 11, 2024
Los Angeles’s streamlined approval policies leading to boom in affordable housing plans
Since December 2022, Los Angeles’s planning department has received plans for more than 13,770 affordable units. The number of units put in the approval pipeline in roughly one year is just below the total number of affordable units approved in Los Angeles in 2020, 2021, and 2022 combined.
Codes and Standards | Mar 7, 2024
Public comments sought on measuring lifecycle of greenhouse gas emissions of buildings
ASHRAE and the International Code Council seek comments on their jointly developed document, Proposed ASHRAE/ICC Standard 240P—Quantification of Life Cycle Greenhouse Gas (GHG) Emissions of Buildings.
Green | Mar 5, 2024
New York City’s Green Economy Action Plan aims for building decarbonization
New York City’s recently revealed Green Economy Action Plan includes the goals of the decarbonization of buildings and developing a renewable energy system. The ambitious plan includes enabling low-carbon alternatives in the transportation sector and boosting green industries, aiming to create more than 12,000 green economy apprenticeships by 2040.
Codes and Standards | Mar 1, 2024
NIBS report focuses on how commercial buildings access and use water resources
The National Institute of Building Sciences (NIBS) issued a new report, Clean Water, Sanitation, and the Built Environment, focusing on how commercial buildings and residential buildings access and use water resources.
Windows and Doors | Feb 28, 2024
DOE launches $2 million prize to advance cost-effective, energy-efficient commercial windows
The U.S. Department of Energy launched the American-Made Building Envelope Innovation Prize—Secondary Glazing Systems. The program will offer up to $2 million to encourage production of high-performance, cost-effective commercial windows.