Replacement Windows in Idaho

Rebates & incentives

The federal window tax credit (25C) ended for projects placed in service after December 31, 2025. If your windows were installed in 2025, you can still claim it on your 2025 return — but for new projects there is no federal window credit. State and utility programs are now the main source of window incentives.

Idaho's IRA Home Energy Rebates would have been administered by the Idaho Office of Energy and Mineral Resources (OEMR, formerly the Governor's Office of Energy Resources), but in March 2025 the Legislature's budget committee (JFAC) refused to authorize the roughly $24.6M in federal HOMES/HEAR spending, so the programs are not launching and Idaho's allocation is being reallocated to participating states. Had they launched, windows would only have qualified through the whole-home HOMES modeled-savings track, not as a standalone rebate. OEMR still lists the rebates as "not currently available" and advises against basing purchases on anticipated rebates, so confirm current status before relying on any state rebate.

• Idaho Power efficiency rebates. Idaho Power's retail efficiency rebates center on heat pumps, HVAC, and smart thermostats rather than windows; energy-efficient windows are available mainly to income-qualified, electric-heat households through its Weatherization Assistance program delivered by community action partners. (Idaho Power (idahopower.com))
• Intermountain Gas residential efficiency. Intermountain Gas's residential efficiency program offers rebates on high-efficiency furnaces, water heaters, and appliances but does not rebate replacement windows, and it excludes measures already required by Idaho code. (Intermountain Gas (intgas.com))

Energy code

Idaho enforces the statewide Idaho Energy Conservation Code (2020 edition), based on the 2018 IECC with state amendments including Idaho-specific window U-factor tables, in effect since January 2021; Boise permitting runs through the city building department, and Boise's cold IECC zone 5B climate drives low-U-factor replacement-window specs.

Local market research in Idaho

• Replacement windows in Boise, ID covers costs, codes, rebates, and local FAQs.