Utah Energy Rebates 2026: What Homeowners Can Still Save on Windows, Insulation, and More
- S. Thiel
- 4 days ago
- 7 min read
If you are a Utah homeowner planning to replace old windows, beef up attic insulation, or tighten up a drafty house this year, the tax and rebate landscape has shifted in a big way. The federal Energy Efficient Home Improvement Credit (the one many of our customers used in 2024 and 2025) officially ended on December 31, 2025. The good news: Utah's two major utilities, Rocky Mountain Power and Enbridge Gas, are still paying real money back on exactly the kinds of upgrades we install every day along the Wasatch Front.
Here is a plain-English look at what is still available in 2026, who qualifies, and how to stack rebates so you get the most out of every improvement to your Clearfield, Layton, Ogden, Bountiful, or Salt Lake area home.
The Federal Tax Credit Update: Section 25C Expired
For several years, homeowners could claim up to $1,200 per year in federal tax credits for qualifying energy-efficient improvements under Internal Revenue Code Section 25C. That included up to $600 for ENERGY STAR certified windows, $500 for exterior doors, and $1,200 toward insulation and air sealing materials.
That credit is no longer available for projects completed in 2026. The One Big Beautiful Bill Act (Public Law 119-21), signed July 4, 2025, terminated Section 25C for property placed in service after December 31, 2025. The IRS confirmed this in its official FAQ guidance.
Translation: if your new windows, insulation, or heat pump were installed in 2026, you cannot claim the 25C credit on your federal return. If the work was completed and paid for in 2025, you may still be able to claim it on your 2025 taxes. Talk to your tax preparer.
That makes the local utility rebates below more important than ever, because for most Utah homes they are now the biggest pot of money on the table.
Rocky Mountain Power Wattsmart Rebates (Utah, 2026)
If Rocky Mountain Power serves your home and you have electric heat, electric cooling, or a heat pump, you may qualify for the Wattsmart Homes program. Here is what is being paid in 2026 for the upgrades we install most often.
Windows
$50 per window for homes with electric heat
$30 per window for homes with electric cooling (but not electric heat)
$30 per window for homes with a dual fuel heat pump (added for installations on or after February 27, 2026)
Must be ENERGY STAR certified with a U-factor of 0.22 or lower
Existing home only; new construction does not qualify
Insulation
Attic: $0.10 per square foot (pre-existing insulation R-20 or less, final R-49 or higher)
Walls: $0.65 per sq ft in electrically heated homes; $0.25 per sq ft electrically cooled. Must add R-13 or more to walls with no existing insulation.
Floors: $0.65 per sq ft electric heat; $0.10 per sq ft electric cool. Pre-existing R-11 or less, final R-30 or higher.
Rates above apply to contractor-installed insulation; self-installed insulation is reimbursed at a lower rate for walls and floors, so ask your rebate coordinator which rate applies to your project.
Homes built in 2015 or later typically do not qualify (they already meet code).
Smart Thermostats
$75 per ENERGY STAR certified smart thermostat, up to 2 per home.
Eligibility basics: your home must be on rate schedules 1, 2, or 3, electric heat or cooling must serve at least 80% of the conditioned space, and you have 180 days from project completion to submit your rebate. Payment typically arrives within 14 business days of approval. Full details are on Rocky Mountain Power's Wattsmart Homes site.
Enbridge Gas ThermWise Rebates (Utah, 2026)
If your home is heated with natural gas, you are almost certainly an Enbridge Gas customer (formerly Dominion Energy Utah). Their ThermWise Weatherization program is one of the most generous in the state, and it is available to any residential customer on the GS (general service) rate schedule.
Windows
$2.50 per square foot of window area replaced
Must have a U-factor of 0.22 or lower (NFRC certified)
No authorized contractor required for windows
Insulation
Attic Tier 1: $0.32 per sq ft — add at least R-19, final R-49 to R-60
Attic Tier 2: $0.08 per sq ft — add at least R-11
Walls: $0.30 per sq ft (R-11 or higher added)
Floors: $0.20 per sq ft (R-19 or higher added)
Continuous exterior rigid insulation: $0.40 per sq ft (cap $800)
Air Sealing and Ducts
Whole-home air sealing (single-family): $200 base + $0.10 per sq ft of conditioned area, capped at $850. Requires a ThermWise Home Energy Plan and R-49 or higher attic insulation.
Duct sealing / insulation: $100 base + $5.25 per linear foot, capped at $450
Smart Thermostats
$50 for a Tier 1 thermostat with geofencing
$75 for a Tier 2 thermostat with occupancy sensing
Most insulation, air sealing, and duct work must be performed by a ThermWise authorized contractor, and you have 6 months from project completion to apply. The official list of measures and rebate amounts is at Enbridge Gas's ThermWise weatherization page.
Yes, You Can Stack Rocky Mountain Power and Enbridge Gas Rebates
One of the most common questions we hear is whether you have to pick between the two utilities. You do not. If your home is served by both Rocky Mountain Power (electric) and Enbridge Gas (natural gas), you can claim both rebates on the same project as long as the measure qualifies under each program.
Quick example: Replacing 15 windows (around 195 sq ft of glass area) on a home with electric heat and natural gas:
Rocky Mountain Power Wattsmart: 15 × $50 = $750
Enbridge Gas ThermWise: 195 sq ft × $2.50 = $487.50
Combined rebate: $1,237.50 on one project
Attic insulation stacks the same way. On a 1,500 sq ft attic upgraded from R-20 to R-49, a dual-fuel home can pocket roughly $150 from Rocky Mountain Power plus up to $480 from Enbridge Gas — $630 back before the truck pulls away.
What Makes a Window "Rebate-Eligible" in Utah?
Both Rocky Mountain Power and Enbridge Gas use the same technical threshold for windows: a U-factor of 0.22 or lower. That number comes from the NFRC (National Fenestration Rating Council) sticker on every new window and measures how much heat escapes through the glass. Lower is better.
For context, a builder-grade double-pane window from the early 2000s often measures U-0.35 or higher. The triple-pane windows we install at Comfort Home Improvements routinely come in at U-0.20 or U-0.18, well under the rebate threshold.
If you are buying from any contractor, ask to see the NFRC label before you sign. Without a certified U-factor at or below 0.22, the windows will not qualify for either utility rebate.
How to Apply for Your Utah Rebates
The paperwork is straightforward if you stay organized. Here is what each utility will ask for.
A copy of your itemized invoice showing the measure, quantity, and cost
NFRC labels or manufacturer spec sheets for windows and doors
Insulation certificates listing R-value installed and square footage
Your utility account number (find it on your bill)
Before and after photos for insulation projects (Enbridge typically requires these)
Timing matters. Rocky Mountain Power gives you 180 days from project completion to submit; Enbridge Gas allows up to 6 months. Miss the window and the rebate is gone. We include the required documentation with every project we complete, so you have what you need to file on day one.
How Comfort Home Improvements Handles the Rebate Process
We have been installing windows, siding, insulation, and gutters across Davis, Weber, Salt Lake, and Cache counties for years, and rebate paperwork is part of the job. When you work with us on a qualifying project, we:
Spec products that meet the U-0.22 or R-value requirements for Utah rebates
Provide NFRC labels, insulation certificates, and itemized invoices automatically
Take the required before and after photos for insulation work
Walk you through which rebate forms to file with which utility
Coordinate with ThermWise authorized contractors when needed
Asist throughout the enitre rebate process
Ready to see what rebates your home qualifies for? Get a free quote from Comfort Home Improvements and we will build the rebate paperwork right into your proposal.
Frequently Asked Questions
Can I still claim the federal tax credit on my 2025 taxes?
Possibly, yes. If the qualifying windows, doors, or insulation were placed in service on or before December 31, 2025, the Section 25C credit should still be available on your 2025 return. Projects placed in service in 2026 or later do not qualify. Confirm with your tax preparer.
My home was built in 2018. Do I still qualify for insulation rebates?
Usually not through Rocky Mountain Power — homes built in 2015 or later typically already meet the code minimums that rebates are designed to exceed. Enbridge Gas is more flexible, but the existing R-value still has to be below the program's trigger. We can inspect your attic and tell you either way.
Do I have to use an approved contractor?
For Rocky Mountain Power Wattsmart windows, no. For Enbridge Gas ThermWise insulation, air sealing, and duct work, yes — a ThermWise authorized contractor must perform the work. Comfort Home Improvements can coordinate those pieces so everything qualifies.
How long does it take to get my rebate check?
Rocky Mountain Power generally pays within 14 business days of approving your application. Enbridge Gas typically processes rebates in 4 to 6 weeks. Both utilities mail a check or apply a credit to your account.
Are there any income-based or low-income programs?
Yes. Both Rocky Mountain Power and Enbridge Gas participate in Utah's statewide Weatherization Assistance Program, which provides free or heavily subsidized insulation, air sealing, and window upgrades to income-qualified households, administered through local community action agencies. Rocky Mountain Power specifically partners with the state's Housing and Community Development division on this weatherization assistance, while Enbridge Gas customers can find WAP program details and eligibility directly on the utility's bill assistance page. There's also a separate HEAT (Home Energy Assistance Target) program for help with ongoing utility bills, which is run alongside WAP. Ask us during your free quote and we will point you to the right program and local agency for your county
The federal credit may be gone, but between Rocky Mountain Power and Enbridge Gas, most Utah homes can still recover a meaningful chunk of their window, insulation, and weatherization costs in 2026. The best time to start is before your heating or cooling season peaks.
Call Comfort Home Improvements at (801) 656-7524 to get started, or set up a free in-home appointment below. We will walk your home, spec the right products for the rebate program you qualify for, and handle the paperwork so you keep every dollar you earned.
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