Connecticut will pay a real share of an insulation job — up to $10,000
on a house, more in some cases. But it pays in a strict order, will not pay for
one of the assemblies spray foam contractors sell most often, and pays as a
rebate you claim afterward rather than a discount off the invoice. Miss a step
and the money is gone. Where we could not verify something below, we say so.
Who runs the program
Insulation incentives here run through Energize Connecticut,
funded by the utilities. The rules and the dollar figures are identical whether
Eversource or United Illuminating delivers
your power.
United Illuminating serves six Fairfield County towns: Bridgeport,
Easton, Fairfield, Shelton, Stratford and Trumbull. Eversource serves
the other seventeen: Bethel, Brookfield, Danbury, Darien, Greenwich, Monroe, New
Canaan, New Fairfield, Newtown, Norwalk, Redding, Ridgefield, Sherman, Stamford,
Weston, Westport and Wilton.
Start with a Home Energy Solutions visit
Home Energy Solutions, or HES, is the assessment that opens the door to every
other incentive. Nothing downstream happens without it.
The copay is $40. Energize Connecticut’s wording is
“Effective April 1, 2026, the initial visit has a copay of $40.” Air sealing is
included in the visit at no cost for up to seven hours; past
seven hours a $10 hourly fee applies.
Two warnings about that $40. The Energy Efficiency Board voted in February
2026 to let the utilities set it anywhere in a $0 to $75 range without a
further public vote, so check the figure the day you book rather than
trusting any website including this one. And Eversource’s own HES page is stale:
it still advertises a copay waiver for visits scheduled by 31 March 2026 and
completed by 30 April 2026. That window has closed.
A home that received these services within the last six years
is not eligible again. Demand also runs ahead of funding: “Because of high
demand for this program, there may be a waiting list. The program is subject to
available funding.”
Three income tiers, and the middle one is easy to miss
| Program | Who it is for | Assessment | Insulation |
|---|---|---|---|
| Home Energy Solutions | Above 80% of state median income | $40 copay | Up to 75%, $2.00 per sq ft, $10,000 cap |
| HES – Enhanced Incentives | 61% to 80% of area median income | No cost | Enhanced incentives |
| HES – Income Eligible | At or below 60% of state median income | Little to no cost | Up to 100% |
The middle tier is the one people miss. Households just above the
income-eligible line assume they get the standard deal and never ask. If your
income is anywhere near 80% of area median, ask which tier you are in before you
pay a copay.
Income limits for HES – Income Eligible
Gross annual household income limits, 2026–2027 heating season:
| Household size | Income limit |
|---|---|
| 1 | $48,714 |
| 2 | $63,703 |
| 3 | $78,692 |
| 4 | $93,681 |
| 5 | $108,669 |
| 6 | $123,658 |
| 7 | $126,469 |
| 8 | $129,279 |
Renters can qualify, with one caveat in the program’s own words: “your
landlord may be asked to pay some of the costs.”
What the rebate pays
The standard incentive is “rebates up to $2.00 per square foot or 75 percent
of the total cost, whichever is less, up to a maximum of $10,000.”
- Standard: $2.00 per sq ft or 75%, whichever is less, capped
at $10,000. - Enhanced: $2.50 per sq ft up to $15,000
for income-qualified customers and environmental justice communities. - Income eligible: up to 100%.
- Self-install: $0.25 per sq ft.
There is no per-area split. Attic, walls and basement or
crawl space all draw on the same rate and the same shared $10,000 cap —
not $10,000 for the attic and another $10,000 for the walls. A large house can
reach the cap on the attic alone.
What the rebate will not cover
This section causes more surprised phone calls than everything else here. What
qualifies is “areas of a residential building envelope separating conditioned
and non-conditioned space” — in practice the attic floor, the exterior
walls, and unconditioned basement and crawl space ceilings. What does not:
- “Attic roof decks and rafters do not qualify. Crawl spaces are not on that list either. A crawl space ceiling may or may not be accepted as a floor over unconditioned space depending on how the job is written up, so if the crawl is the work, confirm it with the program before installation rather than after.”
- “Conditioned basements, detached garages, and garages without living space
above do not qualify.”
For a spray foam customer the first exclusion is the important one. Foaming
the roof deck to bring the attic inside the envelope is the right call for some
houses — the clearest case is a house with the air handler and duct runs
up there. But it is not the rebated measure.
That is a real limitation and we will not talk around it. Get both options
priced after incentives before you decide. And do not accept a
contractor who lets you assume a roof-deck foam job comes with a $10,000 rebate.
It does not.
The order of operations
- Home Energy Solutions visit first, before anyone quotes the
insulation work. - Insulation has to be recommended during that visit. The
wording is “recommended during a Home Energy Solutions visit.” If it was not
recommended, it is not eligible. - The project has to be approved before installation.
“Projects must be approved before installation.” - The installer has to be on the Energize CT Insulation Installers
Network. A contractor who is not on it cannot get you the rebate.
Step three is where most people lose the money: the audit happens, insulation
gets recommended, a crew has an opening, and the approval is skipped.
How the money reaches you
This is a post-installation rebate the homeowner applies for,
not a discount off your invoice. You pay in full and then claim.
The window covers measures purchased and installed between 1 January
2026 and 31 March 2027. Mail-in applications must be postmarked by
31 March 2027, or submit online at EnergizeCT.com/Rebates. A
quality assurance inspector may inspect before the rebate is paid.
One thing we could not verify: whether the current form still allows the
rebate check to be assigned to the installing contractor. An older form allowed
it. We could not confirm this one does, so we are not claiming we can take
assignment. Ask the program when you apply; we are asking on your behalf as
well.
What the work costs
Most of our spray foam projects run between $3,500 and
$12,500. Against a 75% limit and a $10,000 cap, a smaller job is
usually constrained by the percentage and a whole-house job by the cap.
Open cell foam runs R-3.9 to R-4.2 per inch. Closed cell
runs R-6.9 to R-7.1 per inch and also acts as a vapor retarder,
which is why it costs more and is right only in some assemblies. All products
are manufactured in the United States and meet applicable building code and
safety standards. After air sealing and insulating, homeowners typically save
20% or more on heating and cooling.
The Smart-E Loan
The Connecticut Green Bank’s Smart-E Loan covers insulation:
6.99% on 5, 7 and 10-year terms, 7.49% at 12
years, 7.99% at 15 years, with lender participation varying by
term. Maximum $50,000, for Connecticut owner-occupied one to
four unit homes.
One correction, because people assume otherwise: the 1.99%
promotional rate is for heat pumps, not insulation. Financing
insulation alone starts at 6.99%.
What Connecticut does not have
No state tax credit and no sales tax exemption
There is no Connecticut income tax credit for insulation and no sales tax
exemption. The residential weatherization products exemption under Connecticut
General Statutes Sec. 12-412k was repealed effective 1 January
2016, so materials and labor are taxable. Any page saying otherwise is
working from pre-2016 information.
No federal tax credit
Section 25C, which covered 30% of insulation costs, is finished. The IRS
wording is “The credit will not be allowed for any property placed in service
after December 31, 2025.” There is no federal insulation credit on a job
installed in 2026, whatever you still read online.
The federal rebate programs have not launched here
Connecticut was allocated roughly $49.8 million for HOMES and HER and roughly
$49.7 million for HEAR. Neither is available today. DEEP’s own page is more than
a year out of date and no primary source confirms either has launched. Do not
plan around this money.
Is the money actually there
The 2025–2027 Conservation and Load Management Plan was approved by
DEEP with a $705 million investment, and the programs completed
over 29,000 residential weatherization projects in 2024. The
money is real. So is the waiting list, and a 2027 plan amendment in progress
could change these rates. We will not promise you a slot.
If you want help
We work across Fairfield County out of New Rochelle, NY. We walk the attic,
the basement and the crawl space, tell you which measures are rebate eligible,
and price both options. No charge for the audit.
Call 914-825-6824. Open 8am–8pm, seven days.
Common questions about Connecticut insulation rebates
How much is the Connecticut insulation rebate in 2026?
Up to $2.00 per square foot or 75% of the total cost, whichever is less,
capped at $10,000. Income-qualified households and homes in designated
environmental justice communities get $2.50 per square foot and a $15,000 cap.
At or below 60% of state median income, approved insulation can be covered up to
100%.
Do I have to get a Home Energy Solutions audit first?
Yes, and in that order. Insulation has to be recommended during the visit,
the project approved before installation, and the installer on the Energize CT
Insulation Installers Network. The copay is $40 as of April 2026, but the
utilities can now set it from $0 to $75 without a public vote.
Does the rebate cover spray foam on the attic roof deck?
No. Attic roof decks and rafters do not qualify, and neither do conditioned
basements or garages without living space above. What qualifies is the envelope
between conditioned and unconditioned space: the attic floor, the walls, and
unconditioned basement and crawl space ceilings. Foaming the roof deck is still
right in some houses, but it is not the rebated measure.
My income is just above the income-eligible limit. Is there anything for me?
Probably, and most people never ask. There is a middle tier between the
standard program and the income-eligible one: households between 61% and 80% of
area median income get a no-cost assessment and enhanced incentives. Ask which
tier you fall into before you pay a copay.
Is there still a federal tax credit for insulation in Connecticut?
No. The Section 25C credit will not be allowed for any property placed in
service after December 31, 2025, so a job installed in 2026 gets nothing
federal. Connecticut has no state income tax credit for insulation and no sales
tax exemption either.
How to check this yourself
- Home Energy Solutions, copay and waiting list:
energizect.com/energy-evaluations/HES - Insulation incentives and exclusions:
energizect.com/rebates-incentives/insulation - Rebate applications:
energizect.com/rebates - Smart-E Loan rates:
ctgreenbank.com - United Illuminating service area:
uinet.com/w/service-area - Section 25C termination:
the IRS FAQ - The repealed exemption: CGS Sec. 12-412k
Verified 5 September 2026. Programs change — if you are reading
this much later, check the links above.