Insulation in Eliot, Maine

Insulation and air sealing in Eliot

Eliot runs to about 20 square miles and roughly 7,146 people. It sits about 44 miles southwest of downtown Portland. Around 3,201 housing units sit inside those boundaries. The community dates back to 1810. We cover ZIP code 03903.

No completed job in Eliot is logged in our records yet, and this page will say so until one is.

The housing stock in Eliot

The typical home in Eliot dates to around the late-1970s. Postwar building here often meant three or four inches of fiberglass and no attempt at air sealing. If nobody has touched it since, that is what is still up there.

We work across Eliot rather than one corner of it — South Eliot, Green Acre, East Eliot, Crams Corner, Gould Corner, Kennard Corner, Tobeys Corner, Rosemary and Frankfort Island included. Construction and vintage change between them, sometimes by thirty years and a whole different framing method, which decides whether a wall can be dense-packed at all.

Eliot was settled in 1623 as part of Kittery and became its own town in 1810. It lies along the Piscataqua River and Sturgeon Creek across from Portsmouth and Newington, New Hampshire, rather than on the open ocean, and includes the village of South Eliot and the Green Acre community.

Eliot homes in the Census numbers

The Census Bureau estimates 3,201 homes in Eliot. 783 of them (24%) went up before 1940 — 10th of 64 places on this site for pre-1940 housing. More of today's homes date from before 1940 than from any single decade since, and 52% predate 1980. For York County as a whole the pre-1940 share is 20%, so Eliot sits above it.

Of 3,040 occupied homes, 3% heat with utility gas and 7% with electricity; another 21% burn propane or other tank gas. Electric heat here is less common than across the county (10%), and ranks 41st of 64 on this site. Whoever comes out will ask what heats the house first: the rebate is the same on any fuel, but the saving is not.

80% of occupied homes are owner-occupied and 81% of all homes are single-family detached houses, with 103 mobile homes in the count. On a housing mix like this, the likely starting points are the attic, which is where most houses here start.

3,201 homes, Census ACS 2020–2024 (B25034, B25040, B25003); 3,040 occupied.

Sealing comes first in Eliot

755 of Eliot's 3,201 homes (24%) were built in the 1980s and 1990s. The gaps in houses of that age are the parts nobody sealed: batts stuffed into the rim joist, bare spots over cathedral and tray ceilings, soffit vents buried with no baffles, can lights punched through the ceiling plane. A top-up plus a day of sealing usually covers it.

What the energy code requires in Eliot

Eliot enforces the Maine Uniform Building and Energy Code (2021 IECC with Maine amendments). Eliot's building permit application asks for plans showing compliance with the state code; the town names no edition, and the state's 2021 codes have applied since April 7, 2025.

Under that edition the required attic value for new work here is R-60, and walls R-30, or R-20 + R-10 continuous, or R-13 + R-15 continuous, or R-20 continuous. For comparison, the Department of Energy recommends R60 for an uninsulated attic in climate zone 6A, where Eliot sits, and R49 where there are already a few inches up there.

The 2021 IECC insulation table (R402.1.3), climate zone 6; Maine's energy chapter changed the wood-frame wall entry and left the attic at R-60.

Do you need a permit to insulate here?

Nothing Eliot publishes settles this. Its permit lists name the work types it cares about, and insulation is not among them in either direction. Eliot's FAQ treats routine maintenance as permit-free but says any project that materially alters a structure, for example by spending $2,000 or more, needs a building and use permit. So we ask the department directly before the first day on site, and whatever comes back, pulling it is our job rather than yours.

Permits and inspections in Eliot

The published number is 207-439-1813. The department page is here.

Permitting is on us, not on you.

Rebates an Eliot homeowner can actually use

In Eliot, 62% of occupied homes heat with fuel oil or kerosene, 21% with propane or other tank gas and 7% with electricity, and 3% utility gas (Census ACS 2020–2024). For Eliot homeowners the rebate is Efficiency Maine's: $2,000 for each attic, wall or basement zone of 500 square feet or more at any income ($3,000 moderate, $4,000 low income), with $150 to $300 for attic air sealing on top. Only a Residential Registered Vendor can do rebated work, the claim goes in within six months, and a lifetime limit of $8,600 per home applies. Income-qualified households in York County can apply to York County Community Action Corp (207-324-5762) for free weatherization through MaineHousing instead. The York County page and the rebate guide carry the full rules.

Nearby

Eliot borders Kittery, York, South Berwick, Portsmouth, New Hampshire, Newington, New Hampshire and Dover, New Hampshire. These are the ones we also cover, each with its own energy code and permit rule:

Elsewhere in York County we also cover:

How Eliot compares with its neighbors

Maine sets the residential energy code statewide, so the attic figure is R-60 wherever it is published here; what changes is the permit desk, and 1 of the 7 publishes a permit rule for insulation.

All 29 York County jurisdictions side by side →

Common questions about insulation in Eliot

Code and permit facts checked October 24, 2026, rebates October 24, 2026; housing: Census ACS 2020–2024. Sources: eliotme.gov · eliotmaine.portal.iworq.net (2) · s3.amazonaws.com · maine.gov (2) · en.wikipedia.org (2) · www2.census.gov (2, 3) · prd-tnm.s3.amazonaws.com · efficiencymaine.com (2, 3, 4) · energystar.gov · data.census.gov. These change; confirm with the building department at 207-439-1813 or Efficiency Maine at 866-376-2463 first.