Attic insulation, air sealing, crawl spaces and walls for homes in Kittery — starting with a free assessment that measures the R-value you actually have. The typical home here dates to the mid-1960s, and 25% of its 5,534 homes went up before 1940.
Kittery runs to about 18 square miles and roughly 10,473 people. It sits about 48 miles south of downtown Portland. There are around 5,534 housing units here. The community dates back to 1647. We cover ZIP codes 03904 and 03905.
We have not logged a completed job in Kittery yet. We would rather say so than put a number on this page that is not real.
The typical home in Kittery dates to around the mid-1960s. 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 Kittery rather than one corner of it — Kittery Point, Kittery Foreside, Badger's Island, Gerrish Island, Seavey's Island, Cutts Island, Isles of Shoals, Admiralty Village, Shepherds Hill and Seapoint 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.
Kittery, incorporated in 1647 as the oldest town in Maine, sits at the mouth of the Piscataqua River across from Portsmouth, New Hampshire, and is home to the Portsmouth Naval Shipyard on Seavey's Island. Kittery Point is its seaside district on the open ocean, and the town also takes in Badger's Island and part of the Isles of Shoals.
The Census Bureau estimates 5,534 homes in Kittery. 1,374 of them (25%) went up before 1940 — 8th 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 60% predate 1980. For York County as a whole the pre-1940 share is 20%, so Kittery sits above it.
Of 4,911 occupied homes, 5% heat with utility gas and 13% with electricity; another 18% burn propane or other tank gas. Electric heat here is more common than across the county (10%), and ranks 17th of 64 on this site. Efficiency Maine's insulation rebates do not depend on the fuel or the utility, but the fuel decides what the work saves, so the assessment asks how the house is heated.
67% of occupied homes are owner-occupied and 63% of all homes are single-family detached houses, with 314 mobile homes in the count. Read together, those numbers point toward wall insulation for walls built empty and a vermiculite check before anything is disturbed.
| Built | Homes | Share | |
|---|---|---|---|
| Before 1940 | 1,374 | 25% | |
| 1940s | 738 | 13% | |
| 1950s | 451 | 8% | |
| 1960s | 401 | 7% | |
| 1970s | 367 | 7% | |
| 1980s | 519 | 9% | |
| 1990s | 298 | 5% | |
| 2000s | 922 | 17% | |
| 2010s | 272 | 5% | |
| 2020 or later | 192 | 3% |
5,534 homes, Census ACS 2020–2024 (B25034, B25040, B25003); 4,911 occupied.
1,219 of Kittery's 5,534 homes (22%) date from 1950 through 1979. The leaks in houses of that era repeat: nothing over the top plates, wire and pipe holes left open, an unsealed hatch, a bath fan venting into the attic, and in ranches and split-levels, heat lost at the garage ceiling and over cantilevered floors. Sealing the plates, holes and fans comes before any more fiber, and it is usually a day's work, not a renovation.
Kittery enforces the Maine Uniform Building and Energy Code (2021 IECC with Maine amendments). Kittery's Code Enforcement page says the town has enforced the 2021 codes, energy conservation code included, since April 7, 2025, and Section 16.2.8 of its land use code holds permitted work to the state code.
For new work, the attic number under that edition is R-60, with walls at R-30, or R-20 + R-10 continuous, or R-13 + R-15 continuous, or R-20 continuous. Set that against the Department of Energy, which recommends R60 for an uninsulated attic in this climate zone and R49 for one that already has a few inches.
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.
Kittery requires a permit for this work. Kittery's land use code (Section 16.2.8) requires a building/regulated activity permit whenever the fair market value of the work is more than $2,000, as well as for structural alterations and work that needs a Code Enforcement Officer inspection. We pull it as part of the job.
The published number is 207-475-1304. The department page is here.
Permitting is on us, not on you.
Heating fuel in Kittery, by the Census Bureau's count: fuel oil or kerosene in 60% of occupied homes, electricity in 13%, propane or tank gas in 18%, and 5% utility gas (Census ACS 2020–2024). For Kittery 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. The work has to be done by an Efficiency Maine Residential Registered Vendor, and the attic has to start at R-21 or below and finish at R-49 or more. Income-qualified households in York County can apply to York County Community Action Corp (207-324-5762) for free weatherization through MaineHousing instead. See the rebate guide for the tiers and the checklist, and the York County page for the county.
Every layer of an insulated attic, explained
Kittery borders Eliot, York, Portsmouth, New Hampshire, New Castle, New Hampshire, Rye, New Hampshire and Piscataqua River. These are the ones we also cover, each with its own energy code and permit rule:
Elsewhere in York County we also cover:
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.
| City | Energy code | Attic R required | Permit to insulate | Building dept. |
|---|---|---|---|---|
| Kittery | Maine code, 2021 IECC | R-60 | Yes | 207-475-1304 |
| Eliot | Maine code, 2021 IECC | R-60 | Not published | 207-439-1813 |
| York | Maine code, 2021 IECC | R-60 | Not published | 207-363-1002 |
| Acton | Maine code, 2021 IECC | R-60 | Not published | 207-636-3131 |
| Alfred | Maine code, 2021 IECC | R-60 | Not published | 207-324-5872 |
| Arundel | Maine code, 2021 IECC | R-60 | Not published | 207-985-4201 |
| Berwick | Maine code, 2021 IECC | R-60 | Not published | 207-698-1101 |
All 29 York County jurisdictions side by side →
Kittery enforces the Maine code, 2021 IECC, which sets R-60 for an attic in new work. That code also reaches work on existing houses, not only new ones.
Yes. Kittery requires a permit for this work, and we pull it as part of the job.
The statewide Efficiency Maine rebates: $2,000 to $4,000 per insulated zone of 500 square feet or more, by income tier, and $150 to $300 for attic air sealing; the work has to be done by a Residential Registered Vendor and the attic has to start at R-21 or less. The federal 25C credit ended for work placed in service after December 31, 2025.
The typical home in Kittery dates to around the mid-1960s; the Census Bureau's 2020-2024 median year built is 1965. Of its 5,534 homes, 25% went up before 1940 and 25% in 2000 or later. It is a median for the place, not a survey of individual houses.
Code and permit facts checked October 24, 2026, rebates October 24, 2026; housing: Census ACS 2020–2024. Sources: kitteryme.gov (2) · ecode360.com (2, 3) · kitteryme.viewpointcloud.com · api-east.viewpointcloud.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 207-475-1304 or Efficiency Maine at 866-376-2463 first.
Free assessment, measured at the hatch, with the photographs and the number in writing.
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