Insulation and air sealing for Georgetown homes: attics, crawl spaces, rim joists and walls, starting with a free assessment of the R-value you actually have. The typical home here dates to the early-1980s, and 22% of its 1,013 homes went up before 1940.
Georgetown runs to about 19 square miles and roughly 1,012 people. It sits about 25 miles east of downtown Portland. There are around 1,013 housing units here. The community dates back to 1716. We cover ZIP code 04548.
We have not logged a completed job in Georgetown yet. We would rather say so than put a number on this page that is not real.
The typical home in Georgetown dates to around the early-1980s. Houses of this vintage usually got batts or blown fiber at whatever the standard of the day was, which is well short of what is recommended now. Most are one top-up away from being right.
Slightly over half of the town's homes are seasonal, many close to the water, and the old villages of Five Islands and Bay Point are the most tightly built.
We work across Georgetown rather than one corner of it — Five Islands, Bay Point, Robinhood, Marrtown, West Georgetown, Georgetown Center, Indian Point and MacMahan 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.
Georgetown is an island town between the mouths of the Kennebec and Sheepscot rivers on the Gulf of Maine, connected to the mainland by bridges on Route 127, the only road on and off the island. Its villages grew on fishing, farming, boatbuilding and summer visitors, and coastal lots are prized for homes. Reid State Park and other conserved land cover more than a third of the island.
The Census Bureau estimates 1,013 homes in Georgetown. 221 of them (22%) went up before 1940 — 14th 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 49% predate 1980. For Sagadahoc County as a whole the pre-1940 share is 27%, so Georgetown sits below it.
Of 487 occupied homes, 1% heat with utility gas and 2% with electricity; another 14% burn propane or other tank gas. Electric heat here is less common than across the county (11%), and ranks 62nd of 64 on this site. The heating fuel does not change the Efficiency Maine rebate, but it does change what each inch of insulation is worth, which is why the boiler, furnace or heat pump is the first thing an assessment looks at.
83% of occupied homes are owner-occupied and 89% of all homes are single-family detached houses, with 64 mobile homes in the count. With houses like these, the conversations we expect most are about the attic, which is where most houses here start.
| Built | Homes | Share | |
|---|---|---|---|
| Before 1940 | 221 | 22% | |
| 1940s | 75 | 7% | |
| 1950s | 22 | 2% | |
| 1960s | 58 | 6% | |
| 1970s | 125 | 12% | |
| 1980s | 165 | 16% | |
| 1990s | 136 | 13% | |
| 2000s | 153 | 15% | |
| 2010s | 58 | 6% | |
| 2020 or later | 0 | 0% |
1,013 homes, Census ACS 2020–2024 (B25034, B25040, B25003); 487 occupied.
301 of Georgetown's 1,013 homes (30%) 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.
Georgetown does not publish the energy code edition it enforces, so this page does not name one. Georgetown had 1,058 residents in 2020 and is not required to enforce the state code; its Building/Demolition Permit Ordinance sets the town's own permit rules. Maine has one energy code for the whole state, the 2021 IECC with Maine's changes. A town of 4,000 or fewer people does not have to enforce it, but the state says it still applies to every building, and meeting it is the owner's responsibility.
Georgetown publishes no answer either way. Insulation and air sealing appear on neither the permit-required list nor the exempt list. Georgetown's Building/Demolition Permit Ordinance (amended June 13, 2026) exempts normal, routine maintenance and repairs, with siding and window replacement among its examples; insulation is not named, and work that adds volume or height goes to the Planning Board. We confirm it with the department before we start and pull whatever is needed. We would rather write that here than guess on your behalf.
The published number is 207-295-4332. The department page is here.
Permitting is on us, not on you.
In Georgetown, 72% of occupied homes heat with fuel oil or kerosene, 14% with propane or other tank gas and 2% with electricity (Census ACS 2020–2024). For Georgetown 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 Sagadahoc County can apply to Kennebec Valley Community Action Program (207-859-1500) for free weatherization through MaineHousing instead. Every condition is in the rebate guide. The Sagadahoc County page compares the towns.
Every layer of an insulated attic, explained
Georgetown borders Woolwich, Arrowsic, Phippsburg, Westport Island, Southport and Kennebec River. These are the ones we also cover, each with its own energy code and permit rule:
Elsewhere in Sagadahoc 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. |
|---|---|---|---|---|
| Georgetown | Not published | — | Not published | 207-295-4332 |
| Woolwich | Not published | — | Not published | 207-295-4332 |
| Arrowsic | Not published | — | Not published | 207-295-4332 |
| Phippsburg | Maine code, 2021 IECC | R-60 | Yes | 207-389-2653 |
| Bath | Maine code, 2021 IECC | R-60 | Not published | 207-443-8334 |
| Bowdoin | Not published | — | Not published | 207-250-2399 |
| Bowdoinham | Not published | — | Not published | 207-666-5531 |
All 10 Sagadahoc County jurisdictions side by side →
Georgetown does not publish the energy code edition it enforces, so we do not state a required figure here. The Department of Energy recommends R60 for an uninsulated attic in this climate zone and R49 where there are already a few inches.
Georgetown publishes no rule either way, so we ask its building department at 207-295-4332 before the job is scheduled.
Efficiency Maine's: $2,000 per attic, wall or basement zone of 500 square feet or more at any income, $3,000 at moderate income and $4,000 at low income, plus $150 to $300 for attic air sealing, on work completed by one of its Residential Registered Vendors on or after October 1, 2026. The federal 25C credit ended for work placed in service after December 31, 2025.
The typical home in Georgetown dates to around the early-1980s; the Census Bureau's 2020-2024 median year built is 1980. Of its 1,013 homes, 22% went up before 1940 and 21% in 2000 or later. That is a median across the whole place, so your own house may be older or newer.
Code and permit facts checked October 24, 2026, rebates October 24, 2026; housing: Census ACS 2020–2024. Sources: georgetownme.com (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12) · legislature.maine.gov · www2.census.gov · maine.gov · en.wikipedia.org (2) · zip-codes.com · efficiencymaine.com (2, 3, 4) · energystar.gov · data.census.gov. These change; confirm with the building department at 207-295-4332 or Efficiency Maine at 866-376-2463 first.
Free assessment, a measured R-value, and photos you keep either way.
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