

Window and siding replacement in Harpswell
Replacement windows and new siding for homes in Harpswell. Here a re-side needs a permit, and a replacement window has to be U-0.30 or lower.
What we do in Harpswell


Siding replacement
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Vinyl siding
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Fiber cement
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Hail & storm damage
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Older homes
Learn moreHarpswell at a glance
- People
- 5,046
- Homes
- 4,286
- Size
- 24.1 square miles
- From downtown
- About 15 miles east
- ZIP codes
- 04079, 04066, 04003
- Founded or incorporated
- 1775
Harpswell is Harpswell Neck plus three large islands linked by bridges, Sebascodegan (Great Island), Orr's Island and Bailey Island, and 95 smaller islands, with about 216 miles of Casco Bay coastline. It leads Maine in active lobstering licenses, and the Bailey Island Bridge, built in 1927 and 1928, is thought to be the only cribstone bridge in the world.
The houses in Harpswell
In Harpswell, 51% of homes went up before 1980 and 20% before 1940; the median one dates from 1979. 91% are detached single-family houses, and owners live in 83% of the occupied ones. With most of the housing older than 1980, the federal lead rule is likely on most window and siding jobs here. What the lead rule requires of a contractor.
By the owners' own estimate, the median owned home in Harpswell is worth about $609,700. 62% of homes have three or more bedrooms, and each bedroom needs an emergency escape opening under the egress rule.
Half the homes in Harpswell were built before 1979, which makes its housing about 3 years newer than across Cumberland County as a whole (median 1976). Set against Cumberland County as a whole, owners live in 83% of occupied homes here against 70% county-wide, the median owner-estimated value is $609,700 here and $451,200 across the county and detached houses are 91% of the homes, above the county's 63%.
- Rooms in the median home
- 5.8
- Heated with gas / electricity
- 1% / 7%
- Townhouses and other attached homes
- 1%
- Homes in buildings of 2 to 4 units
- 2%
- Homes in buildings of 5 or more units
- 1%
- Mobile homes
- 5%
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates (tables B25034, B25035, B25024, B25003, B25077, B25041, B25018 and B25040), read through Census Reporter. These are survey estimates, not a count of every house.
What that vintage turns up
The largest group of homes in Harpswell, 29% of them, was built in the 1980s and 1990s, so that is the house described here.
Double-glazed vinyl or clad wood windows with a nailing fin, many now thirty or forty years old. The common failure is the seal between the panes: once it lets go the glass fogs between the layers and the gas fill is gone. When the frames are still square and dry, new sealed glass in the old frame is the cheaper repair; when the frames are cracked or the sills are soft, it is time for the whole unit.
The capes, colonials and raised ranches of the subdivisions that spread across the commuter towns, sided in vinyl or cedar clapboard over plywood or particle-board sheathing, with felt paper or an early house wrap behind it. The siding itself usually holds up; what to look at is what water has done at the corners, around the windows and under any deck ledger fastened through the siding.
The one to watch on a house of this age
Windows of this era were often sealed to the wrap with caulk and little else. When the siding comes off, check the sheathing below each window's lower corners: that is where a failed caulk joint shows up first, as dark, soft wood.
And on the 22% built in the 1960s and 1970s
The bottom of the wall. Panel siding that runs down close to the ground soaks up water and snowmelt, and the rim joist and sill plate behind it rot unseen. On a converted camp, check whether there is any sheathing at all before anyone prices new siding as a simple swap.
Neighborhoods
We work across Bailey Island, Orr's Island, Cundy's Harbor, Harpswell Neck, Sebascodegan Island, Harpswell Center, East Harpswell, North Harpswell, South Harpswell, West Harpswell and Dyer Cove.
Historic districts
Harpswell has 1 listed: Auburn-Harpswell Association Historic District. A National Register listing on its own does not limit what you fit; a local district or landmark designation can, and in several towns here a change of siding material or window sash needs a certificate before the permit. Which towns' rules bind, and how.
Next door
Harpswell shares a boundary with Brunswick, West Bath, Phippsburg, Freeport, Chebeague Island, New Meadows River and Casco Bay.

The rules in Harpswell
Siding replacement Permit required
Yes. Harpswell's 2025 permit flyer says permits are required to enlarge, alter, repair, renovate, remodel or update any existing structure, and lists additions, remodels and replacements as needing one. Siding is not named on its own, but a re-side is a replacement.
Window replacement, same opening Permit required Enlarging or cutting an opening Permit required
The flyer names it outright: window replacement and exterior door replacement require a permit.
Maine sets this, not Harpswell: U-0.30 or lower
With 5,031 residents in the 2020 Census, Harpswell is over the 4,000 mark at which Maine requires a town to enforce the state's building and energy code.
That is the 2021 energy code’s window figure, with no solar heat gain limit.
ENERGY STAR’s own figure here is U-0.22 or lower with an SHGC of 0.17 or higher, stricter than any code edition in force. When the code applies to a replacement window, and when it does not.
What the permit costs
Work started without a valid permit is charged triple the normal fee, with a $250 minimum.
Local quirks
The Code Enforcement Officer's inspection notice lists exterior weather-resistant siding and glazing among the items checked at the final inspection, which every permit needs; schedule it at least 2 days ahead.
Who to call
- Building dept
- 207-833-5771
- Official
- Tim Clark, Code Enforcement Officer and Local Plumbing Inspector; Tony Simmons, Code Enforcement Officer and Local Plumbing Inspector
- Permits
- Department page




How Harpswell compares with its neighbors
| Place | Permit to re-side | Permit for a window | Window must meet |
|---|---|---|---|
| Harpswell | Yes | Yes | U-0.30 |
| Brunswick | No | Not published | U-0.30 |
| West Bath | Yes | Yes | U-0.30 |
| Phippsburg | Depends | Depends | U-0.30 |
| Freeport | Depends | Depends | U-0.30 |
| Harrison | Not published | Not published | U-0.30 |
| Naples | Not published | Not published | U-0.30 |
All 25 Cumberland County places side by side →
Work we have done in Harpswell
No completed job in Harpswell on the books yet, and we would rather say so than invent one.
Common questions about Harpswell
When were most of the homes in Harpswell built?
Do I need a permit to re-side a house in Harpswell?
What U-factor does a replacement window need in Harpswell?
Does Harpswell have historic districts that limit window or siding choices?
How much is a building permit in Harpswell?
Where these facts came from
Sources: harpswell.maine.gov · harpswell.maine.gov · harpswell.maine.gov · harpswell.maine.gov · harpswell.maine.gov · harpswell.maine.gov · harpswell.maine.gov · harpswell.maine.gov · harpswell.maine.gov · harpswell.maine.gov · maine.gov · legislature.maine.gov

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