

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


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 moreBath at a glance
- People
- 8,815
- Homes
- 4,796
- Size
- 9.1 square miles
- From downtown
- About 28 miles northeast
- ZIP codes
- 04530
- Founded or incorporated
- 1781
Bath is a small city on the west bank of the Kennebec River, about 12 miles up from the open ocean, known as the City of Ships; it became a town in 1781 and a city in 1847. Shipbuilding began here in 1743, Bath Iron Works has built hundreds of ships, mostly for the Navy, and many of the older neighborhoods were built during the shipbuilding boom. The older core is a National Register district, and a city historic overlay zone reviews some exterior changes there.
The houses in Bath
79% of the homes in Bath are older than 1980 and 57% older than 1940; the median one dates from 1939 or earlier; 60% are detached houses and 64% of occupied homes are owner-occupied. 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.
Owners here put the median home's value at about $310,900, and 54% of homes have three bedrooms or more — each bedroom needs an emergency escape opening under the egress rule.
Half the homes in Bath were built before 1938, which makes its housing about 39 years older than across Sagadahoc County as a whole (median 1977). Set against Sagadahoc County as a whole, owners live in 64% of occupied homes here against 78% county-wide, the median owner-estimated value is $310,900 here and $333,300 across the county and detached houses are 60% of the homes, below the county's 75%.
- Rooms in the median home
- 5.8
- Heated with gas / electricity
- 6% / 20%
- Townhouses and other attached homes
- 4%
- Homes in buildings of 2 to 4 units
- 16%
- Homes in buildings of 5 or more units
- 21%
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.
The South End is the older residential area with early 1800s houses, the North End holds the densest mix of 19th-century homes built by prospering shipbuilders, many Greek Revival and Italianate, and Washington Park was built as housing for shipyard workers during World War I.
What that vintage turns up
The largest group of homes in Bath, 57% of them, was built before 1940, so that is the house described here.
The originals are wood double-hung sashes on cords and weights: small panes on the capes and farmhouses, two-over-two or one-over-one on the Victorian, Italianate and Greek Revival houses of the shipbuilding and mill towns. Many now sit behind an aluminum storm window added decades later. The sash wood is usually old-growth and sound; the putty, the sill paint and the cords are what give out. A tuned-up sash with a tight storm in front of it is a real alternative to replacement on these houses, and inside a local historic district it is often the one the review expects.
Painted wood clapboards on the street walls, and cedar shingles on the sides, the ells and every surface of the Shingle-style summer houses along the coast, all nailed straight to board sheathing. In the cities a good share of these are two- and three-family houses. Plenty were later wrapped in asbestos-cement shingles, aluminum or vinyl to stop the painting; underneath is either clapboard worth restoring or soft bottom courses where winter snow banked against the wall for decades.
The one to watch on a house of this age
Nothing behind the boards sheds water: no house wrap and no flashing at the window heads, only paint and trim. A new window set into that wall needs a sill pan and head flashing improvised into old framing, so ask how the installer will lap it before you compare prices.
Neighborhoods
We work across Downtown, North End, South End and Washington Park.
Historic districts
Bath has 4 listed: Bath Historic District, Trufant Historic District, Washington Park Historic District and Historic Overlay District (local). 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
Bath shares a boundary with Woolwich, Arrowsic, West Bath, Phippsburg, Brunswick and Kennebec River.

The rules in Bath
Siding replacement Conditional
Only where the work alters the structure. Bath's Land Use Code (adopted September 2, 2026) says a building or part of one may not be constructed, structurally altered, enlarged, moved or demolished until the Code Enforcement Officer issues a building permit, and neither the code nor the city's permit pages name siding.
Window replacement, same opening Conditional Enlarging or cutting an opening Permit required
A same-size window is not named; a new or enlarged opening alters the framing and needs a permit.
Maine sets this, not Bath: U-0.30 or lower
With 8,766 residents in the 2020 Census, Bath 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
Permits taken out after work has begun cost five times the normal fee, and an inspection deposit of $100 or half the permit fee, whichever is greater, is paid with the application and returned after final approval.
Local quirks
Inside Bath's Historic Overlay District, altering or covering exterior architectural details needs Historic District Review before a building permit, and the city's code asks for original materials to be kept or repaired where possible and replaced with the same material, or a substitute of the same color, shape, size and texture, so a re-side or new windows on a building there should start with a call to the city about that review.
Who to call
- Building dept
- 207-443-8334
- Official
- Adam Jones, Code Enforcement Officer
- Permits
- Department page




How Bath compares with its neighbors
| Place | Permit to re-side | Permit for a window | Window must meet |
|---|---|---|---|
| Bath | Depends | Depends | U-0.30 |
| Woolwich | Not published | Not published | U-0.30 |
| Arrowsic | Not published | Not published | U-0.30 |
| West Bath | Yes | Yes | U-0.30 |
| Phippsburg | Depends | Depends | U-0.30 |
| Brunswick | No | Not published | U-0.30 |
| Bowdoin | Not published | Not published | U-0.30 |
All 10 Sagadahoc County places side by side →
Work we have done in Bath
We have not logged a finished job in Bath yet. When we do, it will be listed here with what was done — we would rather show nothing than a number you cannot check.
Common questions about Bath
What age of house is typical in Bath?
Does Bath require a permit for new siding or windows?
How energy-efficient does a new window have to be in Bath?
Does Bath have historic districts that limit window or siding choices?
What does a permit cost in Bath?
Where these facts came from
Sources: cityofbathmaine.gov · cityofbathmaine.gov · cityofbathmaine.gov · cityofbathmaine.gov · cityofbathmaine.gov · cityofbathmaine.gov · cityofbathmaine.gov · cityofbathmaine.gov · cityofbathmaine.gov · cityofbathmaine.gov · maine.gov · legislature.maine.gov

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