Window Replacement in Casco, Maine

Casco has a newer housing stock than most of the county, but many of its windows still need replacing. Cottages built for summer use often have single-pane sashes, old aluminum sliders or windows that were never sealed for winter, and those become a problem when an owner starts using the place into November or year-round. Houses from the 1980s and 1990s may have double-pane units whose seals have failed and fogged. Vinyl replacement windows, or wood and clad units from Andersen, Marvin, Pella and Integrity, bring those openings up to date.

Casco enforces the 2021 I-codes, which matter when a window serves a bedroom and must meet egress size, a common issue when a cottage loft or back room is turned into a legal bedroom. Casement windows can meet egress in openings where a double-hung cannot. For the older portion of the stock, built before 1978, federal EPA rules require lead-safe practices when paid work disturbs painted surfaces. Wind-driven rain off the lake makes proper flashing and sill pans important, especially on the Sebago shore. An owner measures each opening and prepares a fixed-price proposal.

Census estimates count about 2,970 housing units in Casco, with a median year built of 1988, noticeably newer than Raymond's 1976. Only about 5 percent predate 1940 and around 18 percent predate 1960, while roughly 31 percent have gone up since 2000. About 76 percent are single-family detached homes, a lower share than in neighboring Raymond, and about 90 percent of occupied homes are owned by the people living in them. Seasonal use is large: roughly 1,210 units, about four in ten, are held for seasonal or recreational occupancy, from shoreline cottages to second homes. The town also runs a short-term rental registration ordinance, since many lake houses are rented by the week. The older layer is small but real, including a Federal-style house from about 1795 in South Casco.

Casco was set off from Raymond in 1841 after starting as part of Raymondtown Plantation. Its settled places are Casco village, South Casco, Cook Mills, Crescent Lake and Pike Corner. The Friends Meetinghouse on Quaker Ridge Road, built in 1814, is a modest one-story frame building with narrow clapboard siding and is on the National Register, as is the Richard Manning House, a Federal-style home of about 1795 on Raymond Cape Road in South Casco. Sebago Lake State Park, opened in 1938, spans Casco and Naples, and summer camps such as Seeds of Peace and Camp Laurel South sit on its lakes. Casco Days fills the last Saturday of July.

Casco's Code Enforcement Department, which the town calls its building department, works from the town office at 635 Meadow Road and meets by appointment. Since April 7, 2025 the town enforces the 2021 I-codes under Maine's uniform building code. The building permit application asks whether a lot is in shoreland, water body, wetland or resource protection zoning, wants a plot plan with roadside and lakeside setbacks, and records lot coverage. Permits are valid for one year. Work in the shoreland zone, within 250 feet of a great pond, uses a separate Shoreland Project Permit Application with photos before and after construction.

A new window is only as good as the way it is set into the wall. Replacement windows go in either as inserts inside the existing frame or as full-frame units after the old frame comes out; the right choice depends on the condition of the frame, the trim you want to keep, and the siding around it. The site lists vinyl replacement windows and wood or clad units from Andersen, Marvin, Pella and Integrity, in double-hung, casement, picture, bay, sliding and awning styles.

• Each opening is measured and checked for rot in the sill, jambs and framing.
• Old sashes or whole frames come out; damaged wood is repaired before the new unit goes in.
• Units are set level, plumb and square, shimmed, and fastened as the manufacturer requires.
• Low-expansion foam and backer rod seal the gap without bowing the frame.
• Flashing, exterior trim or capping and interior casing are finished so the opening sheds water.

• Fog or condensation between the panes of insulated glass
• Sashes that stick, will not stay up, or let in drafts
• Soft or rotted sills and frames
• Single-pane glass or storm windows you take on and off every year
• Frost or ice on the inside of the glass in winter

• Number of windows, their sizes, and any custom shapes
• Vinyl versus wood or clad units, and the brand and series
• Insert versus full-frame replacement
• Glass package and grille options
• Interior and exterior trim work, and whether siding is open around the opening

Every job is priced from a free on-site visit. Typical ranges for the trade are on our window replacement page, and the details of this service are on the window replacement overview.

Back to the Casco exterior services overview, or see every town on our Cumberland County service areas page.