Renovating in Windham, ME
Windham is the lowest-cost market in the immediate Portland orbit. Crews come from Portland, Westbrook, and the Lakes Region, and open lots keep site costs low — but summer lake traffic on Route 302 genuinely affects scheduling and delivery windows.
Typical Windham project costs
| Project | Low | Likely | High |
|---|---|---|---|
| Kitchen remodel150 sq ft, mid-range finish | $45k | $62k | $82k |
| Bathroom remodel60 sq ft, mid-range finish | $23k | $31k | $43k |
| Roof replacement1,600 sq ft, mid-range finish | $74k | $124k | $198k |
| Home addition400 sq ft, mid-range finish | $121k | $165k | $220k |
| Basement finishing600 sq ft, mid-range finish | $36k | $56k | $82k |
| Whole-home renovation1,600 sq ft, mid-range finish | $229k | $317k | $440k |
| Deck building300 sq ft, mid-range finish | $15k | $25k | $40k |
| Siding replacement1,800 sq ft, mid-range finish | $74k | $124k | $198k |
| Garage addition480 sq ft, mid-range finish | $145k | $198k | $264k |
| Sunroom addition200 sq ft, mid-range finish | $60k | $82k | $110k |
Maine regional index with a 0.98× Windham metro factor, 10% contingency included. Budgeting estimates, not quotes.
Estimated range — based on BLS OEWS national average wages and BLS PPI material indexes applied to Our Haus baseline unit costs, as of June 2026. Estimates are shown as a range and help set expectations. They are not a quote, a verified price, or an appraisal of what a contractor will charge.
Housing stock and what it means for cost
A mix of year-round subdivisions, older capes and farmhouses along River Road, and Sebago-adjacent camps and cottages in Little Sebago and the Dundee Pond area. Seasonal camp conversions need full-envelope work: insulation, year-round heat, and freeze-protected plumbing.
Neighborhoods: North Windham, South Windham, Little Sebago, River Road, Dundee Pond.
Permits and contract rules
Authority: Town of Windham Code Enforcement Department
Building permit plus zoning review. Shoreland zoning around Little Sebago, Sebago Lake, and the Presumpscot is strictly applied and can prohibit expansion within setbacks outright. Most properties are on well and septic, so added bedrooms require septic capacity review first.
Maine requires a written contract for home-construction or repair work over $3,000. The contract must include the contractor's name and address, the work and materials, the total price, a payment schedule, start and completion dates, a warranty statement, and notice of the state's contractor-dispute mediation program. Maine does not license general contractors, so verify insurance directly with the carrier.
Season and scheduling
April through November for exterior work. Lake-area projects are far easier to run outside the July–August season, and shoulder-season pricing reflects that.
Check a Windham quote