Basic
$2,084 – $5,001 each
Fiberglass bay with fixed center and two double-hung flankers, white frames, low-E double-pane glass, insulated seat, cable support, primed boards
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How Much Does Fiberglass Bay Window Cost in Portland, Maine?
Replace or install one fiberglass bay window unit (three-panel projection), including installation, trim and support.
Fiberglass Bay Window in Portland, Maine typically costs $2,451 to $5,883 each as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Fiberglass Bay Window in Portland, Maine
$2,451 – $5,883
eachPrices in Portland are 1.0% lower than the national average for fiberglass bay window.
National average: $2,500 – $6,000 each
What you get at each price level
Standard
$2,451 – $5,883 each
Fiberglass bay with fixed center and two double-hung flankers, tan frames, low-E argon glass, insulated seat, cable support, primed boards
Rendering: BuildX
Find a pro to do thisPremium
$3,064 – $7,354 each
Fiberglass bay with fixed center and two double-hung flankers, dark exterior frames, low-E argon glass, wood-look interior finish, insulated seat, cable support
Rendering: BuildX
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Cost Breakdown in Portland
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $1,091 – $2,619 | each |
| Labor | labor | $875 – $2,100 | each |
| Supplies & Other | supplies | $291 – $698 | each |
| Equipment & Disposal | equipment | $194 – $466 | each |
Prices adjusted for Portland local market conditions.
Cost Factors in Portland, Maine
What Affects Pricing
- Materials ($1,125.00-$2,700.00 per unit)
- Labor ($875.00-$2,100.00 per unit)
- Supplies & Other ($300.00-$720.00 per unit)
- Equipment & Disposal ($200.00-$480.00 per unit)
Local Price Adjustments
Material costs3.0% below avg
Labor costsAt national average
Frequently Asked Questions
References
- Pella: Bay Window Replacement, pella.com, retrieved Nov 2026
- Windows by Toll: Bay Window Replacement Costs, windowsbytoll.com, retrieved Nov 2026
- EcoWatch: Bay Window Cost 2026, ecowatch.com, retrieved Nov 2026
- Construction wages by metro and rural area, used for the labor adjustment by ZIP code, U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025
- Regional price parities for goods, used for the materials adjustment by ZIP code, U.S. Bureau of Economic Analysis, 2024
Get Free Estimates in Portland
Connect with local fiberglass bay window contractors in Portland for personalized quotes based on your specific project.