Fiberglass Windows Cost (2026)
The durable, low-maintenance upgrade over vinyl. Fiberglass frames are strong, stable across temperature swings and can be painted, splitting the difference between vinyl's value and wood's looks at a mid-to-high price.
Fiberglass Windows cost estimate
| Item | Estimated range |
|---|---|
| Typical 10-window home | $7,000 – $16,000 |
| Per window installed | $700 – $1,500 |
Ranges are national estimates. Use the calculator for a figure adjusted to your project and city.
Where your money goes
For a $11,500 fiberglass windows, the bill breaks down roughly as below. Shares are trade-typical estimates and shift with equipment, home and region.
| Cost component | Share | Est. amount |
|---|---|---|
| Windows & frames | 55% | $6,300 |
| Labor & installation | 30% | $3,400 |
| Trim, flashing & disposal | 8% | $900 |
| Permits & overhead | 7% | $800 |
What drives the price
- Number and size
- Glass package
- Color and finish
- Full-frame vs insert
Pros
- Very durable and dimensionally stable
- Low maintenance, paintable
- Strong energy performance
Cons
- Costs more than vinyl
- Fewer installers carry them
- Less high-end than real wood
Typical lifespan: 30–50 years
What the price usually includes
- Removal and disposal of old windows
- New windows and frames
- Insulation and flashing around each opening
- Interior and exterior trim
- Caulking and weather-sealing
- Haul-away and cleanup
- Manufacturer and labor warranties
How to save
- Replace all windows at once for a per-unit discount
- Choose vinyl for the best value
- Look for ENERGY STAR and local utility rebates
- Use insert (pocket) replacement where the existing frames are sound
- Get three itemized bids
- Schedule in the off-season
Estimate your window replacement cost
Enter your window count and city for a range specific to you.
Frequently asked questions
How much does fiberglass windows cost?
A typical 10-window home runs about $7,000 to $16,000 installed, depending on size, your home and local labor rates.
How long does fiberglass windows last?
About 30–50 years with proper installation and maintenance.