Commercial and retail pricing for fiberglass windows tracked across major U.S. distributors. Updated weekly.
Fiberglass Windows range from $78 to $1030 at retail pricing in 2026, with a median of $295. At commercial (contractor/trade) pricing, the range drops to $47 to $773 with a median of $199.
Most fiberglass windows purchased for commercial construction projects fall in the $107 to $337 range (25th to 75th percentile, commercial). Commercial pricing is typically 25-30% below retail, available through distributor trade accounts.
Size is a pricing factor for fiberglass windows. 24X36 offers the most affordable option at a median commercial price of $85. 18X36 commands the highest median at $521.
Mid-range options include 36X54 ($202), 24X64 ($232).
| Size | Products | Low | High | Median |
|---|---|---|---|---|
| 24X36 | 4 | $76 | $95 | $85 |
| 18X36 | 3 | $354 | $593 | $521 |
| 24X64 | 3 | $194 | $642 | $232 |
| 36X54 | 3 | $165 | $224 | $202 |
Origin affects fiberglass windows pricing. Turkish fiberglass windows offer the lowest median at $80, while European products command $577.
Other origins include USA ($210).
| Origin | Products | Low | High | Median |
|---|---|---|---|---|
| USA | 55 | $47 | $622 | $210 |
| Europe | 6 | $194 | $773 | $577 |
| Turkey | 3 | $50 | $89 | $80 |
These prices represent the market as we track it from distributor catalogs. Flume's procurement platform sources directly from manufacturers and leverages cross-project volume to deliver pricing 20-50% below the commercial rates shown here, without sacrificing product quality or specification compliance.
For details on how we calculate these prices, see our methodology. View all categories on the Price Index overview.
Fiberglass Windows range from $78 to $1030 at retail pricing in 2026, with a median of $295. At commercial (contractor/trade) pricing, the range is $47 to $773 with a median of $199.
Commercial fiberglass windows pricing is typically 25-30% below retail. The median retail price is $295 compared to $199 commercial. Contractors, builders, and trade accounts qualify for commercial pricing through distributor relationships.
Size has a measurable impact on fiberglass windows cost. 24X36 fiberglass windows have a median commercial price of $85, while 18X36 runs $521 median. Choosing the right size based on project requirements can meaningfully impact material budgets.
Yes. Turkish fiberglass windows have a median commercial price of $80, while European products run $577. Origin-based pricing differences reflect manufacturing costs, shipping, and tariffs.
Flume sources fiberglass windows directly from manufacturers and leverages cross-project volume to deliver pricing 20-50% below the commercial rates shown here. Submit your specs and quantities for a free quote. Results in 2-4 days with no commitment required.
Send us your fiberglass windows specs and quantities. We source directly from manufacturers and leverage cross-project volume for pricing 20-50% below distributor rates.