Fiberglass Windows Prices in 2026
Commercial and retail pricing for fiberglass windows tracked across major U.S. distributors. Updated weekly.
How much do fiberglass windows cost?
Fiberglass Windows range from $88 to $707 at retail pricing in 2026, with a median of $258. At commercial (contractor/trade) pricing, the range drops to $53 to $530 with a median of $174.
Most fiberglass windows purchased for commercial construction projects fall in the $84 to $333 range (25th to 75th percentile, commercial). Commercial pricing is typically 25-30% below retail, available through distributor trade accounts.
Fiberglass Windows prices by size
Size is a pricing factor for fiberglass windows. 12X18 offers the most affordable option at a median commercial price of $59. 48X74 commands the highest median at $650.
Options span a wide range: 22X37 sits at $151 median while 19X45 runs $258.
| Size | Low | High | Median |
|---|---|---|---|
| 24X36 | $72 | $183 | $85 |
| 36X60 | $96 | $239 | $135 |
| 12X48 | $188 | $234 | $211 |
| 27X45 | $416 | $530 | $530 |
| 32X48 | $108 | $147 | $121 |
| 36X48 | $106 | $132 | $119 |
| 11X14 | $239 | $331 | $298 |
| 12X18 | $53 | $66 | $59 |
| 20X20 | $122 | $252 | $213 |
| 22X37 | $135 | $168 | $151 |
| 24X38 | $147 | $244 | $219 |
| 24X60 | $121 | $151 | $136 |
| 30X42 | $237 | $296 | $267 |
| 36X42 | $231 | $289 | $260 |
| 48X74 | $650 | $650 | $650 |
| 16X32 | $297 | $492 | $396 |
| 19X45 | $229 | $287 | $258 |
| 23X36 | $120 | $150 | $135 |
| 24X64 | $194 | $316 | $225 |
| 30X53 | $138 | $471 | $187 |
| 40X96 | $96 | $214 | $192 |
| 18X36 | $229 | $530 | $398 |
| 1X72 | $61 | $95 | $68 |
| 24X56 | $127 | $394 | $354 |
| 38X62 | $198 | $247 | $223 |
Fiberglass Windows prices by origin country
Origin affects fiberglass windows pricing. Chinese fiberglass windows offer the lowest median at $56, while European products command $334.
Other origins include Turkey ($80), USA ($171).
| Origin | Low | High | Median |
|---|---|---|---|
| USA | $57 | $530 | $171 |
| Europe | $120 | $530 | $334 |
| Turkey | $53 | $450 | $80 |
| China | $53 | $62 | $56 |
How Flume helps with fiberglass windows procurement
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.
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Explore other categories
For details on how we calculate these prices, see our methodology. View all categories on the Price Index overview.
Frequently asked questions
Fiberglass Windows range from $88 to $707 at retail pricing in 2026, with a median of $258. At commercial (contractor/trade) pricing, the range is $53 to $530 with a median of $174.
Commercial fiberglass windows pricing is typically 25-30% below retail. The median retail price is $258 compared to $174 commercial. Contractors, builders, and trade accounts qualify for commercial pricing through distributor relationships.
Size has a measurable impact on fiberglass windows cost. 12X18 fiberglass windows have a median commercial price of $59, while 48X74 runs $650 median. Choosing the right size based on project requirements can meaningfully impact material budgets.
Yes. Chinese fiberglass windows have a median commercial price of $56, while European products run $334. 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.
Get fiberglass windows below commercial pricing
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.