Replacing the glass in one window usually runs a few hundred dollars. HomeGuide puts the average at $300 to $650 per window, with small single panes as low as $150 and large or specialty glass past $1,500. This Old House lands in a similar place, at $300 to $880 installed with a national average around $375.
The spread comes down to size, how many panes the unit has, the glass type and how fast you need it. A cracked single pane in an old wood sash is a very different job from a fogged, sealed double pane unit in a vinyl window.
At TurnKey Window we’ll tell you whether new glass, a sash or a whole window is the better spend. Reach out for a free consultation or call (504) 226-6201, and use the numbers below to check any quote you get.
Key takeaways
- HomeGuide’s average range is $300 to $650 per window, and This Old House puts the national average near $375.
- Size is usually the biggest price driver, followed by pane count and glass type.
- Double and triple pane windows use sealed units, so you replace the whole insulated glass unit rather than one sheet.
- Large, low panes near walkways and glass near tubs and showers have to be safety glass under the residential code, which raises the price.
- Rotted or warped frames change the math. New glass in a failing frame is money poorly spent.
Average window glass replacement cost by size
Bigger glass costs more to make, and big panes often need two people to handle safely. HomeGuide’s size table shows how quickly the price climbs.
| Window size | Typical dimensions | HomeGuide cost range |
|---|---|---|
| Small | Under 24 by 24 inches | $150 to $350 |
| Medium | 24 by 36 to 30 by 48 inches | $350 to $600 |
| Large | 48 by 60 inches or larger | $600 to $1,200 and up |
| Extra large or picture | Varies | $1,200 to $2,800 and up |
| Custom shapes | Arches, circles, hexagons | $700 to $1,800 and up |
HomeGuide also notes that second and third story windows can add $150 to $400 for equipment or extra crew. Emergency calls on nights, weekends or holidays often carry a 50 to 100 percent premium over standard rates.
Prices for common glass sizes
This Old House lists replacement pricing for a handful of standard glass sizes, which is handy for checking a quote on a common window.
- 24 by 36 inches: $130 to $180.
- 30 by 36 inches: $160 to $270.
- 36 by 42 inches: $320 to $420.
- 46 by 46 inches: $380 to $520.
- 46 by 54 inches: $650 to $810.
Measure the glass itself, not the whole window, before you compare. A quote well above these ranges for a plain, standard size deserves a question about what’s included.
Cost by number of panes
The number of panes matters too, because it changes what’s being replaced. An old single pane sash takes a cut sheet of glass and fresh glazing. A modern double pane window takes a factory sealed insulated glass unit, often called an IGU.
- Single pane: $150 to $400, per HomeGuide.
- Double pane: $300 to $800.
- Triple pane: $500 to $1,200.
This Old House makes the same point in plain terms: modern double and triple pane windows usually need the entire sealed unit replaced rather than one pane. HomeGuide adds a warning worth hearing before you order. If the window is old or discontinued, a compatible unit may not be available, which pushes you toward a new sash or window.
Cost by glass type
Once you know the size and pane count, the glass itself sets the rest of the price. Here’s how HomeGuide breaks it down, for replacement glass installed.
| Glass type | HomeGuide cost range | What you get |
|---|---|---|
| Float | $200 to $500 | Standard clear glass with little insulation |
| Tempered | $300 to $750 | Heat treated safety glass that breaks into small pieces |
| Laminated | $300 to $750 | A plastic layer holds the glass together if it breaks, and it cuts noise |
| Frosted | $300 to $800 | Privacy with light |
| Low E | $350 to $950 | A coating that reflects heat while letting light through |
| Argon filled | $400 to $900 | Insulated double pane with argon gas between the panes |
| Krypton filled | $450 to $1,100 | Better insulation than argon in thin gaps |
If you’re replacing a sealed unit anyway, it’s often the cheapest moment to move up to low E or a gas fill. You’re paying for the labor either way.
When the code requires safety glass
Some window locations have to use safety glazing, and that adds cost. HomeGuide puts the tempered glass upcharge at $100 to $300 on a large or extra large window.
Louisiana adopted the 2021 International Residential Code as its statewide minimum code effective January 1, 2023, according to ICC NTA. In that code, section R308.4.3 treats window glass as a hazardous location when all four of these are true.
- A single pane has more than 9 square feet of exposed glass.
- The bottom edge sits less than 18 inches above the floor.
- The top edge sits more than 36 inches above the floor.
- A walking surface is within 36 inches of the glass, measured horizontally.
Section R308.4.5 covers glass near tubs, showers, hot tubs and pools. Glass there counts as hazardous when its bottom edge is less than 60 inches above a standing or walking surface, unless it sits more than 60 inches horizontally from the water’s edge.
Code section R308.1 also requires each safety pane in those spots to carry a permanent mark, etched or fired into the glass, naming the glass type and standard. If you’re replacing glass in a bathroom or a big low window, look for that mark on the old pane and expect it on the new one. Your local permit office has the final word on how the code applies to your house.
What labor adds to the bill
HomeGuide says labor makes up 30 to 60 percent of the total, with most contractors charging $50 to $125 an hour. A typical window takes 1 to 3 hours, and some pros price by the window at $100 to $300 or more for labor alone.
- Many contractors have a minimum charge of $100 to $150 or more, so one small pane can cost more than you’d expect.
- Old glass removal is usually included, but disposal can add $50 to $100 if it’s not.
- Custom glass can take 2 to 6 weeks to fabricate, and custom sizes often can’t be returned, so let a pro take the final measurements.
Signs the glass needs replacing
A broken pane is obvious. Other glass problems creep up, and HomeGuide lists several that point toward replacement.
- Cracks or chips that are spreading across the pane.
- Condensation or fog between the panes of a double or triple pane window, which points to a failed seal.
- Drafts around the glass that you can feel on a cold or windy day.
- Damage from storms, accidents or an attempted break in.
Fogging between the panes won’t wipe off, because it’s inside the sealed unit. That’s a replacement job for the unit rather than a cleaning job.
Repairing a crack vs replacing the glass
Not every crack means new glass. This Old House lists resin repair for small cracks at $100 to $500. It also prices reglazing, where the putty holding the glass is replaced, at $250 to $500 per window.
Resin is a cosmetic fix for a small crack that isn’t spreading. A crack that runs edge to edge, a shattered pane or glass that moves in the frame needs replacing, both for safety and for the seal.
Handling broken glass safely
Until the repair, keep kids and pets away from the window and wear heavy gloves and eye protection if you have to touch it. Tape the crack and cover the opening from outside with plastic or plywood if rain is coming.
Don’t try to pull large shards out of an upper floor sash from a ladder. That combination of sharp edges and height is exactly where a professional earns the fee.
When glass isn’t the real problem
New glass only makes sense in a sound frame. HomeGuide notes that glass only replacement usually costs 30 to 70 percent less than a full window, and it preserves original woodwork in historic homes.
If the frame is rotted, warped or damaged, HomeGuide recommends replacing the whole window, which it puts at $450 to $1,500 per window on average. This Old House lists frame repair at $175 to $300 for wood, $250 to $500 for aluminum and $300 to $600 for vinyl or fiberglass, which can be a middle path.
- Replace the glass when the frame and sash are solid and the window opens, closes and locks the way it should.
- Replace the sash when the glass unit isn’t available but the frame is still sound.
- Replace the window when the frame is soft, the unit is drafty, or you’re facing several failures at once.
Our window repair service covers glass and sash work, and our window replacement page walks through the full swap if the frame is too far gone.
Frequently asked questions
How much does it cost to replace a single pane of window glass?
HomeGuide puts single pane glass replacement at $150 to $400, depending mostly on size. Watch for contractor minimums of $100 to $150 or more on very small jobs.
Can you replace just the glass in a double pane window?
Yes, in most cases, but you replace the whole sealed insulated glass unit, not one sheet. HomeGuide prices double pane glass replacement at $300 to $800, and older or discontinued windows may not have a matching unit available.
Is it cheaper to replace the glass or the whole window?
Glass is usually cheaper. HomeGuide says glass only replacement typically costs 30 to 70 percent less than a new window, which it puts at $450 to $1,500 per window, as long as the frame is in good shape.
How long does window glass replacement take?
HomeGuide says 1 to 3 hours per window for the install itself. Custom glass may need 2 to 6 weeks to be made before that visit.
Does low E or argon glass cost more to replace?
Yes, somewhat. HomeGuide lists low E replacement glass at $350 to $950 and argon filled glass at $400 to $900, against $200 to $500 for plain float glass, and both improve how well the window holds back heat.
Get a straight answer on your broken glass
A cracked pane is a fixable problem, and the right fix depends on the frame around it. Send us a photo and a rough size through our contact page, or call (504) 226-6201 for a free consultation.