Most window problems in New Jersey homes are repairs, not replacements: fogged or cloudy double-pane glass is a failed seal and costs $250 to $700 to swap just the glass unit; a stuck or drafty sash usually needs $150 to $400 of new balances, weatherstripping and a tune-up; a rotted sill can often be repaired for $250 to $900. Call (201) 676-3099 or book a free estimate.
Most window problems in New Jersey homes are repairs, not replacements: fogged or cloudy double-pane glass is a failed seal and costs $250 to $700 to swap just the glass unit; a stuck or drafty sash usually needs $150 to $400 of new balances, weatherstripping and a tune-up; a rotted sill can often be repaired for $250 to $900. Replace the whole window when the frame is rotted through, when it is original single-pane glass, when parts are no longer made, or when you are fixing more than half the windows in the house anyway.
Here is how to tell which one you have, with 2026 prices for each.
The problem, and the honest fix
| What you see | What it is | Repair or replace? | Typical NJ cost, 2026 |
|---|---|---|---|
| Fog, haze or moisture between the panes | Failed seal on the insulated glass unit (IGU) | Repair: replace the glass unit only | $250 – $700 per window |
| Window will not stay up, or slams down | Broken balances (the springs in the frame) | Repair | $150 – $350 |
| Drafts around the sash, rattles | Worn weatherstripping, loose sash | Repair: weatherstrip and adjust | $120 – $300 |
| Cracked glass, single pane | Just glass | Repair | $150 – $400 |
| Soft or crumbling wood at the sill or bottom of the sash | Rot from water sitting on the sill | Repair if it is under about a third of the sill; replace if the frame is soft | Repair $250 – $900; replace $1,000 – $3,200 |
| Original single-pane wood windows with storms | 1920s – 1960s windows, no insulated glass | Usually replace; restore only if the wood is sound and you love them | Replace $1,000 – $3,200 each |
| Aluminum single-pane sliders from the 1970s | Cold, condensation, no thermal break | Replace | $650 – $1,900 each |
| Vinyl windows from the 1990s, sashes warped, hard to lock | Cheap vinyl at end of life, parts unavailable | Replace | $650 – $1,900 each |
| Condensation on the inside of the glass in winter | Humidity in the house, not the window | Neither: fix the humidity (bath fans, humidifier setting) | $0 – $600 |
| Peeling paint, ugly but working | Cosmetic | Repair: scrape, prime, paint | $100 – $250 per window |
Fogged glass: the repair most companies will not tell you about
Cloudiness between the panes means the seal on the insulated glass unit failed and moisture got in. The frame, sash and hardware are fine. The fix is a new glass unit made to the exact size, dropped into the existing sash, at $250 to $700 depending on size and whether it is low-E or tempered. A window company that only sells windows will quote you a $1,400 replacement for this. Ask for the glass unit price first. The exception is a very old or cheap window where the sash itself is warped; then the glass is money into a frame that is failing.
When replacing is really the answer
- Rot has reached the frame, not just the sill or the sash bottom. Press a screwdriver into the wood at the corners; if it sinks in, the frame is done.
- Single-pane glass. Even a restored wood window with a good storm loses far more heat than a modern double-pane unit. If the house has 15 of them, replacement pays back in comfort and bills.
- Parts are gone. Many 1980s and 1990s vinyl and aluminum windows have no balances, locks or glass stops available anymore.
- You are doing more than half the windows. Mixing five new windows with ten old ones costs more per window and looks patchy; do the house in one job at a per-window price.
- Lead paint on pre-1978 wood windows that opens and closes: the friction makes dust. Replacement, done with proper lead-safe practices, removes the hazard.
Insert vs full-frame replacement
An insert (pocket) window slides into the existing frame and keeps the trim inside and out: $650 to $1,400 for vinyl. A full-frame replacement removes everything down to the rough opening, adds new flashing and insulation, and is the right call when there is any rot or water damage: $1,000 to $1,900 for vinyl, $1,200 to $3,200 for fiberglass or wood-clad. If a company quotes inserts on a window with a rotted frame, they are putting a new window into a rotten hole.
Drafts: is it really the window?
Before spending $20,000 on windows for drafts, hold a lit incense stick near the window on a windy day. Smoke pulled at the sash means weatherstripping. Smoke pulled at the edge of the trim means the gap between the frame and the wall was never insulated, which is a $100 foam-and-caulk fix per window. Smoke pulled at the outlet on the same wall means the wall, not the window. Window companies do not tell you this part.
How we handle it
We repair windows and we replace them, so we have no reason to push one. The free visit ends with two written prices when both make sense: the repair, and the replacement. Half the calls we get for 'new windows' end with new glass units and a tune-up for a fifth of the money.
Questions people ask next
Can foggy double-pane windows be fixed?
Yes. The insulated glass unit is replaced with a new one made to size, keeping the frame and sash. $250 to $700 per window in New Jersey. Defogging services that drill the glass are a temporary fix at best.
How do I know if my windows need to be replaced?
Rot in the frame, single-pane glass, parts no longer available, or more than half the windows failing at once. Fog, drafts, stuck sashes and cracked glass are repairs.
How much does it cost to replace one window in New Jersey?
$650 to $1,400 for a vinyl insert, $1,000 to $1,900 for a vinyl full-frame, and $1,200 to $3,200 for fiberglass or wood-clad. Bay and bow windows are $4,000 to $10,000.
Is it worth repairing old wood windows?
If the wood is sound and the house is historic, restoring them with new weatherstripping and good storms can be worth it. If they are single-pane, rotted, painted shut and you have 15 of them, replacement usually wins on comfort, bills and maintenance.
Why is there condensation on the inside of my windows?
Indoor humidity, not a window defect. Run bathroom fans, turn the humidifier down, and check that the dryer vents outside. Condensation between the panes is different; that is a failed seal.
Need window repair and replacement near you?
If you searched “window repair and replacement near me” anywhere in New Jersey, that's us. First Call Contracting is based in Paramus and sends its own licensed crew to all 21 counties — written price before work starts, no deposit, a real person on the phone 24/7.
Not sure if it is a repair or a replacement?
Free visit. We give you a written price for both when both make sense, and we tell you which one we would do at our own house.
Or call Alex direct: (201) 676-3099