Window Problems Home Inspectors Flag — and How to Fix Them Before You Sell
What each common window item on an inspection report means, what it typically costs to fix, and what to handle first.
By Local Window Service · Published · 6 min read
Windows show up on almost every home inspection report. The good news for sellers: most window items are small, fixable problems — and fixing them usually costs far less than the credit a buyer will ask for.
Inspectors don't "pass" or "fail" a house. They note conditions, and buyers use the report to negotiate. Below are the window problems inspectors flag most often, what each one means, what fixing it typically costs, and which ones to handle first.
The Window Problems Inspectors Flag Most
1. Foggy glass (failed seals)
Fog, haze or streaks between the panes of a double-pane window mean the seal on the insulated glass unit has failed. Inspectors note it because the window has lost much of its insulating value. The fix is replacing the glass unit, not the window — typically $300–$800 per window. Foggy window repair →
2. Rot at sills and sashes
Inspectors probe the wood at sills, the bottom of sashes and the lower corners of frames. Soft or crumbling wood gets written up because rot spreads and can let water into the wall. Localized rot is cut out and rebuilt with matched wood, typically $200–$700 per window. Rotted window repair →
3. Windows that won't open, stay open or lock
This one matters most for safety. Bedroom windows are emergency escape routes, so a painted-shut or stuck window is usually flagged, as is one that slams down or won't lock. Freeing a sash or replacing worn balances typically runs $150–$350; locks and latches $75–$500. Window sash repair →
4. Cracked or broken glass
Any cracked pane gets noted. Glass in and next to doors is also checked for safety glazing — if it isn't tempered, it may be flagged even when intact. Replacement glass typically runs $300–$800. Window glass replacement →
5. Water stains and leaks
Stains on the wall or sill below a window suggest water is getting in. Often the cause is failed caulk or weatherstripping ($100–$350 to reseal); sometimes it's flashing or siding above the window, which is a different trade. Knowing which it is before listing avoids surprises. Leaking window repair →
6. Missing or torn screens
Minor, but it makes the house look neglected in photos and walkthroughs. Rescreening typically costs $40–$120 per screen. Window screen repair →
7. Drafty windows
Inspectors may note worn weatherstripping or visible gaps. Replacing weatherstripping typically runs $100–$300 per window.
Fix Before Listing, or Offer a Credit?
There's no single right answer, and your real estate agent knows your market best. But small, visible repairs — a foggy unit, a rotted sill, a window that won't stay open — often cost less to fix than the discount buyers request once they see them on a report.
Larger items are more often negotiated. Either way, knowing the real repair cost puts you in a stronger position.
What to Fix First
- Safety: windows that won't open or lock, and broken or non-tempered door glass.
- Water: rot and leaks, because they get worse and raise questions about hidden damage.
- Efficiency and appearance: foggy glass, drafts and screens.
Get a Quick Pre-Listing Check
Send us photos of the windows in question — or the window items from your inspection report — and we'll tell you what each one needs and roughly what it costs. Grouping all the repairs into one visit keeps the cost per window down. See typical prices in our window repair cost guide.
- Sill — water and snow sit here longest, so paint fails first.
- Bottom rail of the sash — water runs down the glass and soaks into it.
- Lower ends of the frame and trim — end grain wicks up water where they meet the sill.
- Glazing joint — cracked putty lets water into the joint between glass and wood.
Rot usually stays in these zones — which is why it can be cut out and rebuilt.
Fix the Window. Keep the Money.
Call, text, or send a photo. You'll know what's wrong and roughly what it costs — before anyone comes out.
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