Window Repair Cost 2026: $75–$400 by Problem Type

Frequently Asked Questions

How much does window repair cost?

Window repair costs by type: foggy double-pane glass (IGU replacement only) $150–$400 per sash; broken window balance or sash cord $100–$200; rotted wood sill repair $150–$500; crank/operator replacement $75–$200; lock or latch replacement $50–$150; weatherstripping replacement $75–$150; window reglazing (single-pane putty) $50–$150. Labor runs $75–$150/hr. Most window repairs fall in the $100–$350 range — worth doing on quality windows under 15 years old.

Can foggy double-pane windows be repaired?

Yes — by replacing the insulated glass unit (IGU), not the entire window. The IGU (the sealed glass assembly) can be removed and replaced while keeping the existing frame and sash. IGU replacement costs $150–$400 per sash depending on size and glass type. This is significantly cheaper than full window replacement ($300–$800 per window). The fog is caused by failed seals allowing moisture into the space between panes — it's a comfort and efficiency issue but not structural. IGU-only replacement makes sense when the frame and sash are in good condition.

When should I repair vs. replace windows?

Repair if: the frame is structurally sound, the issue is cosmetic or mechanical (foggy glass, broken lock, bad weatherstripping), the window is under 20 years old, and repair cost is less than 50% of replacement cost. Replace if: the frame is rotted or structurally compromised, multiple seals have failed throughout the house, the window is a single-pane unit in a climate that benefits from double-pane, or the window style is outdated and you're remodeling. Energy-efficient replacement windows can pay back in 7–15 years in HVAC savings if replacing single-pane originals.

How much does it cost to fix a rotted window sill?

Rotted wood window sill repair costs $150–$500 depending on extent. Minor rot (surface only, less than 30% of sill): remove rot, treat with epoxy wood hardener and filler ($75–$200 DIY-able). Moderate rot (one section): sister in new sill material or replace the sill board ($200–$400 professionally). Extensive rot spreading to the rough opening framing: may require window removal, framing repair, and reinstallation ($400–$1,200+). Rot spreads — catching it at the surface stage prevents the much more expensive structural repair. Annual painting or caulking inspection prevents this entirely.

How much does weatherstripping replacement cost?

Window weatherstripping replacement costs $75–$200 professionally, or $10–$50 in DIY materials for a standard double-hung window. Weatherstripping is the foam, rubber, or pile seal around the window sash that prevents air infiltration. Signs it needs replacement: cold drafts, rattling windows, visible gaps, or condensation on the interior sill. Replacing weatherstripping typically reduces window air leakage 50–80%. For older homes, window weatherstripping is often the cheapest air sealing improvement with the fastest payback.

What is the most common window repair?

The most common window repairs by frequency: (1) Foggy double-pane glass — failed IGU seals let moisture in, creating the fog. Very common in windows 10–20 years old. (2) Broken balance or sash cord — single-hung and double-hung windows use balances (modern) or sash cords (older) to counterweight the sash. When these fail, the window won't stay open. (3) Broken crank operator — casement and awning windows use a crank mechanism that wears out over 10–20 years. (4) Failed weatherstripping — causes drafts and energy loss. All four are repairable without full window replacement.

Window repair costs $75–$400 for most common issues. Foggy double-pane glass replacement (IGU only): $150–$400 per sash.

Window repair is one of the most DIY-accessible home repairs, and one where the diagnostic step is critical — the right fix costs $75–$400; the wrong diagnosis leads to unnecessary full replacement at $300–$800 per window.

Window Repair Cost by Problem

Problem	DIY Cost	Professional Cost
Foggy double-pane (IGU replacement)	Not DIY-practical	$150–$400/sash
Broken balance (double-hung)	$15–$40 parts	$100–$200
Broken crank/operator (casement)	$20–$60 parts	$100–$250
Rotted sill (surface only)	$30–$60	$150–$300
Rotted sill (structural)	Not DIY-practical	$300–$600
Weatherstripping replacement	$10–$30/window	$75–$200/window
Broken lock or latch	$10–$40	$50–$150
Single-pane reglazing	$15–$30	$50–$150/pane
Cracked pane replacement	$20–$60 glass	$100–$300

Repair vs. Replace: The Decision Framework

Window Condition	Recommendation
Good frame, failed IGU only	Repair — IGU replacement
Good frame, mechanical failure only	Repair — hardware replacement
Surface rot on sill	Repair — epoxy consolidant treatment
Structural rot in frame	Evaluate — may require full replacement
Single-pane in cold climate	Consider replacement for energy savings
Frame in good condition, window < 15 years	Always repair first
Frame compromised, window > 20 years	Replacement often more cost-effective

The Foggy Double-Pane Explanation

Double-pane windows (also called insulated glass units or IGUs) have a gas-filled space between two panes sealed with a perimeter spacer. When the seal fails, outside air (carrying moisture) infiltrates the space and condenses on the inner pane surfaces — the “fog” or “condensation between the panes.”

The fog doesn’t affect structural integrity but does reduce insulating value. Seal failure is irreversible once started — the only fix is IGU replacement. An IGU-only replacement keeps the existing frame and sash, which is the cost-efficient approach when they’re undamaged.

Regional Cost Variations

Window repair pricing tracks local glazier and handyman labor rates:

Region	IGU Replacement (per sash)	Hardware Repair
Northeast (NY, MA)	$200–$500	$125–$275
Southeast (FL, GA)	$130–$350	$80–$200
Midwest	$140–$380	$90–$220
Southwest	$130–$360	$85–$210
Pacific Northwest	$175–$425	$110–$250

Window Repair by Window Type

Different window types have different common failure modes:

Window Type	Most Common Repair	Typical Cost
Double-hung	Broken balance or sash cord	$100–$200
Casement	Broken crank/operator	$100–$250
Awning	Broken operator or hinge arm	$100–$250
Sliding	Damaged roller or latch	$75–$175
Fixed (picture window)	IGU seal failure only	$150–$400
Bay/bow	IGU seal failure (one sash)	$175–$450

Casement crank operators are the highest-frequency hardware repair for windows built in the 1990s–2000s. The Truth Hardware and Andersen operators are commonly stocked at window repair shops and hardware suppliers — bring the old operator to match the model number.

Finding Window Repair Services

Window repair is offered by:

• Dedicated glass repair companies (glaziers)
• Local window dealers (Andersen, Pella, Marvin dealers)
• Handyman services (for hardware, weatherstripping)
• Window installation companies (also do repair)

What to bring when calling for a quote: the window brand (usually on a sticker in the corner of the sash or frame), the size of the glass (measure width × height of the sash), and photos of the damage or failure mode.

For IGU replacement: local glass shops can often fabricate a replacement IGU to your dimensions in 3–7 business days, for less than a window dealer’s price. Bring a failed sash to a local glass shop and get a direct comparison quote.

DIY Window Repairs Worth Attempting

Repair	DIY Difficulty	Tools Needed	Cost Savings
Weatherstripping replacement	Easy	Scissors, utility knife	$50–$150
Lock/latch replacement	Easy	Screwdriver	$50–$100
Sash cord replacement (older windows)	Moderate	Basic tools	$80–$150
Balance replacement	Moderate	Screwdriver, balance spec	$80–$175
Surface rot treatment (epoxy)	Moderate	Putty knife, sander	$100–$250
IGU replacement	Hard — not usually DIY	Specialized tools, safety	$100–$300

The weatherstripping upgrade: this is the highest-ROI DIY window repair. A $15 roll of V-strip weatherstripping installed on a drafty double-hung window can reduce air infiltration by 60–80% and noticeably improve comfort in adjacent rooms.

Regional Window Repair Cost Variations

Region	Foggy IGU Replacement	Sash Replacement	Frame Rot Repair
Northeast (NY, MA, NJ)	$275–$550	$450–$900	$600–$1,400
Mid-Atlantic (DC, MD, VA)	$250–$500	$400–$850	$550–$1,250
Southeast (FL, GA, TX)	$200–$425	$350–$750	$450–$1,100
Midwest (IL, OH, MI)	$225–$475	$375–$800	$500–$1,200
Pacific (CA, WA, OR)	$275–$550	$450–$900	$600–$1,400

Prices per window. Multi-window jobs typically drop 10–20% per unit. Emergency glass replacement (broken pane, security risk) adds 50–100% for after-hours service.

Window Repair Service Provider Comparison

Provider	Specialization	Price Range	Best For
Local glazier/glass shop	IGU replacement, glass cutting	$200–$600/window	Best price on glass-only repairs; deep inventory
Local window company	Full repair range; brand-specific parts	$350–$900/window	Comprehensive repairs including hardware and frames
Andersen Certified Service	Andersen windows only	$400–$1,000/window	Warranty-backed repairs on Andersen products
Pella Service Network	Pella windows only	$400–$1,000/window	Factory parts and warranty support for Pella
Marvin Service	Marvin windows only	$450–$1,100/window	Premium brand support; clad and wood expertise
Handyman service	Basic caulk, weatherstripping, minor repairs	$75–$300/visit	Low-complexity repairs; good for maintenance items

For out-of-warranty branded windows, local glaziers often match or beat factory service pricing using equivalent glass specs.

Questions to Ask Your Window Repair Contractor

1. Can you source the exact IGU or sash for my window brand and model, or will you use a substitute? OEM glass units maintain the original U-factor and Low-E coating specs; aftermarket substitutes may look identical but perform differently on energy efficiency and warranty compliance.

2. Is the seal failure isolated to this pane, or do you see signs of frame or sash degradation? A contractor who only quotes the glass without examining the frame and drainage system may leave you with a recurring problem — moisture infiltration usually indicates a broader issue.

3. Does your repair come with a written warranty, and what does it cover? Labor warranties of 1–2 years and glass seal warranties of 5–10 years are standard. Get both in writing and clarify whether the warranty is voided by subsequent repairs or repainting.

4. Are you licensed, insured, and experienced with this window type (wood, vinyl, fiberglass, aluminum)? Window repair on historic wood windows or clad windows requires different techniques than vinyl frame work. Mismatched skills lead to finishes that fail prematurely or void manufacturer warranties.

5. Should I repair or replace at this point, and what’s the 10-year cost comparison? A professional who won’t give you an honest replacement-versus-repair comparison is prioritizing a sale over your interests. If the frames are solid and the glass is isolated, repair wins on cost. If multiple windows are failing and the frames are compromised, replacement math often changes.

DIY supplies (if you tackle it yourself)

• Window glazing compound
• Window weatherstripping
• Window rope caulk (temporary)
• Sash lock/window latch

Related Reading

• How to Fix a Foggy Double-Pane Window
• How to Fix a Drafty Window
• Window Replacement Cost
• How to Caulk Around Windows
• How to Fix a Rotted Window Sill
• Spray Foam Insulation Cost
• Annual Home Maintenance Schedule
• How Much Does a Handyman Cost?