Basement window replacement cost averages $700 per window in 2026, with most homeowners paying between $400 and $1,100 for a standard replacement. Egress windows, which need a bigger opening and often some digging, run much higher at $2,500 to $5,000 or more. This guide breaks down every part of the price so you know exactly what you’re paying for.

Whether you’re swapping out one cracked window or replacing every window in your basement, the total cost depends on a handful of things: the window type, the frame material, your local labor rates, and any extra work like a window well or waterproofing. Let’s go through each one.

Average Cost Overview

The short answer: basement window replacement costs $400 to $1,100 per window on average in 2026, with a national average of $700. Egress windows cost far more, starting around $2,500 and reaching $5,000 or higher once you add excavation and a window well.

This is up from $350–$950 in 2024, so prices have climbed a bit in the last two years. Labor rates alone rose from $15–$45 per hour in 2024 to $18–$55 per hour in 2026.

Here’s a quick breakdown of what you’re actually paying for:

Cost Component	Typical Range
Window unit	$100–$1,200
Labor	$100–$400 per window
Permits	$50–$500
Window well (if needed)	$750–$4,200
Waterproofing	$100–$1,000
Drainage	$200–$1,500

What Affects Basement Window Replacement Cost?

Several factors push your price up or down, and the biggest ones are window type, material, and whether you need an egress window. Size and glass type matter too, along with how easy (or hard) it is for a crew to reach your basement.

Here’s the full list of what changes your final bill:

• Window type – hopper, sliding, casement, glass block, or egress
• Frame material – vinyl, aluminum, fiberglass, wood, or steel
• Size – custom sizes add 25–50% to the cost
• Glass type – single-pane, double-pane, triple-pane, Low-E, or gas-filled
• Labor rates – these vary by region, from $18 to $55 per hour
• Accessibility – tight basements or deep foundations cost more to work in
• Window well needs – a new or replacement well adds a big chunk to your budget
• Permits – required for egress or structural work, optional for like-for-like swaps

Basement Window Types and Costs

Hopper windows are the cheapest option at $400–$700 installed, while egress windows are the most expensive at $2,500–$5,000+. The type you pick depends on whether the room is a bedroom (which usually needs egress), a utility space, or just needs better airflow.

Window Type	Low End	Average	High End	Best For
Hopper	$400	$550	$700	Basic ventilation, utility rooms
Sliding	$550	$850	$1,200	Wider openings, regular use
Glass Block	$350	$600	$1,200	Privacy, security, non-bedroom
Casement	$600	$950	$1,500	Maximum ventilation
Egress	$2,500	$3,500	$5,000+	Bedrooms, legal living spaces

Glass block windows work well if you want privacy and security without spending much. Casement windows cost more but open wider, which is nice if you want more fresh air in a finished space.

Frame Material Cost Comparison

Vinyl is the most budget-friendly frame material at $100–$650, while fiberglass costs more ($250–$1,200) but lasts longer and insulates better. Wood looks nicer but doesn’t hold up well in damp basements unless it’s well maintained.

Material	Prefab Unit	Installed Average	Lifespan	Notes
Vinyl	$100–$650	$450–$900	20–30 yrs	Affordable, moisture-resistant
Aluminum	$300–$675	$550–$1,100	20–30 yrs	Strong but poor insulation
Fiberglass	$250–$800	$700–$1,300	25–35 yrs	Durable, great insulation
Wood	$175–$800	$600–$1,200	15–25 yrs	Attractive, prone to rot
Steel	$250–$800	$800–$1,500	25–35 yrs	Very strong, can rust

Vinyl remains the most popular pick, holding 60–70% of the market, mostly because it resists moisture and doesn’t need much upkeep.

Labor Costs and Installation

Labor for a basement window replacement typically costs $100 to $400 per window, or $18 to $55 per hour depending on your region. Complex jobs, like egress conversions or ones that need concrete cutting, can push labor costs up to $400–$800.

Basic replacements that swap one window for another in the same opening are quick, often just 1–3 hours of work. Egress installs take much longer since they involve digging and cutting through the foundation.

DIY vs Professional Installation

DIY basement window replacement costs $100–$700 per window in materials, saving you $200–$450 in labor compared to hiring a pro. Professional installation runs $300–$1,000 per window but comes with proper sealing and code compliance.

Cost Component	DIY	Professional
Window Unit	$100–$700	$100–$700
Tools & Materials	$50–$150	Included
Labor	$0	$150–$400
Permits	$50–$200	$50–$200
Total Per Window	$200–$750	$300–$1,000

DIY makes sense for simple hopper or slider swaps if you’re comfortable with basic tools. But egress windows, concrete cutting, and anything involving structural changes should go to a licensed contractor — mistakes here can mean leaks, drafts, or a failed inspection.

Egress Window Requirements and Costs

Egress windows must meet a minimum 5.7 square foot clear opening, with at least 20 inches of width and 24 inches of height, and a sill no higher than 44 inches from the floor. Meeting these codes is why egress installs cost so much more than a standard swap.

These rules exist so people can safely escape a basement bedroom in an emergency. If you’re finishing a basement for use as a bedroom, an egress window (and a matching window well) is required by most building codes.

Window wells for egress windows need at least 9 square feet of floor area, and if the well is deeper than 44 inches, it needs a ladder. Full egress installation, including excavation, window well, and drainage, runs $2,500 to $5,000 or more.

Additional Costs to Consider

Beyond the window itself, budget for permits, window wells, waterproofing, and finishing work — these can add $500 to $5,000 depending on your project’s scope. Many homeowners underestimate these extras and end up over budget.

Item	Low End	Average	High End
Window Well	$200	$1,200	$4,500
Waterproofing	$100	$400	$1,000
Drainage Installation	$200	$600	$1,500
Concrete Cutting	$200	$350	$500
Permits & Inspection	$50	$200	$500
Interior Finishing/Trim	$300	$800	$1,500

It’s smart to add a 10–15% contingency to your budget. Hidden issues like rot, cracked concrete, or drainage problems often show up once the old window comes out.

Regional Cost Variations

Urban areas typically cost 20–30% more than rural areas for the same basement window job, mainly because of higher labor rates. States like California, New York, and Massachusetts sit at the high end, while Georgia, Arizona, and Midwest states tend to be cheaper.

State/Region	Low Per Window	High Per Window
California	$550	$950
New York	$600	$1,050
Texas	$400	$750
Florida	$400	$750
Georgia	$380	$700
National Average	$400	$1,100

Getting 3–5 local quotes is the best way to know what your project will actually cost, since national averages don’t always reflect what contractors in your area charge.

Energy Efficiency and Tax Credits

Homeowners who install ENERGY STAR certified basement windows can claim a federal tax credit worth 30% of the cost, up to $600 per year. This credit is available through the Energy Efficient Home Improvement Credit and is extended through 2032.

Many utility companies also offer rebates of $25 to $200 per window for energy-efficient upgrades. Upgrading from single-pane to double-pane glass can cut heating and cooling costs by 10–15%, while triple-pane can save 20–30%.

How to Save Money on Basement Window Replacement

Getting multiple quotes and choosing vinyl frames are two of the easiest ways to lower your basement window replacement cost. Timing your project and bundling it with other basement work can also help stretch your budget further.

1. Get 3–5 written quotes from licensed, insured contractors
2. Choose vinyl for the best balance of price and durability
3. Consider off-season installation for potential savings
4. Take advantage of ENERGY STAR tax credits and utility rebates
5. Bundle window work with other basement renovation projects
6. Do simple hopper or slider replacements yourself if you’re handy

How Long Does Basement Window Replacement Take?

A standard basement window replacement takes just 1–3 hours per window, while egress window installation takes 1–3 days per window because of the excavation involved. A full project, from getting quotes to final inspection, usually takes 2–8 weeks.

Custom windows can take 2–6 weeks to manufacture before installation even starts. Permit approval adds another 1–4 weeks depending on your local building department.

Signs You Need to Replace Basement Windows

Cracked or warping frames, trouble opening or locking the window, and constant condensation are the clearest signs it’s time for a replacement. Basement windows typically last 15 to 30 years, so age alone is often a good enough reason.

Other warning signs include water stains around the frame, drafts, rising energy bills, and rot on wood frames. If you’re finishing your basement and the current window doesn’t meet egress code, that’s also a trigger for replacement.

Common Mistakes to Avoid

The biggest mistakes are skipping permits, ignoring egress requirements, and underestimating the total project cost beyond just the window unit. These errors often lead to failed inspections or costly rework.

• Measuring incorrectly and ordering a window that doesn’t fit
• Skipping permits for egress or structural work
• Using regular caulk instead of waterproof sealant
• Ignoring exterior drainage and grading
• Choosing the cheapest window without checking quality
• Not setting aside a contingency budget for surprises

FAQs

How much does it cost to replace a basement window? The national average is $700 per window, with most projects falling between $400 and $1,100 for standard replacements. Egress windows cost significantly more, at $2,500 to $5,000 or higher.

What is the cheapest type of basement window? Hopper windows are the most affordable option, with installed costs of $400 to $700. Glass block windows are also budget-friendly at $350 to $1,200 installed.

Do I need a permit to replace a basement window? It depends on your location and the scope of work. Simple like-for-like swaps often don’t need a permit, but egress windows or structural changes usually require one costing $50 to $500.

Can I replace basement windows myself? Yes, for standard hopper or slider windows. DIY replacement costs $100 to $700 per window in materials and saves $200 to $450 per window in labor. Egress and complex installations are better left to professionals.

How much does an egress window cost? Egress windows cost $2,500 to $5,000 or more, fully installed. This includes the window unit, excavation, window well, drainage, and permits.

What size should a basement window be? Standard basement windows range from 24 to 48 inches wide and 12 to 36 inches tall. Egress windows must meet code: a minimum 5.7 square foot clear opening, 20 inches wide, 24 inches tall, and a sill no higher than 44 inches from the floor.

Are basement window replacements tax deductible? Not directly, but ENERGY STAR certified windows qualify for a federal tax credit of 30% of the cost, up to $600 per year. Many utilities also offer rebates of $25 to $200 per window.

How long do basement windows last? Basement windows typically last 15 to 30 years, depending on material and maintenance. Vinyl and fiberglass tend to last longer than wood in damp basement conditions.