How Much Does It Cost to Replace 15 Windows? (2026 Pricing by Count & Region)

Replacing 15 windows costs $4,800–$13,900 nationally in 2026, with a mid-range estimate of around $8,300 for standard double-hung windows at typical regional labor rates. The range reflects real variance — window type, glass package, and your local contractor market each move the number significantly.

This guide gives you cost tables by window count, window type, and U.S. region so you can benchmark any bid you receive.

Cost by Window Count (2026 National Averages)

The table below uses national average pricing across all U.S. regions for standard double-hung vinyl replacement windows, fully installed.

Windows	Low estimate	Mid estimate	High estimate
5 windows	$1,600	$2,800	$4,600
8 windows	$2,600	$4,400	$7,400
10 windows	$3,200	$5,600	$9,200
12 windows	$3,900	$6,700	$11,100
15 windows	$4,800	$8,300	$13,900
20 windows	$6,400	$11,100	$18,500
25 windows	$8,100	$13,900	$23,100

Prices include window unit cost, installation labor, disposal of old windows, interior and exterior trim work, and basic caulking and weatherstripping. Bay windows, egress windows, and specialty shapes are priced separately — see the window type table below.

Per-window pricing runs $320–$920 nationally. The cost per window drops slightly on larger jobs (15+ windows) because mobilization costs are spread across more units and crews can work more efficiently.

Cost by Region (15 Windows)

Labor rates vary 30–50% between the most and least expensive U.S. markets. These estimates are for 15 standard double-hung vinyl windows:

Region	Low	Mid	High
Northeast	$5,300	$9,000	$15,000
Southeast	$4,200	$7,400	$12,300
Midwest	$4,500	$7,800	$12,900
Southwest	$4,500	$7,700	$12,600
West	$5,700	$9,900	$16,500

Northeast and West Coast markets consistently run 20–35% above the national average for window installation. The Southeast and parts of the Midwest are 10–20% below. Your specific metro matters more than the region label — a Chicago contractor costs more than a rural Wisconsin contractor, even in the same Midwest region.

Cost by Window Type

Not all windows are priced the same. Frame material, operating style, and size all affect the per-unit cost before labor.

Window type	Per window (installed)	Notes
Double-hung vinyl	$300–$700	Most common; easy to clean
Casement vinyl	$400–$900	Hinged outward; better seal
Sliding vinyl	$300–$650	Two panes slide horizontally
Picture (fixed)	$250–$550	No operation; best for views
Awning	$400–$800	Hinged top; good for rain ventilation
Double-hung fiberglass	$500–$1,100	More durable than vinyl; holds paint better
Double-hung wood	$600–$1,300	Classic look; higher maintenance
Bay or bow window	$1,500–$4,500	Per unit; structural work often required
Egress (basement)	$500–$1,500	Requires well excavation in many cases
Garden window	$800–$2,200	Projects outward; common in kitchens

Most homes have a mix of types. A typical 15-window job might include 10 double-hung, 3 casement, and 2 picture windows — the cost varies by what you're replacing.

What's Included in a Window Replacement Quote

A complete quote for standard replacement windows should cover:

• Window unit — frame, sash, glass package, hardware
• Installation labor — removal of existing window, setting and leveling new unit
• Interior trim and casing — reinstallation or replacement of window trim
• Exterior caulking and flashing — sealing the exterior perimeter
• Disposal — removal and haul-away of old windows
• Basic drywall patching — minor touch-up around the frame

Not typically included:

• Full window frame replacement (when only the sash is replaced)
• Exterior trim painting or staining
• Significant drywall repair or plaster work
• Window well installation for egress windows
• Structural modifications for window resizing

Always confirm the quote scope in writing before signing.

Glass Package Options and Their Cost Impact

The glass unit inside the frame is one of the biggest per-window cost variables:

Glass option	Premium over standard double-pane
Standard double-pane	Baseline
Low-E coating	+$20–$60 per window
Argon gas fill	+$30–$80 per window
Low-E + argon (common bundle)	+$50–$120 per window
Triple-pane	+$100–$300 per window
Impact-resistant (hurricane)	+$200–$500 per window

Low-E with argon is worth it for most homeowners. It cuts UV transmission by 40–70%, reduces summer heat gain, and improves winter insulation — typically adding $5–$15/month in energy savings, paying back the premium in 4–7 years. Triple-pane makes sense in extreme cold climates (Minnesota, North Dakota, northern New England); the payback period is longer in moderate climates.

Factors That Affect Total Cost

Frame material is the biggest single variable. Vinyl is cheapest and lowest maintenance. Fiberglass costs 20–40% more but holds its shape better and accepts paint. Wood is the most expensive and requires periodic painting or staining.

Window size matters within each type. A standard 3×4 ft double-hung is the baseline; larger windows (4×5, 4×6) cost proportionally more both for the unit and for labor.

Installation complexity varies by home. Older homes may have irregular rough openings, rotted framing, or lead paint (pre-1978 homes) that require remediation before installation. Budget a 10–15% contingency on older homes.

Removing and replacing exterior trim adds $50–$200 per window if the existing trim is damaged or you're upgrading the exterior appearance.

Your local contractor market often matters more than any of the above. Labor rates in Seattle or Boston can be 40% above the national average; rural Southern markets can be 20% below.

Should You Replace All Windows at Once or in Stages?

Replace all at once when:

• Multiple windows are failing or drafty
• You want visual consistency (matching frames, hardware, grilles)
• Your contractor offers a volume discount (most do on 10+ windows)
• You want a single mobilization, permit, and disruption period

Replace in stages when:

• Only a few windows are actively failing
• Budget is constrained
• You want to test a brand or installer before committing the whole house

Volume pricing typically kicks in at 8–10 windows. Most installers will discount 5–12% on a whole-house job versus individual replacements — ask explicitly during the quote process.

How to Evaluate a Window Replacement Quote

Before signing anything, verify:

1. Specific product name and model number — not just "vinyl double-pane." Ask for the manufacturer (Andersen, Pella, Milgard, PlyGem, etc.) and product line.
2. Glass package specification — low-E? argon? what U-factor and SHGC rating?
3. Frame material and color — vinyl, fiberglass, or wood? Stock color or custom?
4. What's included in trim work — does the quote include interior casing reinstallation?
5. Disposal and cleanup — are old windows included in haul-away?
6. Payment schedule — standard is 30–50% upfront, remainder on completion. Never pay in full upfront.
7. Warranty terms — manufacturer warranty on the window unit (typically 20–lifetime) plus contractor workmanship warranty (typically 1–5 years).

Get at least 3 quotes. A 20–30% spread between bidders is normal and usually reflects different product tiers. A 50%+ spread almost always means one bidder is quoting a lower-quality product or skipping components.

Frequently Asked Questions

How much does it cost to replace 15 windows? Replacing 15 standard double-hung vinyl windows costs $4,800–$13,900 nationally, with a mid-range estimate of $8,300. Northeast and West Coast markets run $9,000–$15,000 for the same scope; Southeast and Midwest markets typically come in at $7,400–$12,900.

How long does it take to replace 15 windows? An experienced crew of 2–3 installers can typically replace 8–12 standard windows per day. A 15-window job usually takes 1.5–2 days. Homes with difficult access, older framing, or mixed window types may take 2–3 days.

Do I need a permit to replace windows? In most jurisdictions, replacing windows in the same opening with a same-size unit (a "like-for-like" replacement) does not require a permit. Changing the size or location of a window opening, or adding a new window where none existed, almost always requires a permit. When in doubt, ask your contractor — they should know local requirements.

What window brands are most reliable? Andersen and Pella are the most recognized premium brands. Milgard and Marvin are well-regarded in the West. PlyGem and Simonton offer solid mid-range value. For budget replacement windows, Windsor and Great Lakes Windows are common. The installer's quality matters as much as the brand — a perfect window improperly installed will still leak and draft.

Does window replacement reduce energy bills? Yes, but the payback period varies widely. Replacing single-pane or failed double-pane windows with new low-E/argon units typically saves $100–$250 per year in energy costs for a 15-window home. At mid-range installation cost ($8,300), that's a 33–83 year payback on energy savings alone — window replacement is better justified by comfort, noise reduction, and home value than raw energy ROI.

Does window replacement increase home value? The Remodeling Magazine Cost vs. Value report shows vinyl window replacement returns approximately 67–68% of cost at resale — one of the better returns among mid-range home improvement projects. It also removes a potential red flag for buyers and lenders who see failed seals or damaged frames during inspection.

What's the difference between replacement windows and new construction windows? Replacement windows (also called "insert windows") fit into the existing frame without removing the exterior trim or siding. They're faster and less disruptive but slightly smaller than the original opening. New construction windows require full removal of the exterior trim and are used when the rough opening or frame needs to be replaced. Replacement windows are the standard for most residential window projects.