Window Replacement Cost in Delaware: 2026 Pricing Guide
Updated October 2026 · Sourced from BLS, FRED & EIA
Window replacement in Delaware costs $587–$1,270 per window installed in 2026 — near the national average (Moderate cost tier) — or $5,870–$12,700 for a typical 10-window project before bulk discounts.
Delaware benefits from its small size and proximity to the competitive Philadelphia contractor market. Costs are moderate for the Mid-Atlantic region, and standard double-pane Low-E vinyl handles most of the state well.
Get a personalized estimate for your Delaware home with our window replacement cost calculator — just enter your zip code for region-adjusted pricing. To see how Delaware compares to the national picture, read our full breakdown of how much window replacement costs in 2026.
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How this Delaware estimate is calculated
$587–$1,270 per window installed, from BLS wages and the FRED price index
Based on BLS, FRED & EIA data
Labor, weatherproofing and price escalation come from federal data. The base material cost does not — and we say so below rather than rounding it into the same sentence. Reference window: standard vinyl double-hung, retrofit install.
- Labor
- 2 man-hrs (NREL/Craftsman) × $29/hr national carpenter wage (BLS OEWS, SOC 47-2031) × 2.84 contractor markup = $165
- Materials
- Vinyl frame + Low-E glass, escalated 5.8% since 2025 by the FRED producer price index. The base cost this escalates is not independently sourced — it is the largest single term in the estimate and the one we cannot yet cite. Retail listings for the products named in our tiers put a comparable unit at $284–$379, which brackets it. How we are trying to close that.
- Weatherproofing
- $20–$35 per opening — flashing tape, foam, backer rod and caulk, priced per opening rather than as a percentage of the window (DuPont GREAT STUFF)
- Installed cost
- $587–$1,270 per window installed · $5,870–$12,700 for a 10-window project (before bulk discount)
Sources: BLS OEWS · FRED · NREL & Craftsman — updated October 2026
Delaware Window Replacement: Quick Facts
Cost Per Window
$587 - $1,270
Cost Tier
Moderate
Labor Rate
$71-$84/hr
Climate Zone
North-Central
Best Time to Buy
November - February
Most Popular Material
Vinyl
Whole-House Project Costs in Delaware
| Project Size | Estimated Cost Range | With 15% Bulk Discount |
|---|---|---|
| 5 windows | $2,935 - $6,350 | $2,495 - $5,398 |
| 10 windows | $5,870 - $12,700 | $4,990 - $10,795 |
| 15 windows | $8,805 - $19,050 | $7,484 - $16,193 |
| 20 windows | $11,740 - $25,400 | $9,979 - $21,590 |
For a full breakdown of bulk pricing strategies, see our whole house window replacement cost guide.
What Drives Window Costs in Delaware?
- Access to Philadelphia-area contractors keeps prices competitive
- No sales tax on materials can save 6-8% vs. neighboring states
- Coastal areas may need wind-resistant options
- Small state with consistent pricing statewide
Window Replacement in Delaware's Top Cities
Pricing can vary 20-40% between metro areas and rural communities within Delaware. The major markets of Wilmington, Dover, Newark, and Middletown typically have more contractor competition, which helps keep prices in check.
| City | Estimated Range | Basis |
|---|---|---|
| Wilmington | $587 - $1,270 | Delaware range (no metro wage data) |
| Dover | $587 - $1,270 | Delaware range (no metro wage data) |
| Newark | $587 - $1,270 | Delaware range (no metro wage data) |
| Middletown | $587 - $1,270 | Delaware range (no metro wage data) |
ENERGY STAR Requirements for Delaware
Delaware falls in the North-Central ENERGY STAR climate zone. To qualify for ENERGY STAR certification in 2026, windows must meet these minimums:
| Metric | Requirement |
|---|---|
| Maximum U-Factor | 0.25 |
| Maximum SHGC | 0.40 |
| Popular Material | Vinyl |
For a deeper dive into energy-efficient options, see our energy efficient windows cost guide.
Best Time to Replace Windows in Delaware
The best time to schedule your window replacement in Delaware is November - February, when you can typically save 10-15% off peak-season pricing. Contractors are less busy during this period and more willing to negotiate on price or throw in extras like upgraded trim or extended warranties.
How to Save on Window Replacement in Delaware
- Get 3-5 quotes — the spread between highest and lowest bids is often 30-50%.
- Schedule off-season — November - February offers the best pricing.
- Do the whole house at once — bulk discounts of 10-20% are standard.
- Choose vinyl — at $587-$1,270 per window, it's the most affordable mainstream option. See our vinyl window cost guide.
- Check for rebates — the federal Section 25C tax credit expired December 31, 2025, but Delaware may have state or utility rebate programs still available.
Frequently Asked Questions: Delaware Window Replacement
How much does it cost to replace windows in Delaware?
What is the best window material for Delaware?
When is the cheapest time to replace windows in Delaware?
Data Sources
Cost estimates for Delaware are based on the following sources:
- Bureau of Labor Statistics — Carpenter wages for Delaware metro areas (SOC 47-2031, OEWS May 2025)
- ENERGY STAR — North-Central zone window efficiency requirements (U-factor 0.25, SHGC 0.40)
- U.S. Energy Information Administration — Delaware residential electricity rates for energy savings calculations
Get Your Delaware Window Replacement Estimate
These are averages — your actual cost depends on your specific windows, home construction, and the contractors in your local Delaware market. Use our window replacement cost calculator for a personalized estimate, then compare against quotes from at least three licensed Delaware contractors.
For national pricing comparisons, see our window replacement cost by state overview.
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