Delaware cost guide
Window replacement cost in Delaware
In Delaware, window replacement prices run close to the national average — whether you're in Wilmington, Dover, or Newark. Here's what a complete, permitted job should cost, and how to tell whether the quote in your hand is fair.
Typical Delaware range
$6,100 – $24,500
Replacement windows commonly run $600–$1,600 each installed.
Included at this price: Unit, installation, flashing, interior/exterior trim, and disposal.
Delaware prices by project type
| Project | Delaware range | Unit check |
|---|---|---|
| Insert (retrofit) replacement windows | $5,100 – $18,400 | Insert replacements commonly run $500–$1,200 each installed. |
| Full-frame replacement windows | $8,200 – $30,600 | Full-frame replacements commonly run $900–$2,000 each installed. |
| Specialty, bay, or oversized windows | $3,100 – $20,400 | Bay and picture windows commonly run $1,800–$6,000 each installed. |
Reviewed 2026. Editorial benchmarks from public cost surveys (Zonda Media / Remodeling magazine, Houzz, Angi / HomeAdvisor), adjusted by a state construction-cost index. Not a bid, appraisal, or licensed estimating data.
What a common size costs in Delaware
Replacement window, installed: $600–$1,600 per window, adjusted for Delaware construction costs.
| Size | Delaware estimate |
|---|---|
| 5 windows | $3,100 – $8,200 |
| 10 windows | $6,100 – $16,300 |
| 15 windows | $9,200 – $24,500 |
| 20 windows | $12,200 – $32,600 |
Per-unit rate from the public cost guides cited above, multiplied by size and the Delaware construction-cost index. Access, demolition, repairs, and permits can add to it — this is a benchmark, not a bid.
Red flags in Delaware window replacement quotes
- Insert (pocket) versus full-frame replacement
- Manufacturer, series, glass package, and U-factor
- Flashing and sealing method at the opening
- Interior and exterior trim restoration
- Disposal of old units
Commonly missing line items: interior trim and paint restoration, exterior capping or wrap, rot repair at sills, disposal and haul-away, lead-safe practices on pre-1978 homes.
Already have a window replacement quote in Delaware?
Upload it for a free red-flag scan — about 20 seconds. Full report with price position, missing scope, and negotiation questions: $12.
Related cost guides
Homeowners in Delaware can also read and write contractor reviews before choosing who to hire.