$1,425-$4,575
Typical $3,000 each, including product and labor allowances.
2026 Exact-size planning tool
Custom Window Cost Calculator
Enter the measured width and height, shape, fit path, style, material, glass package, installation scope, opening condition, access, and market to separate product cost from custom-size and labor allowances.
The result shows a per-window and total installed range, then compares a closest stock-size scenario when a rectangular opening may have a realistic substitution path.
Exact dimensionsStock-size checkQuote questions
Custom-size estimate
Price the opening, not just the window.
Run one scenario for openings with the same dimensions and installation scope. Use another scenario for shapes, access, or repair conditions that differ.
Custom size worksheet
Enter the opening and bid scope
Use measured width and height with the style, shape, product path, material, glass, installation scope, repair condition, access, and market a contractor will price.
Installed custom-size range
2 casement windows at 60 x 72 inches
$2,850-$9,150
Typical $6,000 for 2 windows.
30.0 sq ft
Rectangle, made-to-order, vinyl, low-e.
Custom, shape, and oversize adders
Per-window product allowance$750-$2,125
Installed labor allowance$800-$2,100
Custom size / made-to-order premium$100-$300
Shape premium$0-$0
Oversize premium$75-$200
Repair and scope line items
Repair allowance$175-$500
Scope / access / marketFull-frame, Mostly ground floor, Higher-cost metro
Closest stock-size scenario60 x 72 in. stock check: $2,450-$7,700 total
Close enough to ask whether a stock unit changes trim, visible glass, or finish work.
Quote questions
- What exact ordered size, frame size, and visible glass size are you quoting?
- Is each opening priced as insert replacement or full-frame work?
- Which trim, flashing, exterior finish, disposal, and repair lines are included or allowances?
- Is the glass package exactly Low-E, with written NFRC or performance details?
- Would a stock-size substitution change finish work, glass area, trim, or warranty responsibility?
Before the sales appointment
What makes a custom window quote hard to compare?
A custom unit may be expensive because of the ordered size, or because the installer is also pricing full-frame work, trim, flashing, rot repair, access, or a nonstandard shape.
| Line | Why it matters | Ask for |
|---|---|---|
| Ordered size | Fractional, oversize, or special shape units may be made-to-order. | Exact frame size and visible glass size |
| Scope | Insert and full-frame bids can differ by hundreds per opening. | Insert vs full-frame, trim, flashing, insulation, and disposal |
| Finish work | A stock-size substitution can still cost more if finish work expands. | Whether stock size changes trim, siding, or glass area |