Example Estimate
| Description | Qty | Unit Price | Amount |
|---|---|---|---|
| Double-pane vinyl window (36×60, Low-E, argon) | 8 | $385.00 | $3,080.00 |
| Picture window, triple-pane (48×48) | 2 | $620.00 | $1,240.00 |
| Window installation: removal of old frame | 10 | $95.00 | $950.00 |
| Disposal fee (construction debris) | 1 | $275.00 | $275.00 |
| Exterior flashing and butyl tape | 1 lot | $185.00 | $185.00 |
| Interior trim and caulking | 10 | $35.00 | $350.00 |
| Building permit (window replacement) | 1 | $195.00 | $195.00 |
| Total Estimated Cost | $6,275.00 |
What to Include on a Window Replacement Estimate
- Company name, contractor license, and insurance info
- Client name and property address
- Window measurements (width × height)
- Frame material and style (vinyl, aluminum, wood, fiberglass)
- Glass type (single pane, double pane, Low-E, argon-filled)
- Quantity of windows
- Removal and disposal of old windows
- Labor for installation
- Flashing, sealant, and insulation
- Interior trim and exterior caulking
- Permit fees if applicable
- Estimated project timeline
- Validity period
How to Estimate a Window Replacement Job
Measure each window opening from the interior — take three measurements (top, middle, bottom) for both width and height, and use the smallest number. Confirm the rough opening depth. Frame material affects price significantly: vinyl is most affordable, wood is highest-end, and fiberglass offers the best durability for extreme climates.
Glass upgrades — Low-E coatings, argon gas fills, and triple-pane — add substantial cost. Always quote these as line items so clients understand why one window costs more than another. Double-pane is the standard minimum for energy code in most jurisdictions.
Disposal fees are often forgotten. A roll-off dumpster for window debris runs $275–$500 per job. Building permits are required in most municipalities for full frame replacements — budget $100–$300 depending on the number of windows. Always include a validity period of 15–30 days since window pricing can change with supplier shifts.