Window installers usually give a written quote after an in-home measure and inspection, often for free on full-house jobs. Homeowners typically gather two to four quotes and compare window brand and grade, what is included in the labor, and the warranty offered.
When to use estimates: Use estimates to provide project quotes and get client approval before starting work. Once approved, convert your estimate to an invoice with one click to collect payment.
Create an invoice for payment collection
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Invoice_1001_Client_2026-10-14.pdf
List brand, series, size, style, glass package, color, and grid options for each opening so the quote can be compared accurately and the order matches.
State whether it is an insert replacement or full-frame, because the difference affects labor, trim, and how much of the wall is disturbed.
Spell out whether interior casing, exterior capping, caulking, and painting are in or out, since clients often assume they are included.
State that unforeseen rot or framing damage is billed separately and give an hourly or per-repair rate so surprises do not become disputes.
Note who pulls permits, whether lead-safe practices apply to older homes, and any HOA approval the client must obtain.
Custom windows often take 4 to 10 weeks, so give an expected delivery window and note that the install date depends on it.
State that old units are removed and disposed of, and describe both the manufacturer warranty and your labor warranty.
| Service | Priced | Typical range |
|---|---|---|
| Insert/retrofit replacement, standard double-hung (labor only) | per window | $100-250 |
| Full-frame replacement, standard size (labor only) | per window | $250-600 |
| Large picture window or slider install (labor only) | per window | $300-750 |
| Bay or bow window install | per unit | $800-2,500 |
| Interior casing and exterior trim wrap | per window | $75-250 |
| Rot repair or sill/framing repair | per hour | $65-110 |
| Old window removal and disposal | per window | $15-50 |
| Second-story or difficult access surcharge | per window | $25-100 |
Typical US ranges. Rates vary by region, experience, and job size.
Quote only after measuring each window and checking wall condition. Phone or photo quotes lead to underestimates when you find stucco, brick molding, or out-of-square frames.
Presenting two or three window grades, such as basic vinyl, mid-grade vinyl, and fiberglass or wood-clad, lets clients choose by budget and often raises the average job size.
Window pricing can change between quote and order. Put a validity period of 15 to 30 days on the quote and note that pricing may be adjusted after that.
A quote with the product price and install price on separate lines makes your labor look reasonable and helps clients who want to compare with a dealer-only price.
Many installers measure and quote for free on full-job estimates. For small jobs, long drives, or consultations on complex repairs, a trip fee that is credited back if the client hires you is reasonable.
Fifteen to 30 days is common, since manufacturer pricing and material costs change. State the expiry date on the quote.
It can be, but include conditions: the price assumes normal wall conditions and the specified windows. Hidden rot, structural damage, or a change in product should trigger a written change order.
Many installers ask for 30 to 50 percent to cover ordering custom windows. Check your state's home improvement rules, since some states limit the deposit amount on residential contracts.
Use the Window Installer invoice template to bill the client, or convert this estimate once it's approved.
Window Installer invoice template