Window installation estimate template — and a generator that fills it in
What a window estimate must state per opening — retrofit or full-frame, size, glass package and flashing — plus a generator that drafts one from your description.
Generate this estimate now
Describe the job in plain words. No email needed to see your first estimate — about fifteen seconds for a small job, a little longer for a big one.
What you get — see the format first
A complete estimate you can send to the customer, built from the rate you enter:
| Description | Qty | Unit | Unit price | Total |
|---|---|---|---|---|
| Labor — itemized by task | hrs | hour | your rate | — |
| Materials — with your markup applied | qty | ea / sq ft | cost + markup | — |
| Permits, disposal, access | — | — | — | — |
Plus a plain-English scope summary, assumptions (what had to be guessed), exclusions (what you are not doing — the section that prevents most change-order arguments), and a validity period. Printable, or send the link.
Every figure comes from the rate and markup you supply. We never fill in a market price for you.
An estimating spreadsheet that opens in Excel, Numbers or Google Sheets, or prints to PDF. Pre-filled with the line items a window installation estimate should contain, plus a checklist of what window installation estimating most often leaves out — so you price it before you send, not after.
- Blank — the line items, ready to price by hand.
- Auto-calculating — same sheet with the maths built in; type a quantity and a rate and it totals itself. Formulas work in Excel and Google Sheets.
- Printable — a clean one-page layout to fill in on site or save as PDF.
How window installation jobs are bid
Windows are bid per opening, and the price per opening swings on one decision: insert retrofit or full-frame replacement. An insert drops into a sound existing frame and is predictable. Full-frame means the trim comes off, the flashing gets redone and whatever is rotten behind it becomes part of the job. Sizes have to be field-measured per opening — ordering from a plan and finding out at install is the expensive failure in this trade. Pre-1978 houses add lead-safe work practices by law.
What a window installation estimate should contain
- Each opening listed separately with its field-measured size
- Insert retrofit or full-frame replacement, stated per opening
- Unit specification — frame material, glass package, U-factor and SHGC
- Interior and exterior trim: reuse, repair or replace
- Flashing, sill pan and the weather barrier tie-in
- Insulation and air sealing of the rough opening
- Interior finish — casing, caulk, paint touch-up if in scope
- Disposal of the old units
- Labour as installer hours per opening, not one blended number
- Lead-safe work practices where the house predates 1978
What gets left out of window installation estimates
- Rot at the sill or jamb found once the old unit is out — allowance it
- Egress sizing when a bedroom window is being replaced
- Stucco or brick openings, which are a different job from siding openings
- Lead time on custom sizes, and who stores the units until install day
Your prices, not internet averages
Generic AI quotes national averages. BidWand builds a price book from every estimate you send and every rate you correct, so by the fifth bid it prices like you do — your labor rate, your markup, your exclusions.
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How to estimate
How to write a contractor estimate · Estimate vs quote vs bid — and which one you should send · What to include in a contractor estimate · How to price a job as a contractor · Should you charge for estimates? · How to follow up on an estimate · How to handle change orders · Estimate vs invoice: what's the difference? · How to raise your prices as a contractor