# How to write a window replacement estimate by unit

Plan a window replacement quote in Australia: measure the work, separate supply and labour, check scope boundaries and inspect a fictional AUD PDF example totalling A$4,816.00.

Canonical: https://quicklyestimates.com/en-au/guides/how-to-estimate-window-replacement/
Author: Estimates editorial team
Published: 2026-09-25
Updated: 2026-09-25

Write a window replacement estimate around a unit schedule with dimensions, product selections and installation assumptions. Separate product cost, labour and surrounding finish work, and explain how concealed opening damage will be handled. The worked four replacement window units example uses measured metric quantities and fictional AUD amounts; check the actual site and supplier information before quoting.

THE SHORT ANSWER

Write a window replacement estimate around a unit schedule with dimensions, product selections and installation assumptions. Separate product cost, labour and surrounding finish work, and explain how concealed opening damage will be handled.

This Australian walkthrough uses a fictional four replacement window units in Perth, Western Australia. The matching window replacement estimate example (https://quicklyestimates.com/en-au/samples/window-replacement-estimate/) shows the same item quantities and amounts in an app-exported PDF. Measure your own site and replace the example rates before issuing a client quote.

1. Create a unit schedule

Identify each window by room or location, dimensions and selected product. Quantity alone does not establish comparability. A customer can evaluate a quote more easily when four units refer to four specific openings.

For this example, the agreed starting scope is: Replace four selected windows in existing suitable openings. Include a product allowance, removal, installation labour, interior trim touch-up allowance, disposal and cleanup. Opening enlargement and concealed repairs excluded. A change to a listed surface, product or access assumption should trigger a revised line or allowance.

2. Clarify replacement assumptions

State the installation approach and starting condition determined for the actual property. The sample assumes suitable existing openings. It does not price enlargement, reframing or a redesign of the opening.

3. Account for surrounding finishes

Interior casing, exterior details and paint touch-up can differ from opening to opening. Describe the included finish work and who completes excluded tasks. A new window unit does not automatically mean every adjoining surface is refinished.

4. Handle product and condition changes explicitly

Replace the product allowance with a confirmed supplier quote once selections are settled. Explain the review process for concealed damage discovered during removal. Avoid promising product performance, energy savings or code compliance from a generic estimate example.

Worked window replacement calculation

Two checkable lines from the example are 4 each × A$595.00 = A$2,380.00; 4 each × A$91.00 = A$364.00. The full 6-line estimate totals A$4,816.00 with the demonstration tax input at 0%. The amount is a fictional scenario, not an Australian market rate or a recommended selling price.

Material purchasing and installed quantities may differ. For your own estimate, use the actual takeoff, supplier prices, labour plan, access and disposal requirements. Decide how overhead, profit and the applicable tax treatment affect your final quote; do not copy the example's zero tax setting.

Before you share the estimate

- List each opening and selected unit.
- Confirm dimensions before ordering.
- Define interior and exterior finish scope.
- Document concealed-condition and product-change handling.

Scope boundary in this example: No opening enlargement, structural repair, full wall refinishing, specialty glazing or performance guarantees beyond the selected product terms.

Confirm the client details and location, item descriptions, measured units, total and validity date. If opening up the work reveals a different condition, document the changed scope and price before proceeding.

Common questions about window replacement

Why separate window products from installation labour?

It shows how a different selected unit changes the material amount and keeps installation assumptions visible during comparisons.

Should trim be part of a window estimate?

State the agreed trim work explicitly. Include its quantity or allowance and distinguish touch-up from complete replacement or repainting.

(https://quicklyestimates.com/en-au/samples/window-replacement-estimate/) Preview of the matching estimate PDF · View the matching example (https://quicklyestimates.com/en-au/samples/window-replacement-estimate/)

FROM SCOPE TO PDF

Make your own window replacement estimate.

Describe the actual job in Estimates on iPhone or Android, then review every quantity, rate and scope note. Add your business and client details, check the document and share an itemised PDF. Example amounts are fictional, and some app features may require an in-app purchase.

Create a quote ↗ (https://quicklyestimates.com/en-au/download/)View the matching PDF example → (https://quicklyestimates.com/en-au/samples/window-replacement-estimate/)

Related estimating resources

- Matching itemised example and PDF (https://quicklyestimates.com/en-au/samples/window-replacement-estimate/)
- Exterior painting estimate example (https://quicklyestimates.com/en-au/samples/exterior-painting-estimate/)
- How to create a clear tradie quote (https://quicklyestimates.com/en-au/guides/create-a-tradie-quote/)

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