THE ESTIMATING ANSWER
For one existing exterior opening, start with a defined scope and measurement basis. Measure opening in several positions, wall thickness, threshold height and access route. Separate the selected door unit, flashing and finish trim. Price the listed tasks separately and state the condition that would require a revision: Rotten sill framing or opening-size change adds work beyond replacement.
This guide uses a fictional project in Vancouver, British Columbia: One existing exterior opening. Its matching estimate and PDF give each scope decision a visible CAD cost line. Use the document to understand the structure; verify the actual building, product schedule, labour and supplier inputs before preparing a client quote.
1. Define the measured job
Replace one sliding patio door assembly within a sound existing opening, including sill flashing and interior trim allowance. Measure opening in several positions, wall thickness, threshold height and access route. Record the measurements and existing condition in the estimate before turning quantities into line items. The scope should make clear why this is a separate project from a broader renovation or maintenance quote.
Measurement basis: Measure opening in several positions, wall thickness, threshold height and access route.
2. Build a product and labour schedule
Separate the selected door unit, flashing and finish trim. This example has 7 distinct lines, including opening survey and product check, site and weather protection, old door removal. Use actual supplier prices and labour inputs for a customer job; the displayed amounts are fictional document inputs.
Selections to confirm: Separate the selected door unit, flashing and finish trim.
3. Sequence the work and handoffs
Confirm delivery and weather protection before removing the existing unit. Show which task depends on access, a selected product or another trade. If that dependency is still open, label the price preliminary and identify the information needed before a firm quote.
Work sequence: Confirm delivery and weather protection before removing the existing unit.
4. Set a change boundary
Rotten sill framing or opening-size change adds work beyond replacement. The example excludes structural opening enlargement, adjacent deck repair or concealed wall repair. Record the discovery, agree the revised work and update the estimate before adding it to the job.
If the job changes: Rotten sill framing or opening-size change adds work beyond replacement.
Review the Canadian job address
Inspect the existing substrate, access and product selections at the property. Check any local trade or municipal requirements that apply and record unresolved conditions before preparing the final client document.
Count the actual units, site visits and selected products separately. A count in this example is a document input, not a substitute for inspecting the real property. The example amounts are fictional CAD document inputs, not current rates for Vancouver, British Columbia or another community. A site visit and current supplier information are needed to replace them.
Work through the itemized calculation
Check each extension of quantity and rate in the paired PDF. Two lines from this project are:
- Old door removal: 1 each × C$650.00 = C$650.00.
- Door unit allowance: 1 each × C$4,590.00 = C$4,590.00.
Adding all 7 rounded line amounts gives C$8,760.00. The PDF shows 0% tax and the same total before any markup. The sample shows 0% tax only to make the arithmetic visible. Determine any applicable GST, HST or PST and markup for the actual work before sharing a quote.
| Work item | Quantity | Unit rate | Amount |
|---|---|---|---|
| Opening survey and product check | 1 job | C$350.00 | C$350.00 |
| Site and weather protection | 1 job | C$430.00 | C$430.00 |
| Old door removal | 1 each | C$650.00 | C$650.00 |
| Door unit allowance | 1 each | C$4,590.00 | C$4,590.00 |
| Flashing and seal allowance | 1 job | C$485.00 | C$485.00 |
| Door setting labour | 1 each | C$1,555.00 | C$1,555.00 |
| Trim and disposal | 1 job | C$700.00 | C$700.00 |
| Illustrative subtotal | C$8,760.00 | ||
Scope and pricing boundaries
Replace one sliding patio door assembly within a sound existing opening, including sill flashing and interior trim allowance.
Outside this example: No structural opening enlargement, adjacent deck repair or concealed wall repair.
Keep the product allowance, installation work and any unresolved condition visible as separate decisions. If access or the selected product changes, update the affected quantity or rate and explain the revision before the client relies on the estimate.
Before you send the estimate
- Measure opening in several positions, wall thickness, threshold height and access route.
- Separate the selected door unit, flashing and finish trim.
- Confirm delivery and weather protection before removing the existing unit.
- Rotten sill framing or opening-size change adds work beyond replacement.
Check the business, client, property, dates, line extensions and notes. The sliding patio door replacement PDF example shows one way to present them. Its short PDF note lists the brief's scope exclusions; the fuller project limits above should guide your own scope.
Questions about this estimate
Which quantity controls this sliding patio door replacement estimate?
Measure opening in several positions, wall thickness, threshold height and access route.
When should this sliding patio door replacement quote be revised?
Rotten sill framing or opening-size change adds work beyond replacement. No structural opening enlargement, adjacent deck repair or concealed wall repair.
MAKE THE NEXT ESTIMATE YOUR OWN
Build a sliding patio door replacement estimate.
Enter the job scope in Estimates on iPhone or Android or start from an AI-assisted draft. Check every quantity, rate, allowance, client detail and note before exporting the PDF. Some app features may require an in-app purchase.
