THE ESTIMATING ANSWER
For one paved patio edge, start with a defined scope and measurement basis. Measure channel run, paving cut length, invert level and available outlet route. Keep channel units, grates and pipe fittings distinct from excavation and reinstatement. Price the listed tasks separately and state the condition that would require a revision: No workable outlet or insufficient fall requires redesign rather than an assumed connection.
This guide uses a fictional project in St. John’s, Newfoundland and Labrador: One paved patio edge. 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
Install a surface drainage channel along an existing paved patio edge and connect to a confirmed suitable outlet. Measure channel run, paving cut length, invert level and available outlet 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 channel run, paving cut length, invert level and available outlet route.
2. Build a product and labour schedule
Keep channel units, grates and pipe fittings distinct from excavation and reinstatement. This example has 7 distinct lines, including levels and outlet survey, paving cut and lift, trench excavation. Use actual supplier prices and labour inputs for a customer job; the displayed amounts are fictional document inputs.
Selections to confirm: Keep channel units, grates and pipe fittings distinct from excavation and reinstatement.
3. Sequence the work and handoffs
Confirm outlet permissions and levels before cutting paving. 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 outlet permissions and levels before cutting paving.
4. Set a change boundary
No workable outlet or insufficient fall requires redesign rather than an assumed connection. The example excludes new soakaway, sewer repair or large-area repaving. Record the discovery, agree the revised work and update the estimate before adding it to the job.
If the job changes: No workable outlet or insufficient fall requires redesign rather than an assumed connection.
Review the Canadian job address
Verify the existing water, waste and fixture connections on site. Confirm who handles any required trade work, approvals and inspections for this address; this fictional document does not decide them.
The paving cut and lift line uses 45 linear ft., approximately 13.72 m. Check the route, cuts and supplier unit before setting a real quantity. The example amounts are fictional CAD document inputs, not current rates for St. John’s, Newfoundland and Labrador 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:
- Paving cut and lift: 45 linear ft. × C$19.00 = C$855.00.
- Trench excavation: 45 linear ft. × C$14.00 = C$630.00.
Adding all 7 rounded line amounts gives C$6,020.00. 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 |
|---|---|---|---|
| Levels and outlet survey | 1 job | C$255.00 | C$255.00 |
| Paving cut and lift | 45 linear ft. | C$19.00 | C$855.00 |
| Trench excavation | 45 linear ft. | C$14.00 | C$630.00 |
| Channel and grate allowance | 45 linear ft. | C$51.00 | C$2,295.00 |
| Drain connection parts | 1 job | C$380.00 | C$380.00 |
| Channel setting labour | 45 linear ft. | C$24.00 | C$1,080.00 |
| Paving reinstatement and clean | 1 job | C$525.00 | C$525.00 |
| Illustrative subtotal | C$6,020.00 | ||
Scope and pricing boundaries
Install a surface drainage channel along an existing paved patio edge and connect to a confirmed suitable outlet.
Outside this example: No new soakaway, sewer repair or large-area repaving.
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 channel run, paving cut length, invert level and available outlet route.
- Keep channel units, grates and pipe fittings distinct from excavation and reinstatement.
- Confirm outlet permissions and levels before cutting paving.
- No workable outlet or insufficient fall requires redesign rather than an assumed connection.
Check the business, client, property, dates, line extensions and notes. The patio drainage channel installation 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 patio drainage channel installation estimate?
Measure channel run, paving cut length, invert level and available outlet route.
When should this patio drainage channel installation quote be revised?
No workable outlet or insufficient fall requires redesign rather than an assumed connection. No new soakaway, sewer repair or large-area repaving.
MAKE THE NEXT ESTIMATE YOUR OWN
Build a patio drainage channel installation 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.
