THE ESTIMATING ANSWER
For six existing lighting circuits, start with a defined scope and measurement basis. Count circuits and gangs, record lamp type, load and existing switch-box capacity. Specify dimmer product by compatibility rather than a generic switch price. Price the listed tasks separately and state the condition that would require a revision: Incompatible drivers or missing required conductors change equipment choice.
This guide uses a fictional project in Saskatoon, Saskatchewan: Six existing lighting circuits. 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 six suitable existing wall switches with selected compatible dimmers, then test operation with the connected lamps. Count circuits and gangs, record lamp type, load and existing switch-box capacity. 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: Count circuits and gangs, record lamp type, load and existing switch-box capacity.
2. Build a product and labour schedule
Specify dimmer product by compatibility rather than a generic switch price. This example has 7 distinct lines, including circuit compatibility survey, existing switch removal, dimmer product allowance. Use actual supplier prices and labour inputs for a customer job; the displayed amounts are fictional document inputs.
Selections to confirm: Specify dimmer product by compatibility rather than a generic switch price.
3. Sequence the work and handoffs
Verify supply isolation and trial one representative circuit first. 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: Verify supply isolation and trial one representative circuit first.
4. Set a change boundary
Incompatible drivers or missing required conductors change equipment choice. The example excludes new lighting circuits, wall rewiring or luminaire replacement. Record the discovery, agree the revised work and update the estimate before adding it to the job.
If the job changes: Incompatible drivers or missing required conductors change equipment choice.
Review the Canadian job address
Have the actual supply route, mounting and testing reviewed by the qualified person doing the work. Confirm any approval or inspection requirements for the project address before issuing a final price.
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 Saskatoon, Saskatchewan 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:
- Existing switch removal: 6 each × C$47.00 = C$282.00.
- Dimmer product allowance: 6 each × C$115.00 = C$690.00.
Adding all 7 rounded line amounts gives C$2,559.00. 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 |
|---|---|---|---|
| Circuit compatibility survey | 1 job | C$255.00 | C$255.00 |
| Existing switch removal | 6 each | C$47.00 | C$282.00 |
| Dimmer product allowance | 6 each | C$115.00 | C$690.00 |
| Back-box parts allowance | 1 job | C$160.00 | C$160.00 |
| Dimmer fitting labour | 6 each | C$130.00 | C$780.00 |
| Lamp and control test | 6 each | C$47.00 | C$282.00 |
| Labelling and cleanup | 1 job | C$110.00 | C$110.00 |
| Illustrative subtotal | C$2,559.00 | ||
Scope and pricing boundaries
Replace six suitable existing wall switches with selected compatible dimmers, then test operation with the connected lamps.
Outside this example: No new lighting circuits, wall rewiring or luminaire replacement.
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
- Count circuits and gangs, record lamp type, load and existing switch-box capacity.
- Specify dimmer product by compatibility rather than a generic switch price.
- Verify supply isolation and trial one representative circuit first.
- Incompatible drivers or missing required conductors change equipment choice.
Check the business, client, property, dates, line extensions and notes. The dimmer switch 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 dimmer switch installation estimate?
Count circuits and gangs, record lamp type, load and existing switch-box capacity.
When should this dimmer switch installation quote be revised?
Incompatible drivers or missing required conductors change equipment choice. No new lighting circuits, wall rewiring or luminaire replacement.
MAKE THE NEXT ESTIMATE YOUR OWN
Build a dimmer switch 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.
