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 six existing lighting circuits as a worked, fictional job. Its matching itemized estimate and PDF let you trace the advice to actual document lines. The role considered here is electrical contractor. Confirm the site conditions, product selections and your own costs 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 labor 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 labor 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.
Worked project calculation
The example line for existing switch removal is 6 each × $35.00 = $210.00. This line is one part of the complete 7-item estimate and uses a fictional unit rate.
The paired estimate has 7 separate lines. For this fictional job, multiply each quantity by its unit price and add the line amounts to get $1,890.00. The sample PDF uses these exact values, with tax and markup left at zero so the arithmetic is visible. This total is an illustration, not a regional price or an offer to perform the work.
| Cost line | Quantity | Unit price | Line amount |
|---|---|---|---|
| Circuit compatibility survey | 1 job | $190.00 | $190.00 |
| Existing switch removal | 6 each | $35.00 | $210.00 |
| Dimmer product allowance | 6 each | $85.00 | $510.00 |
| Back-box parts allowance | 1 job | $120.00 | $120.00 |
| Dimmer fitting labor | 6 each | $95.00 | $570.00 |
| Lamp and control test | 6 each | $35.00 | $210.00 |
| Labelling and cleanup | 1 job | $80.00 | $80.00 |
| Illustrative subtotal | $1,890.00 | ||
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.
Separately identify supplier allowances, labor, subcontracted work and site-specific risk where they apply. Before giving a selling price, decide how your own overhead, profit and any applicable tax will be handled. Do not copy the fictional rates into a real quote without checking your own measurements and supplier or subcontractor figures.
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.
Read the complete dimmer switch installation PDF example to see how the scope, individual prices and exclusions appear in a client-facing document. If a condition is still unknown, write that boundary into your estimate and revise the affected line once it is resolved.
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.
TURN THIS EXAMPLE INTO YOUR OWN ESTIMATE
Build a dimmer switch installation estimate for your project
Use Estimates on iPhone or Android to draft a scope with AI assistance or enter each line yourself. Review quantities, rates, exclusions, and client details before exporting a PDF. The example is free to inspect; some app features may require an in-app purchase.
