WindowBossPro Blog — Quotes & Estimates

Common Window Cleaning Quoting Mistakes and How to Avoid Them

Most window cleaning quotes do not go wrong because the owner is bad at math. They go wrong because something was missed, assumed or forgotten. The same handful of mistakes shows up over and over, and each one has a simple fix.

Small Misses, Big Costs

In Writing Window Cleaning Estimates Customers Actually Understand we made estimates clear. Clarity does not help if the numbers behind them are wrong. Here are the mistakes that cost window cleaners the most, and how to avoid them.

1. Counting Only the Front

The front of a house is what you see from the street. The back is where the sunroom, the wall of sliders and the walk-out basement live. A curb count can easily miss a third of the glass.

Fix: get eyes on every side. Walk the side yard with permission, ask the customer for photos of the back, or do a walkthrough on bigger homes. If you quote from the front, say so on the estimate and confirm on the first visit. More in Counting Windows for an Estimate: From the Curb, From Photos or on a Walkthrough.

2. Ignoring Height

Twelve upper windows take longer than twelve ground-floor windows. Quoting them at the same price means the second story is subsidized by the first.

Fix: count upper windows separately and use a story add-on. Record the story height on the job so the crew brings the right ladders.

3. Leaving Extras Implied

If screens are not on the estimate, many customers assume they are included. The same goes for tracks and inside sills.

Fix: list every extra on its own line, and add a note for what is not included: “Screens and tracks not included.”

4. Treating Hard Water Like Dirt

Hard-water spots do not come off with a normal clean. Folding them into the regular price means either a job that runs hours long or a customer disappointed that the spots are still there.

Fix: quote hard-water removal separately, name the windows, and set honest expectations about etched glass.

5. No Minimum Job Charge

A six-window job still needs a drive, a setup and an invoice. Without a minimum, small jobs lose money.

Fix: work out a minimum from your real costs and put it on your service list so everyone uses it.

6. Different Prices From Different People

The owner quotes $220. The new hire quotes the same house at $180. The customer's neighbor, who talked to the owner, is now annoyed.

Fix: build every estimate from one service list and write down your counting rules. In WindowBossPro, estimates add up from the list, so two people quoting the same house get the same number.

7. Losing the Details After the Yes

The quote was right, but the window count lived on a notepad, the gate code in a text, and the “three stories on the back” in the owner's head. The crew shows up blind.

Fix: record window details on the job: number of windows, stories, sides, extras and access notes. In WindowBossPro, the approved estimate becomes the scheduled job, and details entered on the job once show on the tech's phone every visit after that: “28 windows · 2-story · Inside & Outside · Screens.”

8. Quoting Slowly

A prospect who requests a quote is often asking two or three companies. The one that answers first with a clear number has an edge.

Fix: check Form Responses daily, acknowledge every request quickly and send estimates the same day when you can.

9. Never Following Up

Many unanswered quotes are not a no. The customer just got busy.

Fix: a short follow-up rhythm by text: a check-in a few days later, a nudge a week later, a polite close-out after that.

10. Not Offering a Plan

A one-time quote with no recurring option leaves steady work on the table.

Fix: show a per-visit recurring price next to the one-time price on every residential estimate.

11. Forgetting Access Until the Crew Arrives

A locked side gate, an unfriendly dog or a skylight that needs roof access can turn a smooth job into a wasted trip.

Fix: ask about access on every quote and write it in the access notes on the job, where the tech sees it before getting out of the van.

12. Not Revisiting Old Prices

Prices set three years ago may not cover today's fuel, wages and insurance. Recurring customers on old rates slowly become your least profitable stops.

Fix: review your service list once a year, update it for new quotes, and give existing customers notice before changing their plan prices.

Habits Beat Talent

None of these fixes require special skill. They require a service list, written counting rules, details saved on the job and a few minutes of follow-up each week. For the full quoting workflow in WindowBossPro, see the window cleaning estimate software page.