Why Your Power Washing Estimates Are Costing You Money

I ran a power washing business for years before I realized I was underpricing about 40% of my jobs. Not by a little — by $200 to $500 per house. The problem was not that I did not know my rates. I knew my rates fine. The problem was that I was pricing every house the same way regardless of the siding type. A 2,000 square foot vinyl-sided ranch and a 2,000 square foot brick colonial are not the same job. The brick takes more chemical, more time, more care, and more risk. But I was quoting them at the same per-square-foot rate because I did not have a system that differentiated. I was eyeballing it from the truck and rounding to the nearest fifty. That rounding cost me about $35,000 in a single season once I went back and did the math.

Here is the reality of surface-type pricing that most operators learn the hard way. Vinyl siding is your baseline — it is the fastest to clean, uses the least chemical, and has the lowest risk of damage. Brick takes 20–30% more time because you are dealing with mortar joints that hold dirt, efflorescence, and biological growth that requires higher dwell times. Stucco is even more demanding — the textured surface traps contaminants and you cannot use high pressure without risking damage, so you are relying on longer chemical dwell times and softer rinse passes. Concrete and wood each have their own profiles. If you are using one rate for all of them, you are overpricing vinyl (losing bids you should win) and underpricing brick and stucco (winning bids you should not want at that price). The fix is simple: set a separate per-square-foot rate for each siding type. When you know the siding type before you quote — which is possible with property data pulls — the right rate loads automatically and you stop guessing.

When I started building estimating software for my own crew, the first feature I added was a real-time margin calculator. Not a report you look at after the month is over — a live badge on every estimate that shows your margin percentage as you build the quote. Green means you are at or above your target margin. Yellow means you are within 5% of your floor. Red means you are below your minimum — you are about to lose money on this job. The first week I used it, I caught three estimates that would have gone out at margins below 20%. Two of them were brick houses where my old flat rate did not account for the extra time and chemical. One was a three-story home where I forgot to apply my height multiplier. Those three catches alone were worth $740 in additional revenue that I would have left on the table. Multiply that across a full season and you are looking at $15,000–20,000 in recovered margin. That is the difference between a good year and a great year.

The old way of estimating a house wash goes like this: drive to the property, walk around, eyeball the square footage, guess the siding type from memory, scribble some numbers on a notepad or punch them into a phone calculator, and text the customer a price. Maybe you write it up nicely when you get home. Maybe you do not. The whole process takes 20–45 minutes when you include the drive time and the follow-up. And the accuracy depends entirely on how good your eyeball is that day. The new way takes 47 seconds. You type the address. The property data pulls automatically — square footage, siding type, stories, lot size. Your per-surface rates load. You see the margin badge. You adjust if needed, add any upsells, and send a branded PDF. You can do it from the truck, from the couch, or from the office. The estimate is consistent, accurate, and professional every single time.

Good estimating is not about charging more. It is about charging accurately. When you know your true cost on every job — labor, chemical, equipment wear, drive time, insurance — and you see that cost reflected in the margin badge on every estimate, you stop guessing and start running a business. You win the vinyl jobs you should win because your rate is competitive for that surface type. You price the brick and stucco jobs accurately so you actually make money on them. You catch the underpriced estimates before they go out. You stop leaving margin on the table and you stop winning unprofitable work. That is the shift. It is not about working harder or charging more. It is about knowing your numbers on every single estimate, every single time, without spending 30 minutes on each one.