Pressure washing
Parking Lot Pressure Washing Cost Calculator
Prices parking lot cleaning, where the oil and the runoff are the two real problems.
Result
A planning estimate, not a quote. Access, the age of the equipment, what is found once it is opened up and local labour rates all move the real figure, sometimes a long way.
Get a Free Business AuditHow the calculation works
Hours times crew times rate, plus chemicals, disposal and the call-out, by area. A parking lot is a large flat area where equipment productivity governs the labour, so a wide surface cleaner and adequate flow matter more than anything else. The two complications are that the dirt is largely automotive, meaning oil and grease that need degreasers and dwell rather than pressure, and that the runoff therefore carries exactly the contaminants that discharge rules are concerned with.
What moves the number
- Area and equipment width, which determine how long it takes.
- Oil and grease loading, especially in parking bays and at entrances.
- Whether the surface is asphalt or concrete, which sets the usable pressure.
- Containment and disposal requirements for contaminated runoff.
Where this one goes wrong
Most parking lots are asphalt, which will not take the pressure that concrete does: high pressure erodes the binder, loosens aggregate and can leave permanent marks, so an operator who cleans concrete loading bays at full pressure has to dial back for the lot itself. Oil is chemistry rather than force, and degreasing with dwell time is what lifts it. The runoff from this work is the most contaminated in the trade, carrying hydrocarbons and heavy metals from vehicle wear, which is why containment and recovery matter here most of all. Working around traffic and pedestrians needs a traffic plan and closures rather than cones and hope.
Before you quote
- Reduce pressure for asphalt compared with concrete.
- Degrease oil with dwell time rather than attacking it with pressure.
- Contain and recover runoff, which here is the most contaminated.
- Plan traffic and pedestrian management with proper closures.
Where the rules come from
Questions
About this calculator
Can asphalt parking lots be pressure washed?
At lower pressure than concrete. High pressure erodes the binder and loosens the aggregate, leaving permanent damage. The same settings that clean a concrete loading bay will take material off asphalt, so the machine has to be adjusted for the surface.
How are oil stains removed from a parking lot?
With a degreaser applied and left to dwell so it lifts the oil out of the surface, then washed. Pressure alone does not remove oil and on asphalt it damages the surface while leaving the stain. The chemistry and the dwell time do the work.
Does parking lot runoff need containing?
It is the most contaminated runoff in this trade, carrying hydrocarbons and metals from vehicle wear, so in many jurisdictions it cannot be discharged to a storm drain. Containment, recovery and proper disposal are the compliant approach and a real part of the cost.
The formula
total = hours x people x rate + parts + call-out, then sales tax
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How to use this calculator
- Hours on site (h). Enter your own figure; the page starts at 3 h.
- People needed. Enter your own figure; the page starts at 1.
- Labour rate charged ($). Enter your own figure; the page starts at $95.
- Parts and materials ($). Enter your own figure; the page starts at $35.
- Call-out or diagnostic fee ($). Enter your own figure; the page starts at $95.
- Sales tax (%). Leave at zero if you are quoting before tax.
The result updates as you type, so you can try a figure, see what it does to estimated total, and change it back. Nothing you enter is sent anywhere or saved.
A worked example
These are the figures the calculator opens with. Every number in the results column below is produced by the same calculation the page runs, so you can follow it through before putting your own figures in.
What goes in
| Input | Value |
|---|---|
| Hours on site | 3 h |
| People needed | 1 |
| Labour rate charged | $95 |
| Parts and materials | $35 |
| Call-out or diagnostic fee | $95 |
| Sales tax | 0% |
What comes out
| Result | Value |
|---|---|
| Estimated total main result | $415 |
| Labour | $285 |
| Before tax | $415 |
| Sales tax | $0 |
About $415: $285 of labour, $35 of parts and a $95 call-out.
How sensitive the answer is
Holding everything else steady and changing only labour rate charged, this is what happens to estimated total. It is worth knowing which of your inputs the answer actually hinges on, and which barely move it.
| Labour rate charged ($) | Estimated total |
|---|---|
| $48 | $274 |
| $71 | $343 |
| $95 example above | $415 |
| $143 | $559 |
| $190 | $700 |
Every other input is held at the example value while this one changes, which is not how a real job behaves. Treat it as a guide to which number matters most, not as five separate quotes.
What each figure means
- Hours on site (h)
- Measured in h, between 0 and 400, starting at 3 h.
- People needed
- A number, between 0 and 40, starting at 1.
- Labour rate charged ($)
- A money amount, starting at $95.
- Parts and materials ($)
- A money amount, starting at $35.
- Call-out or diagnostic fee ($)
- A money amount, starting at $95.
- Sales tax (%)
- Leave at zero if you are quoting before tax.
What the results tell you
| Result | What it is |
|---|---|
| Estimated total | The headline result. A money figure. |
| Labour | A money figure. |
| Before tax | A money figure. |
| Sales tax | A money figure. |
Estimating is the easy part
The jobs you never hear about cost more than the ones you mis-measure. BDEVY builds the marketing, systems and automation that bring them in.