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Chemical cost per car is an average of the wash packages, meaning a base wash may for instance cost around $.45 in chemicals and a top wash more around $1.20 with our average being $.64 per car.Detergent costs also vary by supplier and discount levels, which are often based on order volume.lectricity has some efficiency when busy, when motors keep running they cost less than starting and stopping them. Therefore on a busy day the electric cost per car may be $.25 / car, but when starting up all motors for one car may be $1.00 / car, as the $.50 / car is an average.
Get an INSTANT estimate of the cost to Power Wash Driveway! Our free calculator uses recent, trusted data to estimate costs for your Driveway Power Washing project. For a basic 500 square feet project in zip code 47474, the benchmark cost to Power Wash Driveway ranges between $0.26 - $0.50 per square foot* .To estimate costs for your project: 1.ur free calculator uses recent, trusted data to estimate costs for your Driveway Power Washing project. For a basic 500 square feet project in zip code 47474, the benchmark cost to Power Wash Driveway ranges between $0.26 - $0.50 per square foot* . To estimate costs for your project: