Pressure Washing Cost Calculator

Pressure washing typically costs about $0.15–$0.50 per square foot, so washing 1,500 square feet of house siding runs roughly $450 — with most jobs subject to a minimum service charge of around $175. The formula the calculator runs is: total = area × rate per sq ft × surface × stories × soiling, with a minimum floor. Pressure washing is a pure service — there's no material to buy — so unlike most trades, your region scales the entire price, not just part of it. This guide walks the exact math and a worked example. Every figure is an estimate, not a quote.

It's Priced by the Square Foot — by Surface

Pressure washing is sold by the square foot, but the rate depends on the surface. Patios and walkways are the cheapest at the low end of the range. Driveways are a touch more. House siding is the mid-range reference. Decks and fences cost more because the wood needs a gentler, more careful wash, and roofs cost the most — they're done with a low-pressure 'soft wash' and they're slow and risky to reach.

The calculator prices the surface as a multiplier on an editable base rate, so switching surfaces moves the per-square-foot cost directly. Enter your area and pick the surface, and the estimate updates as you type.

• ~$0.15–$0.50 per sq ft depending on surface
• Patio < driveway < siding < deck < roof (per sq ft)
• Roofs use a low-pressure soft wash — slowest and priciest

Stories, Soiling, and Recurring Service

Three factors move the rate beyond the surface. Height adds cost: a two- or three-story job needs ladders, extension equipment, and more setup and care, so the calculator adds about 25% per story over one. Heavy soiling — years of grime, algae, or mildew — needs extra passes and sometimes a pre-treatment, so it adds roughly 30%.

On the other side, recurring service is cheaper per visit. If you set up a regular schedule, the calculator applies a discount, because a maintained surface is faster to clean and the crew is already routing to your neighborhood.

• Each story over one adds ~25% (ladders, setup, risk)
• Heavy soiling adds ~30% (extra passes, pre-treatment)
• Recurring service earns a discount vs a one-time clean

A Pure Service: Region Scales the Whole Job

Most home-improvement costs split into materials and labor, where only the labor varies by region. Pressure washing is different: there's no material to buy — it's all labor, water, and a bit of detergent. So the calculator scales the entire price by your region, the same way it does for a service like tree removal.

That means picking a higher-cost state raises the whole estimate proportionally, not just a slice of it. It's the one honest exception to the usual rule that your region only moves the labor lines.

• No commodity material — pressure washing is pure labor
• Region scales the whole job (like tree removal)
• The one tool where region moves the entire price

The Minimum Service Charge

Almost every pressure-washing company has a minimum charge — usually around $150–$200 — because rolling a truck, crew, and equipment to your home costs the same whether you're washing 200 square feet or 800. The calculator applies a minimum floor so a small job doesn't show an unrealistically tiny number.

The practical takeaway: bundle surfaces. If you're paying the minimum for a small driveway, adding the patio or the siding in the same visit dramatically lowers your effective cost per square foot.

• Minimum service charge ~$150–$200 per visit
• Small jobs hit the minimum — the per-sq-ft rate doesn't apply below it
• Bundle surfaces in one visit to lower the cost per sq ft

Worked Example: 1,500 sq ft of Siding

Take 1,500 square feet of single-story house siding with light, routine soiling, a one-time service, at the national-average region.

The rate is the $0.30 siding base, so 1,500 × $0.30 = $450. There are no story, soiling, or service adjustments, and $450 is well above the $175 minimum, so the total is $450 — exactly $0.30 per square foot. Switch to a roof and the rate jumps to $0.45 a foot ($675); add heavy soiling and it's about $585; make it a two-story house and it's around $563.

• 1,500 sq ft × $0.30 siding rate = $450 ($0.30/sq ft)
• Above the $175 minimum, so the per-sq-ft rate applies
• Roof ~$675 · heavy soiling ~$585 · two stories ~$563

Why the Total Is a Range

Pressure-washing prices vary with access, water source, and how stubborn the grime is, so the calculator brackets the realistic figure with a low end at 0.85x and a high end at 1.25x. The upside covers tough stains that need pre-treatment, hard-to-reach areas, and surfaces that need a gentler, slower approach.

If you're also having the driveway done, the Driveway Cost Calculator helps you budget a repave or seal once it's clean. Budget toward the middle for routine maintenance washing and toward the top for a heavily soiled or hard-to-reach job — and always confirm with an on-site quote.

• Low = realistic x 0.85 · high = realistic x 1.25
• Upside covers stubborn stains, access, and delicate surfaces
• Heavy soiling and multi-story homes push toward the high end

The bottom line

Pressure washing is priced by the square foot, and the surface sets the rate — patios cheapest, roofs most — with adders for extra stories and heavy soiling and a discount for recurring service. Because it's a pure service with no material, your region scales the entire job, not just the labor. And a minimum service charge floors small jobs, so bundling surfaces is the easiest way to cut your cost per square foot. The Pressure Washing Cost Calculator runs all of it and returns a total and a cost per square foot with an honest low-to-high range — a planning number to size up the job and read a washer's quote against, not a guaranteed bid.