Cost to Power Wash a House: Per-Sq-Ft Prices and Add-Ons

Most homeowners pay somewhere between $300 and $700 to have a typical single-story home professionally washed, and the power wash house cost climbs from there with height, square footage, and the kind of siding on the walls. Contractors usually quote in one of three ways: a price per square foot of wall surface, a flat price based on the home’s footprint and story count, or a minimum trip charge plus add-ons. Knowing which method your quote uses is the fastest way to compare bids fairly.

As a rough rule, expect about $0.15 to $0.40 per square foot of exterior wall for a standard wash on vinyl or fiber cement, and $0.30 to $0.75 per square foot when the job needs soft washing, heavy mildew treatment, or extra ladder work. A 2,000-square-foot two-story home often lands in the $400 to $900 range for the house alone. Driveways, decks, fences, and gutters are priced separately and can double the final invoice if you add several at once.

The rest of this guide breaks down those numbers by story count and siding material, explains what the common surcharges actually cover, and runs the math on renting a machine and doing it yourself so you can decide which route makes sense.

Average Power Wash House Cost by Home Size and Stories

Square footage drives the base price, but story count is the multiplier most people underestimate. A second story means taller ladders, longer wand extensions, more hose, and slower production. Many crews add 25 to 50 percent for a two-story home and more for a three-story or a house on a steep lot where ladders can’t be set level.

Wall area and floor area are not the same thing. A contractor measuring pressure washing per sq ft is usually counting the siding surface, which on a two-story colonial can be close to double the home’s living space. If one bid is quoted per square foot and another is a flat fee, ask the per-square-foot bidder what total wall area they measured before comparing.

How Siding Type Changes the Price

Different exterior materials tolerate different pressures and chemicals, which changes the method, the labor time, and ultimately the invoice.

• Vinyl siding: The cheapest to wash. It handles a low-pressure rinse after a detergent application, and most jobs finish quickly. Expect the low end of the ranges.
• Fiber cement: Similar to vinyl in cost. Crews avoid high pressure near cut edges and trim joints to keep water out of the wall.
• Aluminum siding: Often needs extra scrubbing to remove chalky oxidation, which adds labor. Budget 10 to 20 percent more than vinyl.
• Wood siding and shakes: Requires careful low-pressure or soft-wash methods to avoid raising grain or stripping stain. Prices run mid-to-high.
• Brick and stone: Durable but porous. Efflorescence, moss, or heavy staining may call for specialty cleaners, pushing costs toward the top of the range.
• Stucco and EIFS: Almost always soft-washed because high pressure can crack or gouge the finish and force water behind it. Expect a soft-wash price.

Soft Wash Surcharges and Other Add-Ons

Soft washing uses a low-pressure pump to apply a diluted cleaning solution that kills mildew, algae, and lichen, then rinses gently. It costs more than a basic pressure rinse because of the chemicals, the dwell time, and the plant protection involved. A soft-wash surcharge of 15 to 35 percent over a standard wash is common, though some companies simply quote soft washing as their default service.

Other line items you may see on a pressure wash estimate include:

• Heavy mildew or algae treatment: An extra $50 to $200 on north-facing or heavily shaded walls.
• Rust, clay, or irrigation stains: Specialty stain removers typically add $50 to $150 per area.
• Gutter exterior brightening: Removing the black “tiger stripes” on gutter faces runs roughly $100 to $250.
• Window rinsing: Some crews include a basic rinse; spot-free window cleaning is a separate service.
• Trip or minimum charge: Small homes often cost the same as a mid-size one because the company has a $200 to $350 minimum.

Cost to Pressure Wash a Driveway, Deck, and Other Surfaces

Flatwork and outdoor structures are usually priced per square foot on their own line. Bundling them with the house wash often earns a discount because the crew is already set up.

• Driveway: About $0.10 to $0.35 per square foot, so a two-car driveway typically falls between $100 and $250. Surface cleaners make concrete fast work, and oil stains add cost.
• Sidewalks and patios: Similar per-square-foot pricing to driveways; pavers cost more if joint sand needs replacing afterward.
• Wood deck: Roughly $0.25 to $0.60 per square foot for cleaning alone, or $1.50 to $3.50 per square foot if you add brightening and staining.
• Fence: Commonly $1 to $3 per linear foot depending on height and whether both sides are cleaned.
• Roof soft wash: A separate specialty service, often $0.20 to $0.60 per square foot of roof, and not something to combine with high pressure.

If you ask for the average cost to power wash a house plus driveway and deck, a mid-size two-story home frequently totals $700 to $1,400.

DIY Rental Math: Is Doing It Yourself Cheaper?

Renting a gas pressure washer from a home center or equipment yard typically costs $50 to $100 for four hours or $75 to $150 for a full day. Add $20 to $50 for house-wash detergent, $15 to $40 for an extension wand or soft-wash nozzle kit, and fuel. A one-story house can realistically be washed in a single day by a first-timer, so the out-of-pocket cost often runs $120 to $250.

That saves a few hundred dollars on a simple ranch home. The math tilts the other way on a two-story house. You’ll need a sturdy extension ladder or a long telescoping wand, and you’ll likely spend two days instead of one. Mistakes also get expensive: forcing water behind vinyl laps, etching wood, blowing out window seals, or stripping paint can cost more to fix than the professional wash would have.

A quick decision guide

1. One-story vinyl or fiber cement with light dirt: DIY is reasonable if you’re comfortable with a machine and keep pressure low.
2. Two stories or taller: Hire out unless you have a telescoping soft-wash setup and never need to spray from a ladder.
3. Stucco, EIFS, old wood, or painted surfaces: Hire a soft-wash specialist to avoid gouging or stripping.
4. Heavy mildew across the whole house: A pro with a soft-wash rig will usually finish faster and cleaner.
5. Driveway only: DIY with a rented surface cleaner is often the best value.

What Affects Your Quote Beyond Square Footage

Two homes of identical size can get very different bids. Access is a big factor: tight side yards, fenced areas, landscaping beds against the foundation, and steep grades all slow a crew. Water access matters too, since the crew needs a working spigot with decent flow, and some rural jobs require hauling water.

Regional labor rates swing prices by 20 to 40 percent between low-cost and high-cost metro areas. Seasonality plays a part as well; spring is peak demand, and some companies offer lower rates in late fall or bundle discounts for booking early. Finally, the condition of the house matters. A home that hasn’t been washed in ten years takes longer than one cleaned every other spring.

Troubleshooting Common Quote and Result Problems

Price disputes and disappointing results usually trace back to a few issues you can avoid up front.

• Bid seems too low: Ask whether it includes soft washing, plant protection, and gutter faces. A bargain rinse may leave mildew roots behind so growth returns within months.
• Streaks or green spots return quickly: The cleaning solution likely wasn’t strong enough or didn’t dwell long enough. Ask about a re-treat guarantee before booking.
• Water inside the house: Usually caused by spraying upward under siding laps or directly at windows. Reputable crews spray downward and at an angle.
• Damaged plants: Ask how the crew pre-wets, rinses, or covers landscaping when using cleaning solutions.
• Oxidation left on aluminum or painted siding: Chalky residue needs scrubbing or a specific cleaner, which may not be in a basic wash price.

Safety Considerations Before You DIY or Hire

A pressure washer’s stream can cut skin and inject water or debris under it, which is a medical emergency even when the wound looks minor. Never point the wand at people or pets, keep both hands on the gun, and wear eye protection and closed-toe shoes. Avoid spraying electrical fixtures, outdoor outlets, meters, and the service drop; cover exterior outlets and lights before washing.

Ladders and pressure washers are a risky mix because the kickback from the wand can push you off balance. Stay on the ground with an extension wand whenever possible, and leave second-story and higher work to a crew with proper equipment. If your home was built before 1978 and has painted siding or trim, have peeling paint tested for lead before any pressure washing, because blasting loose paint can spread lead-contaminated chips across the yard.

When to Call a Pro

Hire a professional for any home over one story, for stucco, EIFS, or aged wood, for roof cleaning, and for houses with extensive mildew or oxidation. Look for a company that carries general liability insurance, explains whether it uses soft washing or pressure, and puts plant protection and a re-clean policy in writing. Getting two or three itemized bids that list wall area, add-ons, and the cleaning method is the best way to keep your power wash house cost predictable and avoid surprises on the final bill.