Your siding looks tired. The north-facing wall is going green, the gutters are streaked, and the corner under the oak tree has gone gray. You suspect a power wash would solve most of it, but every quote comes back different and every YouTube tutorial promises you can do it yourself in a weekend. The real question is whether the price tag justifies the Saturday, the ladder, and the risk of carving stripes into your siding.
How much does it cost to power wash a house? Most homeowners pay between $200 and $600 to have their house power washed, with a national average around $300 for a single-story home of about 2,000 square feet. Two-story homes, brick or stucco exteriors, and heavy mildew can push that figure into the $500 to $900 range. This guide walks you through every cost lever so you can read a quote line by line, compare it against a real DIY math, and know when soft washing is the only safe option.
If you decide the project belongs with a pro, your local Ace Handyman Services office offers power washing services that cover the whole exterior envelope, including the add-ons most quotes hide. If you decide to tackle it yourself, the breakdowns below tell you exactly what to rent, how to sequence the work, and where DIYers most often damage their siding.
Pricing varies by location. Ace Handyman Services works on a time and materials basis, and each location is independently owned and operated and sets its own rates. The figures below are general guidance for planning only.
Quick Overview: National Cost Range for Power Washing a House
Power washing pricing looks chaotic until you understand the three models contractors use. Once you know which one applies to your house, the quotes start to make sense.
Average Cost
National average sits around $300 for a single-story home in the 1,800 to 2,200 square foot range with vinyl or fiber cement siding. Add a story, swap to brick or stucco, or fold in moderate mildew remediation, and the average climbs to roughly $450. Heavy organic growth, three stories, or a wraparound porch can push past $700.
Typical Range
Most quotes land between $200 and $600. The floor covers a small ranch with clean siding and easy access. The ceiling covers a two-story home with mixed materials, moderate algae, and a partial roof rinse.
Pricing Models (per sq ft, per linear ft, flat-rate)
Contractors price three ways, depending on the region and the size of the operation:
- Per square foot of wall surface: $0.15 to $0.40 is typical. This is the most transparent model and the one to ask for when you call.
- Per linear foot of perimeter (used by some crews for ranch homes): $1 to $3 per linear foot.
- Flat-rate by package: a single-story package, a two-story package, an add-on for gutters, an add-on for the roof. Easier to compare, harder to verify.
At a glance, a 2,000-square-foot exterior wall area at $0.25 per square foot lands at $500. That matches up with what the average two-story quote actually looks like in most markets.
Cost Breakdown by Home Size
House size drives the quote more than any other single variable. The catch is that the relevant measurement is wall square footage, not floor square footage, and most homeowners do the math wrong on the first call.
Small Homes (Under 1,500 sq ft)
A single-story ranch or starter home with vinyl siding typically runs $150 to $300. Quotes drop fast at this size because crews can finish in under two hours and rarely need to break out the extension wand.
Mid-Size Homes (1,500 to 2,500 sq ft)
This is the bulk of the market. Single-story homes in this range land between $250 and $450. Two-story homes in the same square footage often jump to $400 to $650 because of access time, not because the surface area is dramatically different.
Large Homes (2,500 to 4,000 sq ft)
Large homes start at $500 and climb past $900. Expect surcharges for second-story dormers, decorative gables, and any wall section the crew can only reach from a ladder rather than the surface cleaner or extension wand.
Two-Story and Three-Story Surcharges
The story count surcharge is real and rarely itemized. A two-story upcharge typically runs 30 to 50 percent over the comparable single-story price. Three stories or any home with a turret or unusual roofline can double the base quote. The driver is access time and equipment, not extra square footage.
Cost Breakdown by Siding Material
Your siding determines whether a crew can use full pressure or has to switch to a soft wash. That choice changes the price, the time on site, and the equipment list.
Vinyl Siding
Vinyl is the friendliest surface and the cheapest to wash. $0.15 to $0.30 per square foot. Vinyl tolerates higher pressure than most homeowners realize, but the panels do hold dirt under the lap joints, so a detergent dwell and a soft-wash rinse usually beats raw pressure.
Brick and Block
Brick tolerates pressure but the mortar joints do not. Older homes with soft lime mortar can lose pointing in seconds at the wrong tip. Expect $0.20 to $0.40 per square foot, with a careful crew using a 25-degree tip and standing well off the wall.
Stucco and EIFS
Stucco is the most expensive substrate to wash correctly. Traditional cement stucco can take low to moderate pressure with a wide tip. EIFS, the synthetic stucco system, cannot take pressure at all and absolutely requires a soft wash. Plan on $0.30 to $0.60 per square foot, and refuse any quote that does not specify the method.
Wood Siding and Cedar Shake
Wood is fragile. Aggressive pressure raises the grain, etches the soft early-wood, and strips stain in stripes that will haunt you for years. Soft wash is the standard, with a follow-up brush in tight spots. Expect $0.30 to $0.50 per square foot.
Fiber Cement
Fiber cement (HardiePlank and similar) takes pressure well and washes up clean. $0.15 to $0.30 per square foot is typical. Watch the painted finish; abrasive tips on a high-PSI machine can dull the factory paint over time.
Assessing Your House Before You Get a Quote
Five minutes of walking the perimeter saves you from the two most common quote-day surprises: a measurement mismatch and an upsell you could have predicted.
Measuring Square Footage of Walls (Not Floor)
Multiply the perimeter of your house by the wall height. A 40-by-30-foot ranch with 9-foot walls has a perimeter of 140 feet and roughly 1,260 square feet of wall, not 1,200. Two-story homes double up; subtract a token for windows and doors if you want a tighter number, but most crews quote off the gross wall area.
Identifying Stains, Mildew, and Algae
Walk the shaded sides. Green tint is algae and needs a sodium hypochlorite or biocide treatment. Black streaks are mildew and need the same chemistry. Red iron staining at the base often comes from sprinkler heads and needs an oxalic acid spot treatment, which is usually a separate line item.
Spotting Damage Before You Spray
Look for cracked caulk at trim, lifted siding nails, loose flashing, soft wood at corners, and any opening you would not want water driven into. Photograph anything questionable before the crew arrives so you have a record. Reputable crews will mark damage and skip those zones.
Equipment and Materials That Drive DIY Cost
If you are weighing DIY, the rental shop is only the start. The true math includes detergent, attachments, ladders, safety gear, and a realistic Saturday.
Power Washer Rental or Purchase
Residential power washer rental runs $75 to $150 per day. A homeowner-grade gas machine in the 3,000 PSI range costs $400 to $700 to buy. Anything under 2,000 PSI is a glorified garden hose for siding work. Anything over 3,500 PSI in untrained hands is a damage event waiting to happen.
PSI and GPM Requirements by Surface
PSI is pressure; GPM (gallons per minute) is flow. GPM does the cleaning. Two machines at 3,000 PSI can perform very differently if one runs 2.5 GPM and the other runs 4 GPM. Rule of thumb: 1,200 to 1,500 PSI with detergent for vinyl, soft wash for wood, 1,500 to 2,000 PSI for fiber cement, surface cleaner and 2,500 to 3,000 PSI for concrete.
Detergents, Surfactants, and Algaecides
A house wash detergent kit runs $25 to $60. For organic growth, you will also want a sodium hypochlorite blend (the same chemistry as common pool shock) at $20 to $40, applied through a downstream injector. Skipping the detergent is the single biggest reason DIY washes streak and re-green within months.
Surface Cleaner, Wands, and Tips
A 15-inch surface cleaner attachment ($120 to $200) makes driveway and patio work go five times faster and look uniform. An extension wand or telescoping lance ($75 to $200) keeps you off the ladder for second-story siding. A nozzle kit with 0, 15, 25, and 40-degree tips and a soft-wash tip is $20 to $40.
Safety Gear and Ladders
Closed-toe boots, safety glasses, gloves, and hearing protection are non-negotiable around a gas washer. If you do not already own an extension ladder rated for your height, add $150 to $350. Wet ladders on damp grass with a recoiling spray wand are the most common injury scenario in DIY power washing.
The all-in DIY math for a single Saturday usually comes in at $150 to $400 once you total rental, detergent, a tip kit, and incidentals. That covers the project, but it does not cover access risk on a two-story home or the cost of a streaked finish you have to live with for a year. If the access or the access-plus-add-on math has you on the fence, your local office can run the full envelope under a single labor scope, including the siding power washing pass that does most of the visible work.
Step-by-Step Process for DIY Power Washing
The sequence matters more than the pressure. Soak first, agitate with detergent, rinse from the top down, and you will get a uniform finish without etching the siding.
Prep the Exterior
Close every window. Tape over exterior outlets, light fixtures, and dryer vents. Move patio furniture, planters, and the grill at least eight feet from the wall. Pre-wet shrubs and grass within the spray zone so detergent does not concentrate on them. Cover delicate landscaping with light plastic, but uncover it before the rinse so the runoff dilutes.
Apply Detergent
Use a downstream injector or a low-pressure soap tip with a house wash detergent. Spray from the bottom up to avoid streaks. Let it dwell five to ten minutes. Do not let it dry. A second light application keeps the surfactants active in hot or sunny conditions.
Rinse from the Top Down
Switch to a wide tip (25 or 40 degrees) and rinse from the top down. Hold the wand at a slight downward angle so water sheds away from the laps, not behind them. Keep the tip 18 to 24 inches off the surface for vinyl and fiber cement; pull back to 36 inches for stucco and wood.
Spot-Treat Mildew and Algae
For stubborn organic growth, spot-treat with a sodium hypochlorite blend at roughly 1 percent concentration. Apply with a pump sprayer, dwell five to ten minutes, and rinse. Wear chemical-resistant gloves and eye protection. Avoid contact with painted trim and color-treated metal.
Final Rinse and Dry Time
Final rinse from the top down. Walk the perimeter, looking for streaks where detergent dried, and respray any visible bands. Let the house dry for a full day before painting, staining, or applying any sealant.
Application and Finishing Best Practices
The difference between a DIY job that looks pro and one that looks DIY is in the last hour of work, not the first.
Avoiding Streaks and Lap Marks
Streaks come from detergent drying on the surface and from inconsistent overlap on the rinse pass. Work in sections you can keep wet, rinse with overlapping passes the same way you would mow a lawn, and finish each wall before moving to the next so the dry time is consistent.
Protecting Landscaping, Outlets, and Windows
Plastic over outdoor outlets, tape over dryer and bath vents, and a soaked perimeter on planted beds. After the wash, give the landscaping a five-minute fresh-water rinse to dilute any residual detergent. Hose down decking, walkways, and pool surrounds before the runoff dries.
Choosing and Applying the Right Detergent and Finish
The chemistry you choose has more impact on the final look than the pressure setting on your machine. Cheap dish soap will not cut mildew. A surfactant-rich house wash will.
Detergent Selection
Match the detergent to the soiling. A general-purpose house wash with surfactants handles dust, pollen, and light atmospheric grime. Add a hypochlorite blend for green algae and black mildew. Add a degreaser for soffits near a grill or driveway oil. Read the dilution ratios; over-concentrated detergent damages plants and can dull painted finishes.
Application and Curing
Apply detergent with low pressure through a soap tip or downstream injector. Dwell five to ten minutes, keep the surface wet, and rinse before the detergent dries. Allow the entire envelope to air-dry for a full day before any paint or stain work. If you are pairing the wash with an exterior paint refresh, time the rinse so the wall has at least two clear, dry days before the first coat.
A Lighter Alternative: Soft Wash and Spot Cleaning
Sometimes the right answer is less pressure, not more. Soft washing and targeted spot cleaning solve a lot of the visible problems at a fraction of the equipment cost.
When Soft Wash Is the Only Safe Option
What is soft washing and when is it required? Soft washing uses low pressure (under 500 PSI at the nozzle) combined with surfactants and a hypochlorite blend to kill organic growth at the root. It is the required method for cedar shake, painted wood, EIFS synthetic stucco, asphalt shingle roofs, and any surface where pressure would do more harm than good. Soft wash quotes typically run 10 to 20 percent more than a comparable power wash because the chemistry does the work and the dwell time is longer.
Garden-Hose-and-Brush for Spot Cleaning
For a single grimy spot under a downspout or a streak below a window box, a soft brush on an extension pole, a bucket of house wash mix, and a garden-hose rinse will do the job for under $30 in supplies. This is a Saturday morning project, not a full-day commitment.
Special Considerations That Change the Price
Five upcharges show up on most two-story quotes. Knowing them in advance lets you decide which ones are worth bundling.
Two-Story and Hard-to-Reach Access
Second-story access is the single largest surcharge after square footage. Crews either run a longer wand from the ground or set ladders, and either way the work slows down. Expect a 30 to 50 percent premium over a comparable single-story quote.
Gutter Cleaning Add-On
Most crews offer interior gutter cleaning for $75 to $200 as an add-on. Exterior gutter brightening (removing the black drip stripes) is a separate $100 to $300 line item that uses an oxalic-acid-based gutter cleaner.
Window Cleaning Add-On
Exterior-only window wash add-on usually runs $4 to $10 per window. Worth bundling if the crew is already on site with ladders.
Roof Soft Wash
If your roof has black streaks (gloeocapsa magma algae), a roof soft wash runs $250 to $700 depending on pitch and complexity. It is a soft wash only; no crew should put pressure on asphalt shingles.
Mildew, Mold, and Algae Treatments
A dedicated biocide pass typically costs $50 to $150 over the base wash. Worth paying for if the shaded sides of your house are noticeably green or black.
Regional Cost Differences
Coastal and humid climates run higher because the work cycles faster. The Pacific Northwest, the Southeast, and the Gulf Coast typically price 15 to 30 percent over the national average. Arid regions like the desert Southwest often price 10 to 20 percent under.
If two or more of those add-ons apply to your home, a bundled service appointment usually beats a piecemeal DIY weekend. Your local office can scope the envelope start to finish, including the gutter, window, and trim work that drives most of the quote variance.
Maintenance and Long-Term Care
A wash is only worth as much as the maintenance plan behind it. The right schedule extends the visible result by years.
How Often to Power Wash
How often should you power wash your house? A full exterior wash every 1 to 2 years is enough for most homes, with annual washes recommended in humid climates or under heavy tree cover. Brick and fiber cement can stretch to every 2 to 3 years; wood and stucco often need yearly attention on shaded sides.
Yearly Soft Wash vs. Periodic Deep Wash
A common pro maintenance plan pairs a yearly soft wash (kills the organics, keeps the envelope clean) with a deep wash every 3 to 5 years (full surfactant treatment plus surface cleaner work on hardscape). Total annual cost stays similar to one big wash every other year, and the house never looks dirty in between.
Things to Consider Before You Start
Five gut-check questions before you book the work or rent the rig.
- Is anyone on the project crew (you or the contractor) carrying insurance that covers damage to your siding and your neighbors' property?
- Where is the water source, and does your spigot deliver the 4 to 5 GPM the machine actually needs to perform?
- Does your HOA restrict detergents or runoff into the storm system?
- How fragile is your landscaping, and are any annuals about to bloom on the spray side of the house?
- If you are going DIY, do you have an honest Saturday plus Sunday morning buffer if the weather flips?
Why Homeowners Bring in Ace Handyman Services
A power wash looks like one of the simplest projects on a homeowner's list, right up until you are on a ladder with a recoiling wand, looking at a streak you cannot quite reach. Our craftsmen handle the work that makes the visible difference and the work that protects the envelope while the wash is happening.
- Peace of mind on a project where the wrong tip can damage siding, mortar, or stucco in seconds.
- One-year labor warranty on the work we perform.
- No equipment to source, no rental yard run, no nozzle kit to learn on your own house.
- Background-checked W-2 craftsmen rather than rotating subcontractors.
- Predictable weekday scheduling that does not eat your weekend.
- Right-sized scope that pairs the wash with the trim caulking, gutter work, or paint prep that usually comes next.
- Cleanup and site protection included, from outlet covering to landscaping rinse.
If you would rather skip the rental yard and the Saturday, reach out to your local Ace Handyman Services office to walk the project, lock in a timeline, and get the exterior crisp before paint season or the next family gathering.
Frequently Asked Questions
How long does it take to power wash a house?
A professional crew typically finishes a single-story home in 2 to 3 hours and a two-story home in 4 to 6 hours, including detergent dwell time and final rinse. DIY usually doubles those estimates once you factor in setup, ladder moves, and learning curve.
Is it cheaper to power wash a house yourself?
Renting a residential power washer costs roughly $75 to $150 per day plus detergent, so DIY usually saves $100 to $300 compared to a pro if you already own ladders, safety gear, and a full Saturday. Two-story homes erase most of that savings once ladder time and risk are factored in.
What is the difference between power washing and pressure washing?
Power washing uses heated water and high pressure, while pressure washing uses unheated water at high pressure. Soft washing uses lower pressure and chemical surfactants and is the safe choice for most residential siding, especially wood, EIFS stucco, and painted finishes.
Can power washing damage siding?
Yes. Too much pressure, the wrong tip, or holding the wand too close can crack vinyl, etch wood, blow out mortar joints, and strip paint. Pairing a wide tip with surfactants and the right standoff distance is what keeps the work safe.
Does power washing include the roof?
Standard house wash quotes rarely include the roof. A roof soft wash is a separate $250 to $700 line item and is required on asphalt shingles since high pressure will lift granules and shorten roof life.
How much extra does it cost to power wash a two-story house?
Plan on a 30 to 50 percent surcharge over a comparable single-story quote. The driver is access time and equipment, not the extra square footage, since crews need longer wands, taller ladders, and slower, more careful passes.