How Much Does Power Washing a House Exterior Cost
You're standing in the driveway looking up at the north side of the house. The vinyl has a green cast that wasn't there last spring. A dark drip runs down from the gutter joint above the front door. Behind the chimney, on the second story, a stain you can't quite reach with a hose. Three companies came out and gave you three numbers — $189, $475, and $920.
Same house. Same week. Three quotes that don't line up. Here's what the math actually looks like.
A fair house-wash quote in 2026 lands between $250 and $900
For a typical single-family home — one to two stories, vinyl or brick siding, average dirt and algae load, no unusual access challenges — a fair house wash falls in the $250 to $900 range. A one-story ranch on a flat lot with light staining sits at the low end, $250 to $450. A two-story colonial with heavy algae on the shaded elevation pushes toward $750 to $900. A three-story home, or one with extensive stucco, EIFS, or stone, can fairly run $900 to $1,500.
Quotes outside that range usually mean one of two things. Either the low number isn't a real house wash — it's a fast pressure rinse that strips the visible green and leaves everything underneath alive — or the high number is padding access costs beyond what the job needs.
Here's how the numbers shake out by home size:
| Home size (heated living area) | Single-story, average load | Two-story, average load |
|---|---|---|
| Under 1,500 sq ft | $200 – $400 | $300 – $550 |
| 1,500 – 2,000 sq ft | $275 – $500 | $400 – $750 |
| 2,000 – 2,800 sq ft | $375 – $650 | $550 – $900 |
| 2,800 – 3,500 sq ft | $475 – $800 | $700 – $1,200 |
| 3,500+ sq ft | $625 – $1,000 | $900 – $1,500+ |
Living area is a proxy. The actual measurement that matters is wall surface area — perimeter times wall height — because that's how much siding the crew has to wash.
What actually moves the number on a quote
A handful of conditions push the price up or down. A trained crew walks the property, identifies which ones apply, and prices accordingly.
| Cost driver | Typical add to the quote | Why it costs more |
|---|---|---|
| Square footage of siding | $0.15 – $0.45 per sq ft | More surface, more chemistry, more rinse time |
| Two-story or three-story access | $75 – $300 | Extension wands, ladders, sometimes a small lift |
| Heavy algae or mildew load | $50 – $150 | Stronger mix, longer dwell, sometimes a second pass |
| Stucco or EIFS cladding | $100 – $275 | Slower work to keep water from getting behind the finish |
| Brick or partial-brick | $50 – $125 | Brick holds biocide longer and needs a careful rinse |
| Soffit, fascia, and trim included | $50 – $125 | Overhead work in tight angles |
| Exterior gutter face (tiger stripes) | $75 – $200 | Different chemistry, hand-brushed on every linear foot |
| Heavy landscaping at the foundation | $40 – $90 | Pre-soak and post-rinse on plants takes real time |
| Long hose runs (over 150 ft to back of house) | $25 – $75 | Equipment carry, more pressure loss |
| Steep grade or limited driveway access | $50 – $200 | Equipment hauled in by hand |
These are 2026 dollars. A fair quote reflects the conditions that actually apply at your property. If three estimates all ignore the dormers, the EIFS, or the wooded back elevation, only one is doing the real measurement. The other two are guessing.
Why "house washing" actually means three different products
The word "power washing" gets used loosely. In practice, three different methods get sold under the same name, and the price gap between them is real because the work is real.
A high-pressure rinse blasts the siding with 2,500 to 3,000 PSI of plain water, sometimes with detergent injected downstream. It knocks the visible film off vinyl. It does nothing to the algae living in the textured grain of the panels or the pores of brick. Six to ten weeks later, the staining is back. This is the $150 to $250 quote.
A soft wash applies a sodium-hypochlorite-based biocide at low pressure, lets it dwell ten to fifteen minutes, and rinses with low-pressure water. The chemistry kills the algae at the cellular level. The siding stays clean for two to four years instead of two to three months. This is what most reputable crews mean by a real "house wash" — $350 to $900 depending on size and access.
A traditional high-pressure wash with detergent splits the difference. It works fine on concrete and brick patios. It is the wrong tool for vinyl, EIFS, stucco, painted siding, and most wood, because high pressure forces water into the seams behind the cladding — where mold growth begins.
Why two-story houses are their own pricing tier
A one-story ranch with the same siding area as a two-story colonial costs noticeably less. The wall area is similar. The work is not. A two-story job means gable ends, dormers, high soffits, and trim above the second-floor windows — extension wands, longer hose runs, a ladder moved six or eight times, sometimes a small towable lift.
A second story also changes how the chemistry behaves. Biocide running down from twenty feet up dwells longer on the way to the ground than biocide sprayed from six. A trained crew works top-down with a pre-soaked lower wall so the lower panels don't streak as diluted solution rolls past. A rushed crew works bottom-up and leaves watermarks a week later when the siding dries.
What cheap quotes usually leave out
A $189 quote on a two-story isn't a discount. It's a different product. Here's what typically isn't in the scope:
The chemistry. The cheap crew pulls up with a pressure washer, injects a little detergent, and blasts the siding. No biocide. No dwell. The algae cells stay alive in the textured surface and start regrowing as soon as the panels dry.
The dwell time. A real house wash applies biocide and lets it sit ten to fifteen minutes before rinsing. That's the part that kills the organism. A rushed crew sprays and rinses inside three minutes because they have a second job by lunch.
The high work. Second-story gable ends, dormers, and trim above the upper windows usually aren't on the scope. The crew cleans what they can reach from a six-foot ladder. Two weeks later the high streaks are visible from the street.
The landscaping protection. The biocide is an oxidizer that burns azaleas, boxwoods, hostas, and most groundcover if it lands undiluted. A trained crew pre-soaks the beds, dilutes runoff, and floods the soil at the end. The cheap quote skips that step. Two weeks later the shrubs along the foundation start dropping leaves.
DIY versus hiring a crew: what the math actually says
A pressure washer rents for $75 to $125 a day. A pump sprayer adds $25. A jug of pool chlorine runs $20. On paper, the DIY cost is $120 to $170 against a $400 quote.
The math falls apart at application. Household-grade pool chlorine has no surfactant chemistry to cling to vertical siding — it runs off in twenty seconds, and the dwell that kills the algae below the surface never happens. The DIY wash either does nothing visible or, if the homeowner pushes the concentration, burns the trim and kills the landscaping. Then there's the ladder time. Falls from second-story height are a leading source of homeowner-injury claims after roof work. DIY works on a single-story where every panel is reachable from the ground. It does not work on a two-story.
What to bundle on the same visit
The crew is already there. Setup is paid for. Adding work the same day costs less than booking it a month later. Typical add-on ranges in 2026:
| Add-on (booked with the house wash) | Typical range | Notes |
|---|---|---|
| Driveway and walkway concrete | $125 – $300 | Surface cleaner pass, oil-stain treatment if needed |
| Roof soft wash | $400 – $900 | Separate chemistry, slower work, steep pitches add cost |
| Gutter exterior (tiger-stripe treatment) | $75 – $200 | Linear-foot pricing, hand-brushed |
| Gutter interior debris cleanout | $125 – $275 | Ladder access, separate from exterior face |
| Deck or fence wash | $150 – $400 | Wood needs gentler chemistry and a stripping pass if pre-stain |
| Patio or pool deck | $150 – $400 | Concrete cleaner attachment, multiple surface profile passes |
| Exterior windows | $100 – $250 | Soft-wash residue rinse, sometimes thrown in |
Bundling two or three usually saves ten to twenty percent versus standalone visits. Most crew time is setup, walk-through, and plant protection — none of which scale with the number of services.
How to read a quote and tell whether it's fair
A fair house-wash quote has line items. Look for the wall surface area or perimeter, the crew measured. Look for what's included — siding, soffits, fascia, gutter exterior, trim, and exterior windows are separate scope items. Look for the chemistry. A quote that says "house wash" without naming sodium hypochlorite or a biocide concentration is sometimes a pressure rinse in disguise.
A reputable estimate also names the application method: top-down work, pre-soaked landscaping, dwell time before rinse, low-pressure rinse on cladding that can't take high pressure. If a quote mentions none of this and gives a flat number, ask. Two more checks — is the price firm or a range, and does the quote address plant protection? A firm number after a walk-through means the crew knows what's in front of them. A range with no walk-through usually means a fast 90-minute job that holds only if nothing complicated turns up.
When a wash is the prep step, not the finished job
Some house washes aren't the finished work — they're the setup for an exterior repaint. Paint sticks to clean substrate. It does not stick to chalky film, algae cells living in the texture of siding, or pollen and pollution residue. Skip the prep wash and the new paint film fails in two to three years instead of eight to ten. A prep wash bundled with a repaint usually adds $300 to $700 — less than a standalone wash because the setup is shared.
FAQs
A two-person crew typically spends three to five hours on a single-family house — walk-through, pre-soak, biocide application, dwell time, and final rinse. A 1,500-square-foot ranch can finish in two hours. A 3,000-square-foot two-story with heavy algae can take a full day. A 90-minute door-to-door job is either skipping a step or running a pressure rinse.
For most single-family homes, every two to four years is a reasonable cadence. Houses on shaded lots come back faster — sometimes 18 to 30 months. South-facing sun-exposed elevations can hold five years or more. The right interval is when the staining becomes visible from the curb, not a fixed calendar date.
Yes. Paint over chalky residue, algae spores, or pollen film loses adhesion in two to three years. A wash done the same week as the repaint costs less than a standalone job because the setup is shared. Expect $300 to $700 added to a typical exterior paint quote.
Yes, down to about 40 degrees Fahrenheit. Below that the biocide slows enough that dwell time has to double and the kill rate drops. Most crews in colder regions book house washes from late March through mid-November. In milder climates, year-round work is normal.
Not at the correct concentration. The biocide is mixed to the surface — vinyl gets a stronger mix than painted brick, painted brick a stronger mix than aged stained trim. Landscaping is protected by pre-soaking the beds and rinsing the soil afterward. Most damage stories come from DIY jobs or from crews that skip the pre-soak.
Probably not. A quote half what the next bidder gave is almost never the same product. The cheap crew is selling a pressure rinse with detergent. The result might look fine for a few weeks, but the algae and biofilm under the surface are still alive and the staining returns within a season. Cheap up front becomes a second wash six months later.
The wash that holds is the one that explains what it's doing
Three quotes from $189 to $920 don't represent three prices for the same job. They represent three different products. The $189 product is a pressure rinse that leaves the organism alive. The $920 product is sometimes fair for heavy access and sometimes padding. The middle quote, after a crew has walked the property and named chemistry, dwell, and application method, is usually the one that holds.
The right question for the crew isn't "what's the price." It's "what's the application." If the answer names sodium hypochlorite concentration, dwell time, low-pressure rinse, top-down work, and plant protection, you're talking to someone who's done this several hundred times. If the answer is "we'll get it clean for you," keep dialing. The cheap wash usually comes back as the next quote in 90 days.
