If you have a 20x20 deck in Myrtle Beach, the short answer is that professional power washing usually falls somewhere between $200 and $450, with many homeowners landing in the $250 to $350 range for a straightforward job.
That range is wide for a reason. A deck is never just a deck on paper. In real life, one homeowner has a lightly soiled pressure treated pine platform with wide-open access, and another has a salt-air-beaten composite deck wrapped around a pool, packed with furniture, railings, mildew, and years of sunscreen residue. Same square footage, very different job.
A 20x20 deck is 400 square feet, which gives you a useful baseline when you start asking, how much does it cost to power wash a 20x20 deck? In Myrtle Beach, labor rates, travel time, seasonal demand, and coastal grime all push pricing around more than many people expect.
Why Myrtle Beach deck cleaning costs are a little different
Coastal South Carolina is hard on outdoor surfaces. Salt in the air, steady humidity, pollen in spring, summer storms, and shade from live oaks or neighboring homes all help mildew and algae settle in fast. On inland properties, a deck may just look dusty after a season. Near the beach, it often develops that dark film that makes boards look older than they are and gets slick after rain.
That matters because a contractor is not simply spraying water. A good one is choosing pressure, detergent, dwell time, rinse pattern, and surface speed carefully enough to clean the deck without leaving wand marks or gouging soft wood. In Myrtle Beach, a lot of decks also need a mildewcide or house wash mix to break down organic growth before the rinse even starts.
So when people ask, what is a reasonable price for pressure washing, the answer depends heavily on what has built up on the surface and how much care the material requires.
A realistic price range for a 20x20 deck
For a plain 400 square foot deck with average soil, basic access, and no staining or sealing included, these are common ballpark figures:
| Deck condition | Typical price range | |---|---:| | Light cleaning, easy access | $200 to $275 | | Average soil, standard wood or composite | $250 to $350 | | Heavy mildew, railings, stairs, detailed work | $350 to $450+ |
That table reflects what many homeowners actually run into when calling around, not a hard rate card that every company follows. Some Pressure Washing Near Me cleaners price strictly by square foot, often around $0.50 to $1.00+ per square foot for decks, while others have a minimum service charge and then add for complexity.
A 20x20 deck may be 400 square feet, but if it includes a full railing system, built-in benches, steps, lattice skirting, or tight landscaping around the perimeter, the square footage alone stops telling the whole story.
What drives the quote up or down
Most pricing decisions come down to a few practical things:
- the deck material, such as soft wood, hardwood, or composite the amount of algae, mildew, gray weathering, and embedded dirt how much detail work is involved with railings, stairs, and furniture moving whether the contractor is cleaning only, or also prepping for staining or sealing access to water, hose routing, and how easy it is to work safely around the deck
Wood decks usually require more care than people think. Too much pressure can raise the grain, fur the surface, or leave obvious lap marks. Composite decks can also be damaged if the nozzle is too close or the pressure is too aggressive. A lower-pressure chemical-assisted wash is often the smarter approach.
I have seen homeowners focus only on the lowest quote, then wonder why their deck feels rough under bare feet afterward. That often comes from someone trying to clean too fast with too much pressure. The cheapest job can turn into sanding, repairs, or an early refinish.
Power washing vs pressure washing, and why the wording confuses people
A lot of customers ask, what is the difference between power washing and pressure washing? In casual conversation, most contractors use the terms interchangeably. Technically, power washing uses heated water, while pressure washing uses unheated high-pressure water.
For decks, heated water is not usually the key issue. The bigger difference is whether the cleaner relies mostly on brute force or uses the right soap, the right pressure, and the right technique. On wood and composite decking, skilled pressure control matters far more than whether the machine technically heats the water.
If you call three companies in Myrtle Beach, one may advertise power washing, one may say pressure washing, and another may say soft washing for delicate surfaces. Ask what process they plan to use on your specific deck material. That will tell you much more than the label.
How pros actually price out pressure washing
Homeowners often ask, how do you price out pressure washing? The answer is usually some blend of square footage, time, risk, and setup.
A contractor may start with the deck size, 400 square feet in this case, then adjust for railings, stairs, heavy biological growth, or prep needs before staining. Travel and minimum job size also matter. A small standalone deck cleaning may cost more per square foot than a large project because the company still has to load equipment, drive out, hook up, protect nearby areas, and clean up.
That is why the answer to how much does pressure washing cost Myrtle Beach is never one neat number. A local company with insurance, proper equipment, and experienced techs has overhead. Another operator working from a pickup with a homeowner-grade machine might quote much less. Those are not the same service, even if the words on the estimate look similar.
If you want to compare by square footage
A 20x20 deck gives us one useful way to compare with other common pressure washing questions.
A 20x20 deck equals 400 square feet. If a company charges $0.75 per square foot, the cleaning would be about $300. At $0.60 per square foot, it would be $240. At $1.00 per square foot, it would be $400.
That same logic helps when people ask, how much does it cost to pressure wash 1000 square feet of driveway? A 1,000 square foot driveway often runs roughly $150 to $350, depending on stain level, access, and whether oil treatment is needed. Driveways are usually faster than decks because they are flat, open, and can tolerate stronger surface cleaning.
And when someone asks, how much do people charge for a power wash clean driveway, the answer is often lower per square foot than deck cleaning for exactly that reason. A deck has edges, corners, railings, softer material, and more opportunity to do damage if rushed.
The hidden cost of a deck that is overdue
If your deck has gone two or three seasons without cleaning, the quote may jump because the work changes. A lightly dirty deck is a maintenance wash. A blackened, slippery deck may need pretreatment, brushing in trouble spots, extra rinse passes, and more time for detail work around fasteners and rail posts.
That extra labor is easy to underestimate from the ground. I have walked onto decks that looked only a little dull from a distance, then found mildew packed into the grain and green buildup tucked under railing shadows. Those jobs rarely price like a simple rinse.
If the deck is also being prepped for stain or seal, the cleaner may have to remove old failing product, brighten the wood, or at least leave the surface evenly cleaned so the next coating absorbs properly. That can move a simple wash into restoration territory.
Is DIY worth it for a 20x20 deck?
Sometimes yes, sometimes absolutely not.
If you already own a decent washer, understand nozzle selection, and know how to keep pressure low on wood, you might save money. But if you are shopping equipment just for one job, the math changes fast. People often ask, how much should I pay for a pressure washer? For occasional homeowner use, a basic electric unit may cost around $150 to $300, while a stronger gas unit can run $300 to $700 or more. Add hoses, cleaners, surface-safe tips, and your time, and DIY savings can shrink.
The bigger risk is damage. A driveway can forgive a lot. A wood deck does not. A concentrated spray can etch lines into boards almost instantly. Too much pressure around aging fasteners can worsen splintering. Composite can stripe or scar if handled carelessly.
For that reason, many people who would happily clean a patio or driveway themselves still hire out deck washing.
How long should the job take?
A typical 20x20 deck cleaning usually takes 1.5 to 4 hours on site, depending on setup, condition, detail work, and whether drying time between treatment steps matters. A basic open deck can move quickly. A deck with railings on all sides, stairs, built-ins, or years of mildew takes longer.
Time questions come up a lot across different surfaces. For example, how many hours does it take to pressure wash a driveway? A standard residential driveway may take 1 to 3 hours depending on size and soil level. How long does it take to pressure wash a 2000 sq ft house? That often falls around 2 to 6 hours, though a multi-story home, heavy oxidation, or lots of delicate trim can stretch the day.
Those comparisons matter because they explain why a 400 square foot deck may cost more per foot than a much larger driveway or house wall section. The deck often requires slower, more careful work.
What about PSI, and is more always better?
This is where a lot of homeowners get tripped up. They see a machine with a higher PSI rating and assume it will clean better.
That is not how good washing works.
People ask, is 2000 PSI enough to clean a driveway? For many light to moderately dirty driveways, yes, especially with the right nozzle and a surface cleaner. It may just take longer than a commercial setup. They also ask, is 3000 PSI too much to wash a car? Yes, for most situations that is too aggressive if used carelessly. Cars require very gentle technique and appropriate distance.
For decks, the right PSI depends on the material, the nozzle, and the operator’s skill. Many wood decks are cleaned effectively at much lower working pressure than homeowners expect, sometimes just a few hundred to around 1,200 PSI at the surface, combined with proper detergents. The machine itself may be capable of more, but the output the deck actually receives should be controlled.
A strong machine in careful hands is fine. A strong machine in impatient hands is expensive.
Best time of year to power wash in Myrtle Beach
If you are wondering, what is the best time of year to power wash, Myrtle Beach gives you a longer cleaning season than colder climates. Spring and fall are usually ideal.
Spring works well because pollen, winter grime, and early mildew start showing up fast. It is also a smart time to clean before peak outdoor entertaining season. Fall is another good window, especially after the heavy humidity and summer growth have done their thing.
Summer cleaning is common too, but schedules fill up, surfaces dry quickly in the heat, and afternoon storms can complicate timing. Winter is still possible in coastal South Carolina, just less predictable.
For decks, I usually think less in terms of a single perfect season and more in terms of use and exposure. If your deck sits under trees and stays damp, it may need attention sooner than a sunny open deck. If you plan to stain or seal, coordinate washing far enough ahead for the wood to dry properly.
Is power washing a driveway worth it, and what that says about deck cleaning
People ask, is powerwashing a driveway worth it? Most of the time, yes. It improves curb appeal, reduces slippery growth, and can help concrete last better by removing organic buildup and grime.
Deck cleaning is even easier to justify because decks are living surfaces in a way driveways are not. You walk on them barefoot. Kids sit on them. Guests notice them up close. Organic growth on a deck is not just ugly, it can be slick and uncomfortable. If neglected long enough, dirt and mildew can shorten the life of wood finishes and make the deck look tired before its time.
A clean deck also gives you a more honest read on condition. Once the grime is gone, you can actually see whether boards are sound, whether a finish is failing, and whether a few repairs are needed before the problem spreads.
What to ask before hiring someone
A low quote means very little if the cleaner plans to blast the surface and leave. Before you hire a company, get clear on process, not just price.
- ask whether they have experience with your deck material ask if they use chemicals and low-pressure methods where appropriate ask whether moving furniture, cleaning railings, and stairs are included ask if the quote covers prep for staining, if that is your goal ask whether they are insured for exterior cleaning work
You do not need a long interrogation. A short conversation usually tells you whether the contractor understands decks or mostly cleans concrete and wants to treat everything the same way.
How deck cleaning compares with house washing and driveway cleaning
Many homeowners bundle services, which can lower the total cost. If a company is already on site washing a house or driveway, adding the deck may be cheaper than booking it alone because setup and travel are already covered.
For context, how much does it cost to pressure wash a 1500 square foot house? In many markets, that may run roughly $250 to $500, depending on the siding, height, access, and level of buildup. House washing is often done with soft washing methods, not high pressure, especially on vinyl, painted surfaces, and trim.
A bundle might look something like this in real life: a 1,500 square foot home wash for $325, driveway cleaning for $175, and deck cleaning for $250 added at the same visit. Separately, those numbers might total more. Together, the homeowner saves a bit, and the contractor keeps the truck productive for a full job block.
That is one reason it can help to residential pressure washing Myrtle Beach ask for package pricing if you have several surfaces looking tired at once.
A few Myrtle Beach-specific situations that affect deck quotes
Local conditions matter more than people think. In Myrtle Beach and nearby areas like Surfside Beach, North Myrtle Beach, Carolina Forest, and Murrells Inlet, I would expect a quote to rise when any of these are present:
Homes very close to the ocean tend to collect more salt residue and weather harder. Shaded properties near marshy or damp areas often have more organic growth. Rental properties can have heavier wear and more ground-in grime from constant use. Decks around pools often pick up sunscreen, drink spills, and moisture-related buildup that needs more than a quick rinse.
Then there is simple access. A deck behind a locked gate, with long hose pulls and delicate landscaping all around it, takes longer to work than one right off the driveway with room to maneuver.
A sensible budget for most homeowners
If you just want a usable number to plan around, budget about $300 for a standard professional cleaning of a 20x20 deck in Myrtle Beach, then give yourself room up to $400 or a bit more if the deck has railings, stairs, significant mildew, or prep needs before staining.
That is a realistic middle ground. It is not the cheapest number you may hear, and it is not the highest. It is the kind of range where qualified contractors often land when they are pricing the work carefully.
If someone quotes far below that, ask how they plan to clean it and what is included. If someone quotes well above it, ask what conditions they are accounting for. Sometimes the higher quote is padding. Other times it reflects a deck that genuinely needs more labor.
The best price is not the lowest one. It is the one that gets the deck clean, avoids damage, and leaves you with boards that look better instead of rougher.
For a 20x20 deck in Myrtle Beach, that usually means hiring someone who understands coastal buildup, uses the right method for the material, and prices the job based on more than square footage alone.