Pressure Washing in Los Angeles

Pressure washing is the use of pressurized water — sometimes combined with cleaning detergents and soft-wash solutions — to remove dirt, oil stains, gum, mildew, algae, pollen, soot, bird droppings, and accumulated grime from exterior surfaces around a home. The work spans driveways and concrete walkways, vinyl and stucco siding, wood decks and fences, patios and pool decks, brick walls, and even roofs when handled by experienced pros. Despite the name, pressure washing is rarely about pressure alone. The right approach matches a specific PSI range to each surface, pairs water with the correct detergent for the contamination type, and adjusts the spray angle and tip distance so that hard surfaces get clean while delicate surfaces stay intact. A driveway with embedded oil stains might need 3000-plus PSI and a degreaser to lift the contamination, while a wood deck right next to it should never see anything above 1500 PSI without splintering or etching the grain.

Los Angeles creates an unusual amount of work for pressure washing pros because the climate and geography conspire to coat outdoor surfaces in stuff that doesn't wash off in the rain — because there isn't much rain. The Mediterranean climate runs eight to nine dry months a year, so dust accumulates on driveways and house siding without ever getting rinsed naturally. Valley neighborhoods like Sherman Oaks, Encino, Tarzana, and Northridge sit in a dust bowl during summer, and a clean driveway turns gray-brown within a month from airborne particulate. Wildfire seasons — increasingly long and intense — leave a fine ash layer on driveways, roofs, siding, and patio furniture across nearly all of LA County, and that ash bonds with morning dew into a gray film that doesn't sweep away. Year-round pollen settles on horizontal surfaces in mid-Wilshire, Pasadena, San Marino, and the foothill communities, leaving yellow-green stains on white concrete and pool decks. Birds in palms and ficus trees drop on driveways and walkways, and dried droppings etch into concrete if not removed within a few weeks. Westside homes near the coast — Santa Monica, Venice, Pacific Palisades, Mar Vista — get a salt residue on stucco and metal that quietly eats finishes if it stays put for years.

A complete pressure washing job is more diagnosis than blasting. A pro walks the property, identifies which contaminations are present on which surfaces, picks the appropriate PSI and tip combination for each, applies the right detergent or soft-wash solution where the contamination needs chemistry not just pressure, and protects vulnerable areas — windows, light fixtures, paint, plants, irrigation electronics — before any trigger gets pulled. The actual washing is the easy part once the diagnosis is right. The hard part is knowing when not to use high pressure: on wood, on roofs, on stucco with hairline cracks, on painted surfaces, and around any electrical box or vent. A vetted pro will spend the first ten minutes walking the property and explaining the plan before the wand comes out of the truck.

Your driveway has gone from a clean medium gray to a streaky tan-brown that doesn't come back even after sweeping. This is the LA standard — eight months of dust accumulation, mixed with tire-tracked oil, the occasional bird dropping, and pollen settling each spring. A driveway-only wash with a degreaser pre-treatment for any oil spots runs $140-240 for a small to medium drive (one to two-car wide, 30-50 feet long) and takes 60-90 minutes. The transformation is dramatic — most homeowners are surprised the original concrete color was that light. If your driveway also has gum, paint drips, or rust stains, mention these when getting a quote so the pro brings the right specialty cleaner.

After a wildfire season, your driveway, roof, and siding are coated in fine gray ash that doesn't rinse off with the garden hose. Wildfire ash is fine, alkaline, and bonds chemically with surfaces over time, especially on roofs and siding where it sits for weeks. Ash on a driveway will turn into permanent staining if it goes through one wet-dry cycle without being removed. After the major fire seasons that have hit LA repeatedly in recent years, pros book out for weeks doing whole-property ash removal — a driveway plus siding plus walkway combo runs $380-680 in this scenario, and most pros will recommend it as a single visit rather than scheduling separate cleanings months apart.

Your house is being painted, listed for sale, or photographed for a real estate listing. Pre-listing curb appeal is one of the highest-ROI uses of pressure washing in LA real estate. A faded driveway, a dusty stucco facade, and a pollen-coated walkway read as deferred maintenance to buyers, and they get priced into the offer. A whole-property wash before listing runs $580-980 — pros usually do driveway, walkway, siding, and patio in one visit — and it shows up immediately in listing photos, open house impressions, and offer prices. Pre-paint cleaning is a separate, more specific job: paint adheres poorly to dusty or chalky siding, and most professional painters require the surface be cleaned within 7-14 days before paint goes on. Pre-paint prep washes are $280-480 depending on house size.

Your wood deck looks gray, dirty, and dingy — but it's structurally fine and just needs to come back to life. Decks accumulate algae and mildew in shaded sections, pollen and dust in open sections, and BBQ-related grease near the cooking area. A proper deck wash uses low pressure (under 1500 PSI) or a soft-wash chemical clean rather than mechanical pressure, because high-PSI water on softwood lifts the grain, splinters the surface, and ruins the look you're trying to restore. Done correctly with a deck cleaner like Krud Kutter or a bleach-based mildew solution, a wood deck wash brings the wood back to a clean tan and prepares the surface for stain or sealer reapplication. Deck-only washes run $180-380 depending on size and condition.

Your roof has dark streaks, green patches of algae, or moss starting in the shaded sections. This is a real LA problem, especially on north-facing roofs in shaded canyons (Laurel, Coldwater, Beachwood) and on properties with overhanging trees. The streaks are gloeocapsa magma, an algae that feeds on the limestone in asphalt shingles, and it spreads. The fix is a soft wash — a low-pressure application of a sodium hypochlorite (bleach) solution that kills the algae and lets rain rinse the residue over the following weeks. Never let anyone use high-pressure water on a roof: it strips granules off shingles, voids the warranty, drives water under the shingles, and creates a fall hazard. Soft-wash roof cleaning runs $380-680 for a typical single-story or moderate two-story roof in LA, and the result lasts 3-5 years before needing reapplication.

Verify what's been verified. Every Shatun Brothers pressure washing pro verifies their identity through Persona ID + selfie liveness before they list: government-issued ID through Persona, current general liability insurance certificate, and California state license where the job exceeds the $500 CSLB handyman scope. Most residential washing — driveways, walkways, single-story siding, decks — falls under the exemption, but multi-property commercial work, two-story-plus exterior cleaning that requires lift equipment, and roof soft-wash work above certain thresholds can push above the exemption. We route only to pros holding the appropriate credentials for each job tier.

Confirm the pro understands surface-specific PSI rather than treating every job the same. The fastest way to spot an inexperienced pressure washer is asking how they'd approach a wood deck. The right answer involves low pressure (under 1500 PSI), wider tip angle (40-degree or soap tip), longer wand distance, and a deck-specific cleaner — not just dialing the trigger back on a 3000 PSI machine. A pro who says 'we use the same setup for everything' is the pro who will leave wand marks on your stucco and splinter your deck. A good pro will rattle off PSI ranges by surface without hesitation: 3000-plus for concrete, 1500-2500 for vinyl siding, under 1500 for wood, soft-wash chemistry only for roofs, medium with a deck cleaner for patios and pool decks.

Ask which detergents and cleaners they bring. Water alone — even at 4000 PSI — does not remove embedded oil from concrete, kill algae on a roof, or break down mildew in shaded siding. The chemistry does the cleaning; the pressure rinses it off. A professional setup includes a degreaser for oil and gum (Krud Kutter, Simple Green Pro Heavy Duty), a sodium hypochlorite mix for algae and mildew on roofs and siding (Wet & Forget for longer-term prevention), a deck cleaner with brighteners for wood, and a neutralizing rinse for any chemical work. If the pro shows up with just a pressure washer and a hose, you're getting a mechanical surface rinse, not a clean.

Look at the equipment, not just the price. Consumer-grade pressure washers (Karcher K-series, Ryobi 1900-PSI electric) have their place — they handle small driveways and patio furniture fine — but a pro doing a whole-property wash should be running professional-grade equipment: Simpson, DeWalt, or commercial gas-powered units rated for 3500-4400 PSI with adjustable flow, a downstream chemical injector for soft-wash detergent application, surface cleaners (the round disc attachment that washes a flat 12-20 inch swath at uniform pressure — essential for clean driveways without wand marks), telescoping wands for two-story siding, and proper PPE. A pro showing up with the same Ryobi you can rent at Home Depot for $50 a day should not be charging professional rates.

Read the recent reviews, not the lifetime average. A pro with 60 reviews averaging 4.9 stars but recent reviews mentioning wand marks on stucco, dead plants near the foundation, or streaky finishes on concrete is heading the wrong way. We show the last 10 reviews on every pro profile so you see the trajectory, not just the score. Pay attention to whether reviewers mention the result holding up — a clean driveway should still look clean three to four months after the wash, not turn streaky in three weeks because the original cleaning was uneven.

Get the scope in writing before the work starts: which surfaces are included, what kind of pre-treatment, whether windows and doors will be wiped down after overspray, plant protection (saturating beds with fresh water before any chemistry hits, covering sensitive plants), water source (yours or theirs — most pros use yours), and whether the price includes a soft wash or just pressure. A $280 driveway-only quote is not the same job as a $580 whole-property wash, and homeowners frequently get surprised when 'pressure washing' turns out to be just the concrete and not the siding they assumed was included.

Pressure washing has the widest DIY-versus-pro spectrum of any home service, because the surfaces vary so much in difficulty and risk. A small driveway with no major staining is the easiest entry point: rent a Ryobi 1900-PSI electric or a 2300-PSI gas unit from Home Depot for $50-80 per day, buy a degreaser for $15, watch a YouTube tutorial on surface cleaner attachments versus wand technique, and you can knock out a clean driveway in three to four hours of careful work. The result will not be as uniform as a pro's surface-cleaner pass, but it will be substantially cleaner than before. Single-story vinyl siding is also reasonable DIY for confident homeowners — a soft wash with a downstream detergent injector and 1500-2000 PSI rinse takes a Saturday but can be done without damage if you keep the wand level or angled slightly downward and never spray upward into the siding gap.

Wood deck cleaning is DIY-able but the most error-prone of the DIY surfaces. The temptation is to use the same pressure that worked on concrete — and it'll splinter the wood, raise the grain, and leave permanent wand marks if you let the tip get too close. The right DIY approach is to apply a deck cleaner like Krud Kutter or Simple Green Outdoor, let it dwell for 15-20 minutes, then rinse at low pressure (under 1500 PSI, 40-degree tip, wand at least 18 inches from the surface) in long even passes parallel to the boards. Done correctly the deck looks great. Done wrong it looks worse than before — and the damage doesn't sand out easily. If you've never pressure washed a wood deck, the pro charge of $180-380 is genuine value compared to ruining the surface and paying to refinish.

Roof cleaning is the one surface where you should not DIY, period. Three independent risks stack up: fall risk from working on a sloped surface 12-25 feet off the ground (pressure-washing fatalities happen every year, almost all from roofs), damage risk from using high pressure that strips shingle granules and voids your warranty, and chemical risk from handling sodium hypochlorite at concentrations strong enough to kill roof algae — these mixes are caustic enough to damage skin, lungs, and any plants downstream of runoff. A pro does this with proper safety lines, ground-based application via downstream injector, plant protection with pre-watering and tarping, and the right dilution ratio. The $380-680 roof soft-wash quote is not the place to save money. Same logic applies to any two-story siding work where you'd be on a ladder with a pressure wand — the recoil alone has caused serious falls.

Using too high pressure on wood. The single most common pressure-washing mistake in LA is treating a wood deck or wood fence with the same setup that worked great on concrete. High-PSI water (above 1500) on softwood lifts the grain, splinters the surface, and creates permanent wand marks that show up worse after the wood dries and the fibers stand up. The fix is wider tip angle (40-degree, never the 0-degree red tip on wood), greater wand distance (18-inch minimum), and lower pressure (1200-1500 PSI maximum). Better still, use a chemical deck cleaner and let chemistry do the work while pressure just rinses.

Skipping the detergent and trying to clean with just water. Embedded oil on a driveway, algae on a north-facing wall, mildew in the shaded corner of a patio, dried bird droppings — none of these come off with water alone, regardless of pressure. They need chemistry. A degreaser like Krud Kutter or Simple Green Pro Heavy Duty breaks down oil so the pressure can rinse it. A sodium hypochlorite mix kills algae and mildew so the rinse takes the residue with it. Wet & Forget gives a longer prevention period for surfaces prone to recurring algae growth. Without these, you're just moving dirty water around. Pros who show up with only a pressure washer and a hose are giving you a mechanical surface rinse, not a clean.

Spraying upward into siding. This is the mistake that turns a routine siding wash into a moisture problem inside the wall. Vinyl and lap-style siding has a small gap between each panel where the upper panel laps over the lower one — that gap is designed to shed water that falls from above, not to resist water sprayed upward. When you angle a pressure wand upward into siding, you force water behind the panels and into the building envelope, where it can soak insulation, damage drywall, and create mold. The right technique is to keep the wand level or angled slightly downward, work in horizontal passes from top to bottom, and never aim into the siding from below. Pros know this; first-time DIYers often don't.

Pressure washing windows. The standard pressure washer tip — even a 40-degree fan tip — delivers enough force at close range to crack window glass, blow out window seals on dual-pane glass, and damage the gaskets on slider tracks. Window cleaning is a separate service that uses low-pressure water-fed poles, squeegees, or hand-cleaning. If a pressure washer comes near your windows, the pro should be 6-10 feet away with a low-pressure soap tip, never close-range with a high-pressure wand. Confirm window-cleaning expectations before the work — most pressure-washing quotes do not include window cleaning, and the windows can look streaky from overspray after a siding wash even when nothing got broken.

Doing the curb-appeal sequence in the wrong order before a paint job or listing. The right sequence for pre-paint prep is wash first, let dry 7-14 days, then paint — never the reverse, and never wash the day before paint goes on. The right sequence for pre-listing curb appeal is wash 7-14 days before professional photos so surfaces look clean but not stark, and never wash the morning of the photo shoot when surfaces will still be visibly wet in patches. The right sequence when both repainting exterior and pressure washing the driveway is paint first (or paint and wash on different surfaces), then wash the concrete after — washing the driveway first and then painting drips fresh paint onto the clean concrete is a common avoidable mistake.