GreenTree restores Portland concrete to a clean, slip-free finish, lifting moss, algae, oil, and rust from driveways, patios, and walkways across Multnomah County. Every job is backed by a written price-lock quote, $2M insurance, and our Triple Protection Guarantee.
Written and reviewed by Andreas Benavente, Founder of GreenTree Services.
Most concrete cleaning in Portland runs $200 to $450, and a standard two-car driveway runs about $150 to $300. GreenTree uses a flat-surface cleaner for an even finish, pre-treats oil and rust, and locks the price in writing first.
Portland gets about 43 inches of rain across roughly 155 wet days a year. As a result, concrete stays damp for months. That moisture feeds the black algae and green moss that make driveways slick.
Multnomah County sits in the Portland metro, where mild and wet winters keep porous concrete soaked. Moss takes hold first on the shaded north side of a home. Then it spreads across the whole slab. Because the growth holds water against the surface, it also speeds up the freeze-thaw cracking that Oregon winters cause.
There is a safety side too. For example, a mossy driveway turns slippery in the rain. That is a real liability for a Portland homeowner or a landlord. A professional concrete cleaning clears the growth at the root. In addition, it restores traction and protects a surface you have already paid for.
Moss and algae are only the start. Our crew also lifts oil and transmission drips, rust from patio furniture and sprinkler heads, and leaf and tannin stains under trees. Finally, we clear the grey film that builds up season after season. Each stain type needs its own treatment, which is why a single pass with a store-bought washer rarely gets it all.
From the front of the property to the back, we handle every surface that needs it.
The biggest, most visible slab. We lift oil, moss, and the grey film for an even, bright finish from curb to garage.
Front paths are where slip risk is highest. We clear the algae that makes them slick in the rain.
Outdoor living space, cleaned without etching. We adjust pressure for stamped and colored concrete.
Oil, brake dust, and rust come up with a degreaser treatment that cold water alone cannot lift.
The detail areas a flat cleaner misses. We hand-detail edges, joints, and vertical concrete.
Storefront entries, sidewalks, and lots, scheduled after hours so you never lose foot traffic.
A four-step process that matches the method to the surface, so it comes clean without damage.
First, we walk the property with you. We note oil, rust, and organic stains. Then plants and fixtures get protected before any water touches the slab.
Next, oil and grease get a degreaser. Rust gets a rust remover. Moss gets a solution that kills the growth at the root. Pre-treating lifts what pressure alone leaves behind.
We then run a flat-surface cleaner across the concrete rather than a bare wand. As a result, the pressure stays even and avoids the zebra striping a wand leaves.
Finally, we hand-detail the edges and steps a flat cleaner cannot reach. Then we rinse the area. We can also apply a sealer that repels water and slows the moss.
concrete cleaning in Portland typically runs $0.15 to $0.40 per square foot, so most jobs land between $200 and $450. A two-car driveway runs about $150 to $300, and heavy oil or rust adds to that. GreenTree quotes the full price in writing first.
The price of concrete cleaning in Portland depends on three things. These are the square footage, how much staining is present, and whether you add sealing. Every figure is locked in writing before we start, so the number on the quote is the number you pay.
| Concrete Cleaning service | Typical Portland price | Notes |
|---|---|---|
| Two-car driveway | $150 to $300 | Standard plain concrete, moss and film removal |
| Driveway with heavy oil or rust | $225 to $400 | Adds degreasing and rust treatment |
| Patio or pool deck | $175 to $350 | Pressure adjusted for stamped or colored concrete |
| Sidewalks and walkways | $120 to $250 | Often bundled with a driveway clean |
| Concrete sealing (add-on) | $1.00 to $2.00 / sq ft | Repels water, slows moss regrowth |
| Whole-property concrete package | $350 to $700 | Driveway, walks, and patio together, best value |
For comparison, replacing a cracked, moss-damaged driveway costs $4 to $8 per square foot, which is thousands of dollars. A yearly concrete cleaning in Portland protects that surface for a small fraction of the replacement cost.
Different surfaces need different methods. Here is when each applies.
GreenTree chooses the method after looking at your concrete, so you never risk a decorative patio getting blasted or a stubborn driveway getting a weak rinse.
A rotating attachment that cleans concrete evenly and avoids wand striping.
degreaser cuts oil and grease on driveways and garage floors that cold water leaves behind.
Targeted degreasers, rust removers, and moss treatments matched to each stain.
Full PSI for plain concrete, low pressure for stamped, so nothing gets etched.
GreenTree is a family-run Oregon exterior cleaning company. It was founded by Andreas Benavente. The company holds an Oregon Registry #2424331-91. In addition, it carries $2M in general liability coverage. GreenTree also holds a 5.0-star Google rating from more than 30 verified reviews. Every concrete cleaning in Portland comes with the Triple Protection Guarantee.
The crew is made up of trained W-2 employees, not day-labor subcontractors. As a result, the same standards apply on every Portland job. Andreas Benavente built the company on that consistency. Finally, every job finishes with before-and-after photos, so you can see the result even if you were at work while we worked.
GreenTree Services holds a 5.0-star rating across 30+ verified Google reviews. We are Oregon-registered (Registry #2424331-91), carry $2M in general liability, and back every job with the Triple Protection Guarantee. You can read our verified reviews on Google.
Free written quotes. Call (971) 280-2861.
Our crew works throughout Portland, including the Pearl District, Sellwood, Hawthorne, Alberta, Laurelhurst, St. Johns, Multnomah Village, and Irvington, plus nearby Beaverton. Wherever you are in Multnomah County, the wet the Portland metro climate is the same. So the work follows the same yearly cycle, and we schedule accordingly. Founder Andreas Benavente set up that seasonal cadence so no Portland property gets missed.
Concrete Cleaning in Portland works best as part of a full exterior plan. For that reason, many homeowners pair it with our concrete cleaning service. They also book it alongside concrete cleaning in nearby Beaverton for a rental or second property. GreenTree handles the scheduling, so the whole job lands in one visit.
Most concrete cleaning in Portland runs $200 to $450, and a standard two-car driveway runs about $150 to $300. Heavy oil, rust, or added sealing changes the figure, so GreenTree quotes the full price in writing first. For comparison, replacing a damaged driveway costs $4 to $8 per square foot, which makes a yearly clean the far cheaper choice.
Not when the pressure matches the surface. We run full pressure on plain concrete with a flat-surface cleaner for an even finish. We drop to low pressure with a soft-wash approach on stamped, colored, or sealed concrete. That is how the slab gets clean without etching or pitting.
Yes. Oil and grease get a degreaser and a pressure washing that cold water cannot match. Rust gets a targeted rust remover. We pre-treat these stains before the main clean, which lifts what a plain rinse leaves behind. Very old, deep stains may lighten rather than vanish, and we tell you that honestly at the quote.
Once a year keeps Portland concrete free of the moss and algae that the 43 inches of annual rain encourage. Shaded areas on the north side of a home may need it twice a year. A yearly clean also lets us catch small cracks before Oregon’s freeze-thaw makes them worse.
Yes, and we treat it differently from plain concrete. Stamped, stained, and colored concrete gets low pressure plus a cleaning solution rather than high-PSI blasting, so the finish and the color stay intact. We confirm the concrete type at the quote and set the method accordingly.
Spring through early fall is ideal, when surfaces can dry between Portland rain events. That said, concrete cleaning works year-round here. Many homeowners book a clean in late winter to clear the moss that built up over the wet months. GreenTree schedules around the forecast either way.
Sealing is optional but worthwhile in Portland’s wet climate. A concrete sealer repels water and slows how fast moss returns, so the clean lasts longer. We can apply it right after cleaning for $1 to $2 per square foot. Sealer is best refreshed every two to three years.
A typical Portland driveway takes one to three hours depending on size and how much staining is present. A whole-property package with the driveway, walkways, and patio usually takes most of a day. We give you a clear time window when we lock the quote.
Portland’s mild, wet winters and roughly 155 rainy days a year keep concrete damp for months. Damp porous concrete is exactly what moss and algae need. The shaded north side of a home grows it fastest. A yearly clean removes the growth at the root and restores traction.
Yes. GreenTree cleans storefront entries, sidewalks, dumpster pads, and lots for Portland businesses, and we schedule after hours so you never lose foot traffic. Commercial work is quoted by the square foot and comes with the same $2M coverage and written pricing as our residential jobs.
Yes. GreenTree is Oregon-registered and carries $2M in general liability coverage, and we provide the documents on request. That clears the vendor requirement most Portland property managers set, and it protects you if anything goes wrong.
A regular pressure wash often means one person waving a wand, which leaves stripes and misses oil and rust. Our concrete cleaning uses a flat-surface cleaner for an even finish, pre-treats each stain type, hand-details the edges, and offers sealing. The result is a uniform, longer-lasting clean rather than a quick rinse.
Get a written, price-locked quote for concrete cleaning in Portland today. $2M insured, Oregon-registered, Triple Protection Guarantee on every job.
Looking for concrete cleaning near me in Portland? GreenTree routes crews across the region. Additionally, the concrete cleaning near me hub lists where we work.
Accountability starts at the top with founder Andreas Benavente. As a result, GreenTree carries $2M in liability insurance and an Oregon Registry #2424331-91. The company also holds a verified 5.0 star rating and guarantees work through Triple Protection. Andreas Benavente makes that promise in writing.
Service area: GreenTree’s Portland service area covers Multnomah County end to end, including ZIP codes 97201, 97202, 97209, 97214, 97217, and 97232. That reaches downtown, the Pearl District, and the Central Eastside.