Maintenance, installs and hardscape across the south Portland metroLandscaping across the south Portland metro
Call or text (971) 772-9892 Oregon LCB #100151
Green Tree Landscape & Maintenance
Landscaping company in Lake Oswego, OR
Service Area

Landscaping Company in Lake Oswego, OR

Serving Lake Oswego · Clackamas County

Maintenance, Installation and Hardscape in Lake Oswego

Lake Oswego has many hillside lots, with backyards that drop toward Oswego Lake or the Willamette River. USDA soil maps show slopes of 8 percent or steeper on more than a third of the city. On lots like these, the slope behind the house keeps sliding into the yard. The flat ground below it stays soft from November to April.

Green Tree Landscape and Maintenance is a landscaping company serving the south and west side of the Portland metro. In Lake Oswego, we put in new landscapes and build segmental block retaining walls and patios. Our 12-month maintenance program keeps yards up all year at a flat monthly rate. Call or text (971) 772-9892, and we will look at the yard and put the quote in writing.

What We Do in Lake Oswego

Request a Quote in Lake Oswego

Tell us about the yard, the project or the maintenance you need and where it is. We look at the yard and put the quote in writing.

Lake Oswego homes and the yards around them

Lake Oswego has about 18,100 homes, and about 6 in 10 are detached single-family houses. By Census Bureau estimates, half were built by 1982. In Tualatin, the halfway year is 1992. Only about 1 in 10 Lake Oswego homes were built in 2010 or later.

In ZIP 97034, which takes in downtown, 37 percent of homes went up before 1970. In ZIP 97035, about half date from the 1970s and 1980s. A yard planted with a house that age may still have its first shrubs and its first sprinkler system. Some of those yards need a reset first, with new planting beds or a new lawn.

Why do some Lake Oswego yards stay wet all winter?

USDA soil maps put about a quarter of the city on Cascade silt loam, a somewhat poorly drained soil. About 20 to 30 inches down, it has a dense layer called a fragipan. In winter, water perches on top of that layer, and the ground above stays wet.

Some low ground along creeks maps as Cove silty clay loam, which is poorly drained. In that soil, the water table can sit within a foot of the surface from December to June. In the Portland area, October through May brings nearly 9 of every 10 inches of rain. On a lot where water sits all winter, a French drain can carry it to a proper outlet.

Lake Oswego runs its own stormwater system, and city rules allow only rainwater into the storm drains. Some lots got a stormwater facility when they were built, such as a drywell or a rain garden. The city requires a yearly inspection of each one, with a report sent in.

Retaining wall and fence rules in Lake Oswego

On a hillside lot, a retaining wall can turn a slope into a level lawn or a patio. Lake Oswego requires a building permit for any retaining wall over 4 feet tall. A wall over 2 feet needs one too if it carries a surcharge. A surcharge is extra load above level ground behind the wall, such as a slope.

The city treats retaining walls within 5 feet of each other as one wall when it measures height. So two 3-foot terraces set 4 feet apart count as one wall over 4 feet tall. In residential zones, a fence can reach 6 feet, or 4 feet within 10 feet of a street. A fence on or within 5 feet of a retaining wall tops out at 8 feet, wall and fence together.

Home landscaping that moves more than 50 cubic yards of fill needs a city erosion control permit. A new paver patio counts as a major site feature, so it needs one too. So does any work within 50 feet of a water body, such as the lake or a creek. The permit question is settled before work starts.

Leaf season and summer watering in Lake Oswego

In fall and winter, heavy leaf and pine needle buildup slows the city's street sweepers. Lake Oswego City Code bars blowing or raking leaves onto sidewalks and streets. Our fall leaf cleanup picks the leaves up from the lawn and beds. The monthly rate stays the same in leaf season as in the quiet winter months.

Lake Oswego's tap water comes from the Clackamas River through the Lake Oswego Tigard Water Partnership. The city runs weather stations that record rainfall and soil moisture to help set summer watering. Its conservation page also reminds residents to winterize irrigation systems for the season. A new automatic sprinkler system with a smart controller adjusts its watering to the weather.

Communities and areas we serve around Lake Oswego: Lake Grove, Westlake, Mountain Park, Palisades, Forest Highlands, First Addition, Old Town, Uplands, Glenmorrie, Lakewood, Waluga, McVey-South Shore.

Lake Oswego ZIP codes served: 97034, 97035.

View Lake Oswego, OR on Google Maps

Serving Lake Oswego and nearby

Lake Oswego is part of our service area. We look at the yard and put the quote in writing.

(971) 772-9892
Our Services in Lake Oswego

Every Service We Bring to Lake Oswego

Landscape maintenance: a freshly mowed lawn with mowing stripes curving along a river rock border

Maintenance

Mowing, edging, trimming, weeding, cleanups and four seasonal fertilizer applications on a 12-month program. The monthly rate stays the same in winter and in leaf season.

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Landscape installation: a new planting bed of perennials and shrubs in fresh soil along a curved walkway

Installation

New landscapes and full yard makeovers with planting beds, shrubs, trees, bark dust and rock. We plan the layout with you and put the quote in writing.

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Paver patios: a curved paver walkway with a border course leading to a new paver patio between planting beds

Paver Patios

Paver patios, walkways, steps and flagstone paths set on a compacted gravel base. Each patio slopes away from the house so rain runs off.

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Retaining walls: terraced segmental block retaining walls with built-in block steps on a sloped backyard

Retaining Walls

Segmental block retaining walls and terraced walls for sloped lots around Tualatin, with block steps where a path climbs. Each wall sits on a compacted gravel base with drainage gravel behind it.

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Sprinkler systems: pop-up sprinkler heads watering a new lawn beside a cedar fence

Sprinkler Systems

New automatic sprinkler systems for lawns and drip lines for planting beds, planned zone by zone. Every system runs from a controller and starts at a backflow assembly.

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Sod installation: laying rolls of new sod over graded, prepared soil

Sod

We strip the old lawn and lay new sod on prepared soil for homes around Tualatin. For a thin lawn, overseeding or a lawn renovation is the smaller fix.

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Artificial turf: a synthetic turf lawn in front of a large-format paver patio with a block seat wall and steps

Artificial Turf

Artificial turf lawns for backyards, side yards, play areas and dog runs, laid on a compacted rock base that drains. Turf stays green in the shade and through the dry summer.

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Landscape lighting: lights built into a block seat wall glowing at dusk beside a lawn

Lighting

Low-voltage LED landscape lighting for walkways, steps, trees and walls across the south and west metro. We add lights to a finished yard or build them into a new patio or wall.

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Wood fences: a new horizontal slat cedar fence on a stacked rock wall

Wood Fences

Cedar privacy fences with vertical boards or horizontal slats, and gates to match. We also repair leaning fences and replace rotted posts.

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French drains: river rock filling a drain trench along the side of a house

Drainage

French drains and catch basins for yards that stay soggy from November to April. Downspout drain lines and regrading send water away from the house.

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Google Reviews

Rated 4.9 on Google Around Tualatin

Real reviews of our maintenance, sod, sprinkler, patio and fence work, 15 reviews on Google.

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Carlos and team did a great job on our new paver patio and pathway. Communication was excellent and responses were quick. He shared examples of options and asked questions along the way to make sure we were getting what we wanted. We'll use them again for future projects without hesitation.

Justin Sand5 months ago · Google review

We had a great experience working with Carlos and his team. Carlos was professional, reliable, and easy to communicate with throughout the entire project. His pricing was very reasonable, and I really appreciated his attention to detail. He took the time to make sure the grading and sod installation were done correctly rather than rushing through the job. It’s clear Carlos takes pride in his work and cares about doing things well. We would absolutely hire him again and highly recommend him to anyone looking for landscaping or yard work.

Ruth Exleya month ago · Google review

He was very good. Review our system and did an upgrade. Checked all sprayer heads and adjusted as needed. He was very professional and efficient. Great job. Would recommend he to anyone who has a sprinkler issue.

Barbara Taylora month ago · Google review

Excellent service by thorough, competent people for the past several years.

Jeffrey Hicksa month ago · Google review

Our yard was a mess and Green Tree made it beautiful for us. They cleaned up the back yard and laid sod. That was an amazing transformation and the grass is still gorgeous. In the front yard they dismantled an aging pathway I put in years ago and replaced it with large stone and some kind of filler in any gaps so weeds don't grow. it's perfectly angled for water run off. It looks beautiful and every time see it I'm thrilled with the quality of work.

Jennifer Berniera year ago · Google review

Our experience with Green Tree has been very satisfactory they are predictable consistent and we believe we get a real value for our investments we've done business with them for many years and they have consistently met our needs

Lake Oswego FAQ

Questions We Hear Around Lake Oswego

A few of the questions we hear most around Lake Oswego. If yours is not here, call or text and ask.

Call (971) 772-9892

Which parts of Lake Oswego does Green Tree work in?
Lake Oswego is part of our service area, about 6 miles from Tualatin on Boones Ferry Road. We work across the city, from Westlake and Lake Grove to First Addition and Glenmorrie. Most of Lake Oswego lies in Clackamas County, with a small part in Multnomah County. Call or text (971) 772-9892 with your address, and we will set a time to look at the yard.
What drives the cost of landscaping in Lake Oswego?
On a hillside lot, the slope and the access for materials drive much of the price. A wall over 4 feet adds a building permit, and a new patio adds an erosion control permit. Wet ground that needs drainage adds to the job, and so do the materials you pick. We look at the yard and put the quote in writing.
Do I need a permit to take down a tree in Lake Oswego?
Often, yes. Lake Oswego's Tree Code was updated effective October 1, 2026, and the city's Planner on Duty answers tree permit questions. Check with the city before a tree comes down. Our program trims shrubs and small trees below six feet, and anything taller is quoted separately.
When is the backflow test due in Lake Oswego?
Lake Oswego requires a yearly test of each backflow assembly, due by July 15. A state-certified backflow tester does the test. If a system on vacuum breakers needs more than normal repairs, the city requires double-check backflow devices instead. When we install a new sprinkler system, the backflow assembly is part of the job.
Are there extra rules for lakefront yards in Lake Oswego?
The Lake Oswego Corporation manages Oswego Lake and Lakewood Bay. Its waterfront rules call for approved native plants in shoreline landscaping. Construction on its property, or next to the lake, needs the corporation's permit. A new fence or hedge on its property tops out at 4.5 feet.
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Tell us what the yard needs and which town it is in, and text us photos if you have them. Call or text (971) 772-9892 or use the form, and we will get back to you.

Request a Quote

Tell us about the yard, the project or the maintenance you need and where it is. We look at the yard and put the quote in writing.

Call (971) 772-9892