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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The slope behind the house keeps sliding into the yard, or the lawn tilts too much to use. A retaining wall holds that ground back and gives you level space to work with. Green Tree Landscape and Maintenance builds retaining walls from segmental block, the interlocking concrete blocks made for walls.
We serve Tualatin and the south and west side of the Portland metro. The job can be one straight wall or a set of terraced walls with block steps. The flat ground a wall makes is room for a lawn or a paver patio. Call or text (971) 772-9892, and we look at the slope and put the quote in writing.
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.
Before the trench is dug, buried utility lines get marked through Oregon 811. Oregon law calls for that request at least two full business days before digging starts. Then we dig the base trench and build a compacted pad of crushed stone at least 6 inches thick.
The first course is leveled on that pad, block by block, because every course above follows it. Each course sets back a little from the one below, so the wall leans into the slope. On taller walls, layers of geogrid run from between the courses back into the compacted soil. Cap blocks finish the top.
Behind the blocks goes at least 12 inches of drainage gravel, with a drain pipe along the bottom. The gravel lets water in the soil drain away before pressure builds against the wall. Backfill goes in layers of 8 inches or less, and a plate compactor packs each one.
The Oregon Residential Specialty Code lets each city require a permit for retaining walls over 4 feet tall. The height runs from the bottom of the footing to the top of the wall. Shorter walls can need one too when they hold up a driveway or a slope steeper than 3 to 1. Statewide, a wall that supports a house, or holds back ground that could reach one, needs a building permit.
Tualatin and Portland both use the 4-foot line, and both add walls that hold up extra weight. In Lake Oswego, a wall over 2 feet that holds up extra weight needs a permit. Clean Water Services, the stormwater and sewer agency for urban Washington County, also reviews retaining walls.
Each city sets its own line within the state rule, so the city permit office has the final word. The permit question is settled before work starts.
On hillside lots in the West Hills and Lake Oswego, the yard can fall away steeply from the house. Terracing breaks that slope into shorter walls with level ground between them. Each level becomes usable ground for new planting beds or a small lawn, and block steps connect the levels.
We have built terraced block walls up a steep backyard, with block steps set into the walls. The space between terraces can matter for the permit. Lake Oswego counts walls within 5 feet of one another as one wall when it measures height.
Down on the flatter Tualatin Valley floor, many soils drain slowly and the water table rises in winter. There, a low wall can raise a planting bed or level a lawn that tilts toward the house. Where fine soil could clog the drainage gravel, filter fabric goes between the two. If the yard stays soggy near the wall, a French drain can be part of the plan.
Call or text for a written quote. We work about 10 to 15 miles around Tualatin across the south and west side of the Portland metro.
(971) 772-9892From the first call or text to the finished work, here is how it goes.
Call or text (971) 772-9892 and tell us about the yard and where it is. Send photos if you like.
We come out to see the yard and where the water runs. For the maintenance program, we look over the lawn and the beds.
You get the quote in writing, with the work spelled out. Once you say yes, we set a start date, and work days follow the weather.
Then the work starts, whether that is an install, a build or your first maintenance visit. On a new landscape, the soil is prepped and graded before anything goes in the ground.
We take a final look at the work with you, and the site is cleaned up. Then we go over what comes next, like watering new sod or the date of the next visit.
Common questions about retaining walls around Tualatin and the south and west metro. If yours is not here, call or text and ask.
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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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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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.
Learn MoreNew plantings, lawns, paver patios, retaining walls and drainage all come from one company. We can keep up the yard we build on our maintenance program.
Our landscape maintenance program runs all year at a flat monthly rate. The rate stays level through the quiet winter months and the busy leaf season.
The base under a paver patio is compacted in layers before the first paver goes down. Retaining walls get drainage gravel and pipe behind them. We install the backflow assembly the code requires on every new sprinkler system.
Real reviews of our maintenance, sod, sprinkler, patio and fence work, 15 reviews on Google.
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.
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.
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.
Retaining wall cost in Oregon for 2026: market ranges per square foot and per linear foot, plus the 4-foot permit line and why drainage matters.
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What a paver patio costs in Oregon: Portland-area prices per square foot and by size, what drives the price, and pavers versus concrete or gravel.
Read more →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.
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.