Home › Portfolio › Paver Patio and Seat Wall Under a Deck in Beaverton, OR
Sta-Built Construction turned the bare slope under a raised deck in Beaverton, OR into a level paver patio in June 2026. The patio is held up by a block retaining wall with a seat wall on top, a Belgard seat couch wraps one corner, and a long run of paver steps climbs the side yard to the gate. The work order covers about 440 square feet of pavers, 117 linear feet of steps, and a 10-light package, with 66 square feet of pavers and lighting for the steps added by change order.
Project Details
- Location: Beaverton, OR
- Service: Paver patio with a retaining wall, seat wall, seat couch, side yard steps, and landscape lighting
- Paver area: about 440 sq ft on the work order, plus 66 sq ft added by change order; laid out about 36 ft long and 9 to 11 ft deep under the deck
- Field paver: Belgard Dimensions 12 in Chiswick, with a Midnight runner border
- Retaining wall: Diamond 10D block in Rio, with a seat wall built on top; 61 ft of wall base prep and 183 sq ft of wall face, geogrid in the wall
- Seat wall and couch: 36 ft of seat wall and a 12 ft Belgard seat couch in Weston Stone untumbled Rio, with one row of Charcoal along the couch
- Grade wall: 72 ft of grade wall up to 8 inches
- Steps: 117 linear ft of step build, Marina coping treads with a Midnight 3×9 runner behind each tread
- Lighting: 10-light package, plus step lighting added by change order
- Aggregate: 14 cubic yards of 5/8 or 3/4 minus gravel
- Built: late May to mid June 2026
- Project investment range: $50,600 to $79,600
- Warranty: 27-Year Craftsmanship Warranty on the pavers and steps; 17-Year Craftsmanship Warranty on the walls
Before and after
The problem
This house has a raised deck across the back, and the ground under it falls away from the foundation. Site visit photos from late February and March 2026 show bare dirt and weeds under the deck, concrete post footings standing out of the slope, and a side yard that runs uphill along the fence to the gate with no path at all. The space under the deck was covered from the weather but could not be used.
The solution
The design sheet levels the area under the deck into a patio about 36 feet long, held on its downhill side by a retaining wall with a seat wall built above it. A Belgard seat couch fills the far corner, and a stair runs the length of the side yard, down from the gate to the patio. The project file also holds 3D renderings of the patio, seat couch, and stairs made at the design stage in March.
The deck posts stay where they are. Where a post lands near the steps, the design sheet calls for it to be boxed in block with Charcoal half caps cored with a 6 inch hole for the post. In March the homeowners added 66 square feet of pavers by change order, and in June they added lighting for the steps.
The materials
The patio field is Belgard Dimensions 12 in Chiswick, a large-format paver laid in a mixed pattern, framed by a Midnight runner border. The retaining wall is Diamond 10D block in Rio, with geogrid in the wall. The seat couch is Weston Stone untumbled in Rio with one row of Charcoal along it, and the stair treads are Marina coping with a Midnight 3×9 runner set behind each one, set on block step bases.
How it was built
Work started May 29, 2026. The work order includes 61 feet of wall base prep and 183 square feet of wall face, 24 feet of geogrid, and 14 cubic yards of 5/8 or 3/4 minus gravel. By June 9 the first wall courses were going in around the deck posts, and on June 10 the photos show woven fabric over the leveled grade under the deck with the first pavers going down on it.
The stairs went in from June 10 to June 13, block bases first and then the coping treads. The seat wall, seat couch, and caps were finished by June 13, and the completion photos were taken June 16. Photos taken after dark once the work was done show the lights working in the seat wall and on the steps.
The finished result
The slope under the deck is now a level patio with seating built into its edge, the deck footings sit inside the paving or the wall, and the side yard has a stair from the gate to the patio instead of a dirt hill. A clean and seal of the finished pavers was added by change order on June 17.
What a project like this costs
Project investment range: $50,600 to $79,600. This range reflects the scope of this completed project and is not a current quote.
Most of this price is in the walls and steps rather than the patio surface. Leveling a slope takes a retaining wall with geogrid before a single paver goes down, and this one carries a seat wall and a seat couch on top. The 117 linear feet of steps up the side yard are their own build. The range is based on the contract total; the three change orders on the record (66 square feet of added pavers, step lighting, and a clean and seal) were tracked separately.
See more on our paver patio page, seat wall page, and landscape lighting page, and our Beaverton service area. Related projects: a curved grade wall and raised patio in Beaverton and a retaining wall project in Portland.
Related questions
What does a paver patio with a retaining wall and seat wall cost in Beaverton, OR?
This project came in between $50,600 and $79,600, covering about 440 square feet of Belgard Dimensions 12 pavers, a Diamond 10D retaining wall with a seat wall and seat couch, 117 linear feet of steps, and a 10-light package. The range reflects this completed project and is not a current quote.
Can you build a patio under a deck on a slope?
On this project the ground under the deck was leveled and held with a block retaining wall on the downhill side, with geogrid in the wall. The existing deck posts stayed in place; the paving and wall were built around their footings.
What materials were used?
Belgard Dimensions 12 in Chiswick with a Midnight runner border for the patio, Diamond 10D block in Rio for the retaining wall, Weston Stone untumbled in Rio for the seat couch, and Marina coping treads with a Midnight 3×9 runner for the steps.
Where are the lights?
The contract included a 10-light package, which the night photos show set into the face of the seat wall. Lighting for the steps was added by change order in June.
How long did the installation take?
Work started May 29, 2026. The walls, patio, and steps were finished by June 16, and the record closes the job on June 20.
Planning something similar?
If the space under your deck or along your house is a slope you never use, Sta-Built can walk it and show you what a wall, a patio, and a set of steps would take. Schedule a free design consultation.
This project documentation was prepared by Sta-Built Construction from the project records and photos from our crew, October 2026. Technical review by Ben Metsker, Manager.