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Hiring a Landscaper for a Retaining Wall in Spokane
Hiring a landscaper for a retaining wall in Spokane usually means a site visit, a design and written estimate, a permit if the wall needs one, then a few days of construction. Automated Lawn & Pest Control builds retaining walls as part of its landscape design and construction work. Whether a wall lasts comes down to drainage, base prep and the right wall type.
or call (509) 818-1831
A retaining wall looks simple from the street: a row of block holding back a slope. Whether it stands for decades or starts leaning in a few seasons is decided mostly underground. Here's what hiring a landscaper for a retaining wall actually involves, what to ask and what drives the price, from the team behind our landscape design and construction work in Spokane.
What does a retaining wall do, and when do you need a pro?
A retaining wall holds back soil where the ground changes level. It can turn a slope into flat, usable yard, keep a bank from eroding onto a patio or driveway and create terraces for lawn and planting beds.
A low garden edge, a course or two of block, is a reasonable DIY project. Bring in a pro when:
- The wall needs to be more than a course or two high
- It holds back a slope that's already moving or eroding
- It sits near a house, driveway, fence or patio
- Water drains toward it from above
Those walls face real soil and water pressure. Mistakes show up as leaning, bulging or collapse, often within a few seasons.
How does hiring a landscaper for a retaining wall work?
Every company runs it a little differently. Here's how a landscape project, retaining walls included, works with Automated Lawn & Pest Control:
- Free consult and site visit. We talk through your goals and budget, take measurements and have a realistic discussion about timeline and cost.
- Design and estimate. You get a concept plan, material options and a clear written estimate. We adjust the plan until it fits your goals.
- Permits and construction. We handle the permit when a wall needs one, order materials and manage the crew, with daily updates while the work is underway.
- Completion and care. A final walkthrough to make sure you're happy, plus care instructions and optional ongoing maintenance.
At the site visit, any good landscaper should be looking at your soil, the slope, where water drains and how equipment will get in. Before anyone digs, underground utilities get marked through Washington's free 811 locate service. Our landscape projects also cover irrigation and grading, so sprinkler lines in the way of a new wall can be rerouted as part of the same project.
Communication matters more than most people expect, weather delays included. Nora S. described a backyard project with river rock and a brick path in a Google review: “There were a couple of delays due to the rainy weather but they made up for it by working diligently once they were here and completed everything on time. We were kept updated regularly on when they would come and when they would be back.”
Which type of retaining wall is right for your yard?
The right wall depends on its height, the slope and soil behind it, how much room there is and the look you want.
| Wall type | How it holds the slope | Good fit for |
|---|---|---|
| Segmental block | Interlocking concrete blocks stacked without mortar and stepped back into the slope, with geogrid reinforcement on taller walls | Most residential walls, including curves, corners and terraces |
| Natural stone | The weight of the stone holds the soil back | Lower walls and a natural look |
| Poured concrete | Steel-reinforced concrete on a footing | Walls close to houses, garages and driveways, or where space is tight |
| Timber | Treated wood or landscape ties anchored back into the hillside | Low, budget-minded walls. Wood has the shortest lifespan. |
Ask why a particular wall type is being recommended for your slope. A good answer covers the soil, the height, the drainage and what the wall has to hold up.
Why do retaining walls fail?
Most retaining walls fail because of water, a weak base or missing reinforcement, not bad block. Water trapped behind a wall adds pressure it wasn't built to hold, and Spokane's freeze-thaw cycles make wet soil push even harder.
A well-built wall includes:
- Drainage behind the wall: clean, angular gravel backfill, a perforated drain pipe at the base and an outlet where the water can escape. Filter fabric keeps soil from clogging the gravel.
- A compacted base: a trench dug below grade and filled with compacted crushed rock, with the first course of block set perfectly level. Everything above depends on it.
- Reinforcement on taller walls: layers of geogrid, a synthetic mesh, laid back into the compacted soil behind segmental walls so the wall and soil act as one mass.
- Engineering when it's needed: tall walls, walls on poor soil and walls holding up a driveway or building may need an engineer's design.
Ask any landscaper how they handle drainage and base prep. If the answer is vague, keep looking.
Do you need a permit for a retaining wall in Spokane?
Not usually for a short wall, but taller walls do. Under the building codes Washington adopts, a retaining wall generally needs a permit once it's more than 4 feet tall, measured from the bottom of the footing to the top of the wall, or when it holds back extra load (a surcharge) such as a driveway or a building above it. Those walls may also need an engineer's stamped design.
Rules can vary, so check with the City of Spokane or Spokane County, depending on where the property is, before you build. On our projects, we handle the permit when a wall needs one.
How long does a retaining wall project take?
Once materials are on site, building a typical residential wall takes a few days. Longer, taller or multi-tier walls take longer, and so do tight access, rock in the excavation and wet weather. Design, any permit and scheduling add time up front.
Expect machinery, noise and a torn-up work area while the wall goes in. A good crew protects driveways and walkways where it can and cleans up at the end of each day.
Spring through fall is wall-building season in Spokane. Frozen or saturated ground can't be compacted properly, so work pauses in deep cold and very wet weather. Spring schedules fill up, so it pays to start the conversation early.
What affects the cost of a retaining wall?
Retaining wall prices vary widely, so be wary of a quote given without a site visit. The biggest factors are:
- Height and length of the wall
- Material: timber, segmental block, natural stone or poured concrete
- Excavation, grading and hauling away excess soil
- Drainage stone, drain pipe and base material
- Geogrid reinforcement and any engineering
- Access for equipment, and any rock or debris found while digging
- Steps, curves, caps and other features
- Rerouting sprinkler lines the wall crosses
- Permit fees
A detailed estimate breaks these out as line items, so you can compare quotes on what's actually included. Ask how changes are handled if the crew hits rock or buried debris.
What should you ask before hiring a landscaper?
- Can I see photos of similar projects you've built?
- How will you handle drainage behind the wall?
- How deep is the base, and how is it compacted?
- Which wall type do you recommend for this slope, and why?
- Will you pull the permit if one is needed?
- Is the estimate itemized, and is there a written contract?
- What warranty covers the workmanship, and for how long?
- Are you registered as a contractor with Washington L&I?
Red flags: a vague estimate with no line items, no written contract, brushing off questions about drainage or permits and pressure to sign on the spot.
How do you get a retaining wall quote in Spokane?
Start with a site visit. Automated Lawn & Pest Control's landscaping team designs and builds retaining walls, patios, walkways, curbing and planting around Spokane. See examples of our work in the South Hill landscape renovation and the new-home landscape and sprinkler install, then request a free consult or call (509) 818-1831.
Questions
Retaining Wall Questions
Can I build a retaining wall myself?
A low garden wall, yes, if you dig a proper base and include drainage. Anything taller, holding back a real slope or near a structure is better left to a professional, because mistakes in excavation, base prep, drainage and reinforcement tend to show up as a leaning wall a few seasons later. Automated Lawn & Pest Control's landscaping team can look at the site and tell you which kind of wall it needs.
What is the cheapest type of retaining wall?
Treated timber usually costs the least up front, but it also has the shortest lifespan because the wood eventually rots. Segmental concrete block costs more but lasts much longer when it's built with proper drainage, which often makes it the better value. Natural stone and poured concrete are typically at the higher end.
How long does a retaining wall last?
A well-built block, stone or concrete wall can last for decades, while timber walls need replacing much sooner. Lifespan depends as much on the drainage and base as on the material. Keep drain outlets clear, keep heavy vehicles back from the top of the wall and watch for leaning, bulging or gaps between blocks, which are early signs to have it looked at.
Last updated September 18, 2026