Types of Retaining Walls: Which One Is Right for Your Property?
A retaining wall can add both style and function to your yard by creating level areas on a sloped property, improving drainage, and expanding usable outdoor space. The three main categories are rock retaining walls, block retaining walls, and poured concrete retaining walls.
For homeowners considering block retaining walls, common options include Cornerstone, Manorstone, and larger ecology blocks. Each type of retaining wall block differs in strength, appearance, weight, cost, and suitability for residential projects. Rock walls also come in several forms, including dry-stack rock, stone-and-mortar, and gabion walls.
This guide compares the major retaining wall types, their advantages and disadvantages, typical costs, and the situations where each works best, so you can choose the right wall for your property.
| Wall Type | Common Options | Best Suited For |
|---|---|---|
| Rock Retaining Walls | Dry-stack rock, stone and mortar, gabion | Natural landscapes, slopes, erosion control, and landscaping |
| Block Retaining Walls | Cornerstone, Manorstone, ecology blocks | Terraces, structured landscapes, patios, driveways, and engineered walls |
| Poured Concrete Walls | Poured concrete with optional decorative finishes | High-strength and specialized retaining-wall applications |
Wall type is only one factor that affects project cost. For a broader look at materials, site conditions, labor, drainage, permits, and other considerations, see our guide to retaining wall costs in Seattle.
Rock Retaining Walls
Rockery walls are built by carefully stacking boulders or natural stones of varying shapes and sizes. Because no two rocks are alike, this style of retaining wall offers an organic, natural appearance that blends beautifully into both residential and commercial landscapes.
Block Retaining Walls
Concrete block walls are constructed from individual blocks that are uniform in size and shape. This consistency creates a clean, structured look and makes block walls a strong, reliable option for nearly any property.
Poured Concrete Retaining Walls
Poured concrete walls are made by forming and pouring concrete into a single, continuous unit. This monolithic structure provides exceptional strength and can withstand far greater soil pressure than most other wall types. While poured concrete is typically used in commercial applications, there are ways to adapt it for residential properties, as discussed later in this guide.
Each of these categories includes multiple sub-types of retaining walls, and understanding their differences can help you choose the right solution for your home or business.
Rock Retaining Walls
Dry-Stack Rock
Best for: Natural landscapes, rustic aesthetics, hillside stabilization, environmentally friendly designs.
Average price: Low
Pros
- Does not require mortar
- Relatively cost-effective
- Relatively light weight
- Good for DIY projects
Cons
- Lengthy building process compared with other rock walls
- Only good for walls that are 4 feet or less in height
Dry-stack rock walls are built without mortar, relying instead on the careful placement and weight of each stone to create a stable structure. Because there’s no binding material acting as “glue,” dry-stack walls are best suited for residential retaining walls 3 feet tall or less, making them a popular choice for small landscaping projects and DIY installations. The lack of mortar typically makes dry-stack construction more affordable than other retaining wall types, but it also requires skill and patience—each stone must be selected and positioned with precision, which can extend the overall building process.
Dry-stack walls tend to look more uniform than a traditional rockery wall, though natural variations in stone size, texture, and shape will still create subtle differences from rock to rock.
Stone and Mortar
Best for: Decorative landscapes, raised garden beds, walls near patios or entries, clean and finished aesthetics.
Average price: Medium
Pros
- Mortar adds increased strength
Cons
- Heavier than other dry-stack walls
As the name suggests, a stone and mortar retaining wall uses mortar to bind the stones together, creating a heavier and more solid structure than a dry-stack wall. This added mass increases the wall’s strength and improves its ability to resist soil pressure, making it a reliable choice for many residential properties. However, because of the increased weight and structural rigidity, local building codes may specify height limits, reinforcement requirements, or engineering guidelines for stone-and-mortar construction.
Stone and mortar walls offer a timeless, classic look that pairs especially well with older homes or landscapes where a more traditional aesthetic is desired.
Gabion Walls
Best for: Erosion control, steep slopes, modern landscapes, environmentally friendly applications.
Average price: High
Pros
- Superior strength over other rock walls
Cons
- Looks less natural than other rock walls
A gabion wall is built by filling wireframe cages, known as gabion baskets, with small to medium-sized rocks. While gabion walls provide excellent strength and drainage, their wireframe structure creates a more industrial appearance compared to the natural look of traditional rock retaining walls. Homeowners who prefer a modern or engineered aesthetic often find gabions appealing, especially on properties with steep slopes or visible drainage needs.
There are two main types of gabion baskets: welded frames and twist-on (woven) frames. Welded frames are rigid, pre-fabricated cages with fixed dimensions, offering a clean, uniform look. Twist-on frames are made of flexible woven wire that can be shaped and curved as needed, making them ideal for irregular layouts or custom contours.
Because the rock fill is held in place by durable wire mesh, gabion walls are exceptionally strong and resistant to erosion. In addition to residential soil retention, gabions are commonly used in heavy-duty applications such as stabilizing road embankments, preventing landslides, and providing flood protection along riverbanks.
Block Retaining Walls
Block retaining walls offer a consistent, structured appearance and are available in systems designed for everything from small garden walls to large engineered applications. For more information about professional block-wall construction, see our Block Walls service page.
Cornerstone
Best for: Modern landscapes, structured garden areas, walls supporting patios or driveways.
Average price: Low
Pros
- Suitable for any sized project
- Lighter in weight than other block walls, which may allow faster installation
- Great for creating curves, corners, steps, and terraced walls
Cons
- Reduced strength compared to concrete and engineered blocks
Cornerstone block systems are one of the most versatile options for building strong, long-lasting retaining walls of almost any height. They’re an excellent choice for homeowners who want a consistent, cohesive look across multiple retaining walls throughout their property. Cornerstone blocks come in both standard rectangular units and a specialized hexagonal shape, which is ideal for creating curved retaining walls and landscape designs with flowing lines. The blocks feature removable wedges that allow installers to achieve curves of varying tightness, providing exceptional design flexibility. Their hollow core also makes Cornerstone blocks lighter and easier to work with than many other concrete block systems, helping ensure efficient installation and reliable structural performance.
Manorstone
Best for: Decorative garden terraces, residential front yards, curved walls.
Average price: Low
Pros
- Inexpensive and readily available
- Light weight
- Good for DIY projects
Cons
- Not ideal for larger walls due to lower strength
Manorstone blocks offer a slightly more rustic, natural look compared to Cornerstone while remaining relatively lightweight and easy to handle. They provide a nice balance between uniformity and organic texture, making them a popular choice for garden beds, terraces, and decorative landscape features. Manorstone is also one of the most affordable block materials and is widely available in most regions. While Cornerstone blocks can be engineered for walls of almost any size, Manorstone is best suited for walls 4 feet tall or lower, which also makes it a great option for small projects or DIY-friendly installations.
Ecology Blocks
Best for: Large slopes, utilitarian applications, commercial or industrial settings, backyards with significant grade changes.
Average price: Medium
Pros
- Good for commercial projects
Cons
- Extremely heavy
- Not good for residential retaining walls
Most block wall systems work well for both residential and commercial applications, but ecology blocks are a notable exception. These oversized precast blocks, often weighing around 4,400 lbs. each, are typically used for large commercial or industrial retaining walls, such as those found along highways or major infrastructure projects. Because of their extreme weight, they are not well-suited for typical residential properties. Applying that much concentrated load to a small slope can actually increase the risk of shifting or wall failure. Since the goal of a retaining wall is to stabilize the soil, using blocks this heavy in a backyard setting can be counterproductive.
Poured Concrete Retaining Walls
Finishing Concrete Walls With Stone Veneer
Best for: High-visibility areas, front yards, entryway accents, premium landscapes.
Average price: High
Pros
- Good for commercial and residential projects
- Multiple applications outside of retaining walls
- Long-lasting
Cons
- Limited structural capacity
Stone veneer isn’t a retaining wall on its own, but rather an aesthetic facing applied to the outside of a poured concrete or CMU block wall. Its purpose is to enhance visual appeal by giving the wall a premium, natural look. Stone veneer comes in two types: artificial veneer, made from cement, aggregates, and iron oxides, and natural veneer, which is cut from the same stone typically used for dry-stack rock walls. Beyond retaining walls, stone veneer is also used for siding, fireplace surrounds, entry columns, and a wide range of residential and commercial hardscaping features.
Although stone veneer tends to be more expensive than other wall materials, it is highly durable, low-maintenance, and provides a long-lasting finish that elevates the look of nearly any landscape or structure.
Choosing the Right Retaining Wall
Retaining walls come in many forms, and choosing the right one for your property can feel overwhelming at first. Once you understand the differences between each type and how they perform in various conditions, it becomes much easier to identify the wall that fits your needs, budget, and long-term goals.
Need Help Choosing or Building a Retaining Wall?
If you already have a retaining wall style in mind or want professional help with planning, design, or construction, our team would be happy to assist. Contact Seattle Rockeries for a quote or reach out with any questions about the best option for your property.
Prefer to tackle a smaller project on your own? Take a look at our How to Build a Retaining Wall guide for step-by-step information on DIY rockery and block wall installation.
Interested in receiving quote. 200 ft by 3ft