Landscaping and Retaining Walls: What They Are and Why Your Property Might Need One

Developer D-Kode | Posted on June 30, 2025 |

Retaining walls might not be the first thing that comes to mind when you think about landscaping, but they play a vital role in both the function and appearance of your outdoor space. If your yard sits on a slope, has drainage issues, or simply needs more structure, retaining walls can solve problems while adding beauty and value to your property.

These hardscape features are more than just decorative; they’re engineered to hold back soil, create level areas, and protect against erosion. And when designed and built by professionals, retaining walls can become a seamless, eye-catching part of your landscape.

In this post, we’ll break down how landscaping and retaining walls work, explore the different types, and explain why your Bay Area property might benefit from having one.

What Is a Retaining Wall?

A retaining wall is a rigid structure designed to hold back soil, especially in areas where the landscape naturally slopes. Its main job is to prevent erosion, manage water runoff, and create level surfaces in yards or gardens that would otherwise be unusable due to uneven terrain.

While retaining walls serve an essential structural purpose, they also offer aesthetic value. With the right materials and design, they can complement your home’s architecture, frame garden beds, or define outdoor living areas with clean, modern lines.

Most residential retaining walls are built using materials such as:

Concrete blocks – durable and versatile, ideal for modern designs
Natural stone – timeless and rustic, perfect for blending into the landscape
Brick – classic and clean, often used in formal garden designs
Timber – more budget-friendly but may require more maintenance
Interlocking pavers – a popular choice for their ease of installation and customizable appearance

No matter the material, the key to a successful retaining wall is proper planning, engineering, and installation. Especially when it comes to supporting large amounts of soil or dealing with water flow.

Why Your Property Might Need a Retaining Wall

If your outdoor space has slopes, drainage problems, or uneven ground, a retaining wall could be more than just a design feature; it might be a necessity. These structures are not only used to improve the look of your yard but to solve real structural and safety challenges that come with Bay Area landscapes.

Here are some of the most common reasons homeowners choose to add retaining walls:

1. Managing Sloped Terrain

Many Bay Area properties sit on hills or uneven lots. Retaining walls help flatten portions of the yard, allowing you to create usable areas for patios, lawns, or gardens that would otherwise be too steep.

2. Preventing Soil Erosion

Heavy rainfall or poor grading can lead to soil erosion, washing away parts of your landscape over time. Landscaping and retaining walls go well together to hold the soil in place, especially in areas with loose or sandy soil, helping to protect your plants and property.

3. Improving Drainage and Runoff Control

Landscaping and retaining walls can be designed with built-in drainage systems to redirect water away from your home or problem areas. This is especially important if your yard tends to collect water or you’ve had issues with flooding.

4. Creating Functional Outdoor Zones

Retaining walls allow you to section your yard into levels which is great for separating a seating area from a play space, or a fire pit from a garden bed. Multi-level hardscaping adds both beauty and function to your landscape.

5. Boosting Curb Appeal

Beyond their utility, retaining walls add texture, shape, and architectural interest to your outdoor space. A well-designed wall can enhance the overall look of your yard and increase property value in the process.

Not sure if your property needs a retaining wall? If you notice sloping ground, pooling water, or areas of soil that shift easily, it’s worth consulting a professional to evaluate your landscape and suggest smart, long-term solutions.

Signs Your Property Could Benefit from a Retaining Wall

Not every yard needs a retaining wall, but for many Bay Area homeowners, it’s the one feature that can solve a host of landscape challenges. If you’ve noticed issues with slope, drainage, or yard usability, you may already have the early signs that a retaining wall would be a smart investment.

Here are five key signs to look for:

1. Your Yard Has a Noticeable Slope

If your outdoor space isn’t level, it can be difficult to enjoy or build on. A retaining wall helps carve out flat areas for patios, seating, or gardens, which turns unusable ground into functional living space.

2. You’re Seeing Erosion or Washed-Out Soil

After a heavy rain, does your soil shift or wash away? That’s a red flag. Retaining walls keep soil in place and prevent damage to landscaping, foundations, or nearby structures.

3. Drainage Is a Recurring Problem

Water pooling around your home or downhill from the garden can lead to serious issues over time. A professionally designed retaining wall can redirect runoff and improve your property’s drainage.

4. Your Outdoor Space Feels Disconnected

A well-placed retaining wall can help organize your yard into clear zones, like a garden bed, play area, or outdoor dining space, making it more attractive and functional.

5. You Want to Add Curb Appeal and Structure

Beyond their function, landscaping and retaining walls are a striking design element. They add dimension, texture, and contrast to your yard, often boosting property value in the process.

If one or more of these signs sound familiar, it may be time to consult with a hardscape professional. A properly built retaining wall can protect your investment, improve your landscape’s performance, and make your outdoor space more enjoyable year-round.

Popular Retaining Wall Materials (and How to Choose)

When planning a retaining wall, the material you choose plays a big role in both function and style. Each type of material has unique strengths and aesthetics, and a knowledgeable contractor can help match the right one to your landscape, budget, and design goals.

Here are the most common retaining wall materials used in Bay Area homes:

1. Concrete Blocks

These modular blocks are one of the most popular choices for residential retaining walls. They’re durable, cost-effective, and easy to install in various heights and patterns. Some even mimic the look of natural stone.

Best for: Modern landscapes, tiered walls, or projects needing strength and structure.

2. Natural Stone

From granite and limestone to fieldstone, natural stone offers unmatched beauty and a timeless appearance. While more expensive and labor-intensive, it blends beautifully into organic landscapes.

Best for: Rustic or high-end aesthetics, curved walls, and natural slopes.

3. Brick

Brick retaining walls are strong, stylish, and highly customizable. They work well with traditional architecture but require skilled installation to ensure longevity.

Best for: Formal gardens, historical homes, or decorative landscape accents.

4. Timber (Wood)

Pressure-treated wood or railroad ties offer a more rustic or natural look. While affordable upfront, wood doesn’t last as long as stone or concrete and may require more maintenance over time.

Best for: Shorter walls, informal garden borders, or budget-conscious projects.

5. Interlocking Pavers / Segmental Wall Systems

These manufactured blocks are designed to fit together securely without mortar. They’re ideal for DIY-friendly projects or contractor-installed systems that need a polished finish with efficient installation.

Best for: Functional and decorative walls up to 4 feet, customizable designs.

How to Choose the Right Material

Consider your home’s style: Match the wall to your home’s exterior or existing landscaping.
Think about durability: Natural stone and concrete last the longest with minimal upkeep.
Weigh your budget: Timber and pavers are often more affordable than custom-cut stone.
Look at height and load: Taller or load-bearing walls usually require engineered materials like concrete blocks or segmental systems.

A professional hardscape contractor like Kiwi Pavers can help you weigh your options and choose a material that suits your design vision and structural needs.

Retaining Walls vs. Landscape Edging: What’s the Difference?

Homeowners often confuse landscaping and retaining walls with landscape edging, but they serve very different purposes. While both define space in your yard, their function, structure, and construction methods are worlds apart.

Landscaping and Retaining Walls: Built for Structure

Designed to hold back soil and manage changes in elevation
Typically taller and structurally reinforced
Often require permits or engineering for height and stability
Used to prevent erosion, create tiered yards, or expand usable space
Built from stone, concrete, brick, or paver systems

Landscape Edging: Built for Definition

Used to separate garden beds, walkways, or lawns
Usually low-profile (6″–12″ tall)
Primarily decorative; not structural
Helps contain mulch or gravel and gives gardens a clean outline
Common materials: metal, plastic, wood, brick, or small stones

The key takeaway here is that if your yard needs support, drainage control, or elevation management, you need a retaining wall. If you’re simply looking to define spaces or contain landscaping materials, edging is the way to go.

Still not sure which one fits your yard? Kiwi Pavers can assess your property and recommend the best solution for both function and aesthetics.

When to Call a Professional

While some small landscaping projects can be DIY-friendly, building a retaining wall isn’t usually one of them. Especially if it’s meant to hold back large amounts of soil or manage drainage. A poorly constructed wall can collapse, cause water damage, or create safety issues. That’s why it’s important to know when it’s time to bring in a professional.

Here’s when you should call a retaining wall contractor:

1. Your Slope Is Steep or Unstable

If your property has a significant grade or loose soil, professional engineering and support systems are essential. A pro will ensure your wall is structurally sound and built to last.

2. You Notice Drainage Issues or Soil Movement

If you’re dealing with water pooling, erosion, or shifting ground, a professional can assess the problem and incorporate proper drainage into the retaining wall design.

3. The Wall Needs to Be Over 3–4 Feet Tall

Most cities, including many in the Bay Area, require permits and structural plans for retaining walls over a certain height. Professionals understand local regulations and can handle permitting for you.

4. You Want Long-Term Durability and Curb Appeal

An experienced contractor knows how to properly prep the site, choose the right materials, and install the wall so it’s both attractive and built to endure harsh weather and soil pressure.

5. You’re Not Sure Where to Start

Retaining walls involve more than stacking blocks around soil; they require planning, excavation, compaction, drainage design, and finishing. A pro can walk you through the process, recommend the best solution, and bring your vision to life.

At Kiwi Pavers, we specialize in designing and building custom landscaping and retaining walls that balance form and function. Whether you need a small decorative wall or a full-scale structural solution, our team is ready to help you protect and enhance your outdoor space.

Smarter Landscaping and Retaining Walls Starts Here

So, whether your yard is sloped, prone to erosion, or simply lacking structure, a well-built retaining wall can make all the difference. These essential hardscape elements offer more than just support; they bring beauty, organization, and added value to your outdoor space.

From protecting your property to enhancing your curb appeal, landscaping and retaining walls are an investment in both form and function. But getting it right takes expertise, experience, and attention to detail.

Let’s Reinforce Your Landscape the Right Way

Ready to solve slope issues or add structure to your yard? Contact Kiwi Pavers today for a free consultation. We’ll help you design a custom retaining wall that meets your needs, matches your home, and stands strong for years to come. Schedule your quote or use our instant quote feature to get an idea of what your project will look like.