Can I Build a Fence on a Retaining Wall?

If your property in Fraser Valley or Lower Mainland has a retaining wall, you might wonder:

“Can I install a fence on top of my retaining wall for privacy and safety?”

The short answer is YES—but there are important factors to consider before you start. In this guide, we’ll cover whether it’s possible, the best practices, and what to expect when combining fencing and retaining walls.

Is It Legal to Build a Fence on a Retaining Wall?

Yes, it’s generally allowed, but local building codes and safety regulations will dictate:

Maximum Height – Many municipalities limit the combined height of the wall + fence.
Engineering Requirements – Higher walls and fences may need structural reinforcement.
Permit Rules – Some cities require a building permit for this setup.

Always check with your local city office or work with a professional fencing contractor who understands the regulations.

What Are the Challenges?

Building a fence on a retaining wall is not as simple as drilling posts into the wall. Key challenges include:

Structural Load – The wall must support the weight and wind load of the fence.
Anchoring Method – Improper anchoring can cause the wall to fail over time.
Drainage – Poor planning can lead to water pressure issues behind the wall.

Best Ways to Add a Fence to a Retaining Wall

1. Core Drilling & Post Anchors

The most secure method is drilling into the wall and setting posts with heavy-duty anchors.

2. Behind-the-Wall Mounting

Install fence posts directly behind the retaining wall instead of on top. This avoids extra pressure on the wall.

3. Hybrid Design

Combine a short fence with a taller retaining wall for stability and aesthetics.

👉 Learn more about our Retaining Wall Construction Services for strong, long-lasting solutions.

Cost Considerations

The cost to build a fence on a retaining wall is usually higher than a standard fence because of:

Additional hardware and anchors
Structural reinforcement
Possible engineering or permit fees

👉 Check out How Much Does It Cost to Build a Fence Around My Property?
👉 Or read How Much Do Fencing Contractors Charge in Fraser Valley and Lower Mainland?

What Is the Cheapest Way to Do It?

If you’re on a budget, consider:

Installing the fence behind the wall instead of on top.
Using lighter materials such as vinyl fencing instead of heavy wood or metal.

👉 Read What is the Cheapest Option for a Retaining Wall? for cost-saving tips.

Why Choose H & A Fencing for Fence & Retaining Wall Projects?

At H & A Fencing, we specialize in fence installation and retaining wall construction in the Fraser Valley & Lower Mainland. Our team ensures your structure is safe, beautiful, and built to last.

📞 Contact us today for a free consultation on your combined retaining wall and fence project.