Dealing with groundhogs digging up your yard? You’re not alone. These burrowing animals can cause serious damage to gardens, foundations, and even utility lines. If you’re looking for a long-term solution, an underground fence is one of the most effective ways to stop them.
This guide covers everything you need to know about the best groundhog underground fences, how to install them, what to avoid, and what to expect in terms of cost and results.
Why Groundhogs Are So Hard to Keep Out
Groundhogs, also called woodchucks, are powerful diggers. Their burrows can be up to 6 feet deep and over 20 feet long. A regular above-ground fence won’t stop them—they’ll just tunnel right under it.
That’s why underground fencing is the best defense. It blocks their path and prevents them from getting access to your yard, garden, or foundation area.
What’s the Best Underground Fence for Groundhogs?
The best groundhog underground fence is a galvanized steel hardware cloth or welded wire fence with the following features:
- Wire gauge: 14-gauge or 16-gauge for durability
- Mesh size: 1-inch or smaller to prevent squeezing through
- Material: Galvanized steel (preferably PVC coated) to resist rust and corrosion
- Depth: Should be buried at least 18 to 24 inches underground
- Trench shape: L-shaped installation for best results
Top Recommended Options
| Product | Specs | Best For |
|---|---|---|
| YARDGARD 16-Gauge Hardware Cloth | 1/2″ mesh, 24″ width, galvanized steel | Small gardens, long-lasting protection |
| Amagabeli Welded Wire Fence | 1″ mesh, 36″ width, PVC-coated steel | Heavy-duty use, rust resistance |
| Tenax Pet & Wildlife Fence | Plastic mesh, not for burrowers | Above-ground use only (not recommended for groundhogs) |
Tip: Never rely on plastic or lightweight mesh for groundhog problems. These animals are strong and persistent diggers. Only steel mesh will hold up over time.
How to Install an Underground Groundhog Fence
Installing a groundhog barrier isn’t too complicated, but it does take effort. Follow these steps for a reliable and permanent solution:
- Choose your fencing: Get galvanized hardware cloth or welded wire, at least 24 inches in height.
- Dig a trench: The trench should be 18 to 24 inches deep and run the full length of the area you want to protect.
- Create an L-shape: Bend the bottom 6-12 inches of the fence outward to create a 90-degree angle. This L-shape stops digging right at the bend.
- Insert and secure: Place the fence into the trench and secure the top with stakes or attach it to an existing fence or barrier.
- Backfill the trench: Fill the trench with soil and compact it to discourage future digging.
This kind of installation lasts for years and stops groundhogs in their tracks before they reach your garden or shed.
How Much Does It Cost to Install a Groundhog Fence?
The cost of a groundhog underground fence depends on how large your property is and the materials you choose. But here’s a quick breakdown:
- DIY materials: $1.50 to $3.00 per foot for quality galvanized hardware cloth
- Tools: About $50 to $100 if you don’t already have digging tools, wire cutters, and gloves
- Professional installation: $10 to $20 per linear foot, depending on labor and terrain
Want to know how much you’d spend based on the type of pest? Use this pest control calculator to find out your estimated cost based on your pest problem and area size.
Signs That You Need an Underground Fence
If you’re seeing the following signs around your property, it’s likely time to act fast and install a proper barrier:
- Large, crescent-shaped holes near foundations or sheds
- Burrow entrances with scattered dirt piles
- Chewed plants and uprooted vegetables
- Structural damage near decks or patios
Underground fencing stops the damage before it starts. It’s a proactive solution, not a reactive one.
What Not to Do When Dealing with Groundhogs
Many homeowners waste money and time on methods that don’t work. Here’s what to avoid:
- Using repellent sprays: They rarely work long-term, especially for stubborn groundhogs.
- Ultrasonic devices: No scientific proof these stop burrowing pests.
- Traps without fencing: Trapping a few won’t solve the root problem. New ones will return if there’s no barrier.
- Ignoring burrows: One burrow can house a family. Don’t wait for the problem to grow.
If you’re unsure whether fencing is enough or you need professional help, check your cost first. Try this pest control price calculator and see what kind of investment it’ll take to eliminate your groundhog issue.
Final Thoughts: Groundhog Control That Actually Works
Groundhogs can be destructive, and traditional fencing alone won’t stop them. The best defense is an underground barrier made from strong galvanized steel, properly installed in an L-shape trench. It takes a bit of work, but it pays off for years in peace of mind.
If you’ve got an active burrowing problem or want to protect your property before it starts, use this pest control calculator to see how much it might cost to handle your specific situation.
Don’t wait until the damage gets worse—start building your defense today.
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