How To Get Rid Of Raccoons Under Deck: A Complete Removal And Prevention Guide

Getting raccoons out from underneath your deck requires a strategic multi-phase approach combining immediate eviction techniques, behavioral deterrents, and permanent exclusion hardware. Successfully resolving this wildlife conflict relies on verifying the absence of dependent kits before sealing any entry points to prevent inhumane animal trapping and structural odors.

Pre-Operation & Planning Checklist for Wildlife Eviction

Before deploying any deterrents or structural modifications beneath your outdoor living space, proper preparation ensures safety, legal compliance, and long-term success. Raccoons (Procyon lotor) are remarkably intelligent urban adapters capable of causing extensive property damage, and dealing with them requires methodical planning.

• Essential Gear, Tools, and Materials: Heavy-duty work gloves, a high-lumen tactical flashlight, a long-handled mirror, hardware cloth (1/4-inch or 1/2-inch galvanized steel mesh), heavy-duty exterior construction screws, cordless drill, tin snips, and a garden hose or pressure washer.
• Mandatory Prerequisite Knowledge and Standards: Verify local municipal regulations regarding nuisance wildlife, as some jurisdictions prohibit relocating captured mammals. Confirm whether it is breeding season (typically February through June) to avoid trapping dependent young underneath the deck.
• Estimated Budget and Duration Benchmarks: Financial investment typically ranges from 50 to 200 dollars for hardware cloth, fasteners, and deterrents. The entire process requires 3 to 7 days for behavioral eviction followed by a permanent exclusion build.

Step-by-Step Deck Eviction and Exclusion Workflow

Step 1: Inspection and Occupant Identification

• Conduct a thorough daytime and nighttime inspection around the perimeter of the deck using a flashlight to look for tracks, scat, flattened grass, and polished wood edges near entry points.
• Insert a mirror and flashlight underneath low clearance areas, or use a wireless inspection camera to visually scan the underside of the deck for nests, food caches, and resting raccoons.
• Determine if the animal present is a solitary adult, a seasonal visitor, or a female nursing dependent kits.

Warning: Never seal openings, plug holes, or deploy automated exclusion doors if there is any possibility that dependent kits are trapped underneath the deck. Unweaned kits left behind will die, causing severe foul odors and creating a biohazard beneath your structure.

Step 2: Deployment of Non-Toxic Behavioral Deterrents

• Create an inhospitable environment beneath the deck by utilizing a combination of sensory irritants designed to trigger the raccoon's acute senses of smell, hearing, and touch.
• Place commercially available predator urine (such as coyote or fox urine) on rags or cotton balls around the interior perimeter, or scatter strong scent barriers like ammonia-soaked rags inside shallow trays.
• Install a battery-operated motion-activated sprinkler system and a high-frequency ultrasonic pest repeller, or leave a battery-operated radio playing talk radio underneath the deck continuously for 48 to 72 hours.

Step 3: The One-Way Door Eviction Test

• Once sensory deterrents have encouraged the raccoons to vacate the primary den, construct or install a professional one-way exclusion door over the main access hole.
• Ensure the spring-loaded or gravity-weighted one-way door allows raccoons to push their way out to forage for food, but firmly prevents them from pushing back inside from the exterior.
• Leave the one-way door operational for a minimum of 3 consecutive nights to guarantee all adult animals have exited the enclosed space.

Pro-Tip: Crumple up loose sheets of newspaper and block all secondary holes temporarily. If the paper remains undisturbed for three consecutive mornings, you can safely assume the area is completely vacant.

Step 4: Permanent Trenching and Hardware Cloth Installation

• Remove the one-way door and measure the entire linear perimeter of the deck to calculate the required amount of heavy-duty galvanized steel hardware cloth.
• Dig a trench around the outside edge of the deck measuring 12 inches deep and 12 inches wide to prevent raccoons and other digging pests like skunks or groundhogs from tunneling underneath the barrier.
• Secure the top edge of the hardware cloth directly to the wooden framing or rim joists of the deck using heavy-duty exterior wood screws paired with flat washers, spacing fasteners every 6 to 8 inches.
• Bend the bottom 12 inches of the hardware cloth outward at a 90-degree angle away from the deck foundation into the trench to form an L-shape apron, then backfill the trench with native soil, gravel, or paving stones.

Comparison of Raccoon Removal and Exclusion Methods

Common Site Failures and Field Fixes

• Root Cause: Raccoons bypass the shallow wire barrier by digging directly underneath an improperly anchored mesh edge.
  
  
  • Actionable Fix: Re-dig the trench to a verified depth of 12 inches minimum and ensure an outward-facing L-shape apron is installed to stop digging attempts.
• Root Cause: A female raccoon tears through flimsy chicken wire to rejoin hidden kits after a homeowner seals the deck prematurely.
  
  
  • Actionable Fix: Replace all lightweight chicken wire with heavy-gauge 1/4-inch or 1/2-inch galvanized hardware cloth, which prevents chewing and claw penetration.
• Root Cause: Raccoons return to the property because fallen tree fruit, open compost bins, or unsecured pet food remain accessible in the yard.
  
  
  • Actionable Fix: Eliminate all outdoor attractants by securing trash cans with locking lids, harvesting fallen fruit promptly, and bringing pet food indoors immediately after feeding.

Frequently Asked Questions

How do I know if there are baby raccoons under my deck?

Listen closely during the late afternoon and evening hours for high-pitched chirping, sputtering, or whimpering sounds originating from beneath the floorboards. Female raccoons are also significantly more active during daylight hours when nursing litters during spring.

Will mothballs drive raccoons out from under a deck?

No, mothballs are ineffective and illegal to use as wildlife repellents in many regions. They contain toxic chemicals like naphthalene or p-dichlorobenzene that contaminate local soil and groundwater without effectively driving out established adult raccoons.

Can I just flood the area under my deck with water?

Flooding is generally ineffective, highly stressful, and potentially damaging to your deck's structural footings and wooden supports. Raccoons can easily climb onto elevated structural members or find dry pockets to wait out the moisture.

What is the best permanent way to keep raccoons away from my deck?

The industry standard for permanent prevention is installing an underground L-shaped apron made of galvanized hardware cloth secured around the entire perimeter of the deck. This physical barrier stops both digging attempts and re-entry attempts indefinitely.

Is it legal to trap and relocate a raccoon myself?

Wildlife relocation laws vary drastically by state, province, and municipality. Many jurisdictions prohibit homeowners from relocating trapped rabies-vector species across property lines due to disease transmission risks, requiring licensed pest control professionals instead.

Protect your home and landscape by implementing professional-grade hardware cloth barriers and structural exclusion techniques to permanently secure your deck against wildlife intrusion today.