How Deep Do Iguana Burrows Go?

Iguana burrows in South Florida typically run 1 to 8 feet deep and can extend from 3 feet to nearly 80 feet long, often with several entrances. The visible opening is usually only 4 to 8 inches wide — and it is just the access point. The real concern is the hidden excavation behind it, especially near seawalls, canal banks, and foundations.

Those figures come from field measurements documented by UF/IFAS and the Florida Fish and Wildlife Conservation Commission, which notes that green iguana burrows erode and collapse sidewalks, foundations, seawalls, berms, and canal banks. There is no single depth that applies to every burrow — soil type, slope, shoreline conditions, and how long the area has been used all change the outcome.

"On waterfront jobs, the hole a homeowner shows me is almost never the whole story — a modest opening at a seawall regularly connects to a tunnel running several feet back into the bank," says Gregory Turner, the FWC-listed owner-operator of Iguana Gone Removal and Prevention. This guide explains how deep iguana burrows really go, what controls that depth, and why the visible entrance is rarely the whole problem — drawing on both published research and years of hands-on burrow work across Palm Beach and Broward Counties.

Why Burrow Depth Matters

Most people do not ask how deep iguana burrows go out of curiosity alone. They ask because they are worried about what is happening under the ground. A shallow surface disturbance is one thing. A deeper excavation near important parts of the property is something else.

How much ground is actually being disturbed
Whether the hole is part of a larger burrow system
How serious the soil stability concern may be
Whether the property is being used casually or repeatedly
How much of the problem is hidden below the visible opening

How Deep Do Iguana Burrows Actually Go?

Documented green iguana burrows range from about 1 foot to 8 feet deep (0.3 to 2.4 meters) and from 3 feet to nearly 80 feet long, with entrance holes commonly 4 to 8 inches across and often more than one entrance per system (UF/IFAS). Egg-laying nest chambers are usually shallower — around 1 foot deep and up to 3 feet long — but shelter and canal-bank burrows are where the deepest, longest excavation shows up. There is no single exact depth for every burrow, so the better question is not how many inches or feet every time. The better question is: how much hidden excavation is attached to the hole you can already see?

Depth: roughly 1 to 8 feet (0.3 to 2.4 m) in measured burrows
Length: 3 feet to nearly 80 feet, sometimes with multiple entrances
Entrance width: commonly 4 to 8 inches across
Nest burrows for eggs: shallower, about 1 foot deep and up to 3 feet long
Depth and length grow with loose soil, slope, water access, and repeated use

Why the Visible Hole Can Be Misleading

One of the biggest mistakes people make is assuming the entrance tells them everything. It does not. A burrow opening may look like one hole, one disturbed patch of dirt, one opening beside a seawall, one soft spot near landscaping, or one suspicious section near a slab edge. But below that opening, the actual burrow may extend inward, downward, or both. That is what makes these holes more concerning than random surface disturbance. The visible part is often only the access point. The real issue is the underground space created behind it. This is one reason homeowners sometimes fill or smooth over a hole only to see the disturbance return — the visible surface may be corrected temporarily, but the underlying use pattern remains.

One hole that connects to a longer horizontal tunnel inside a slope
One opening near a seawall with excavation extending toward the structure
One soft spot in a yard caused by a void forming underground
One disturbed patch near landscaping while the tunnel runs deeper into the bed
One entrance point used by multiple animals who have expanded the same system

What Influences How Deep an Iguana Burrow Goes

Not every burrow develops the same way. Several factors influence depth and extent. This is why some properties see only light digging while others develop more worrying burrow problems.

Soil conditions — loose, workable soil supports more digging than hard, compacted ground
Location — canal banks, shoreline edges, slopes, and low-disturbance corners create better digging conditions
Repeated use — ongoing iguana activity creates more established burrowing patterns than one occasional animal
Nesting pressure — if females are using the area, the digging may be more purposeful and more consequential
Protection and cover — burrows in quiet, protected areas are more likely to remain active and develop over time

Why Canal Banks and Shoreline Areas Are More Concerning

Canal-front and shoreline properties deserve extra caution because the environment often supports more than just a hole in the dirt. These areas tend to offer softer ground, sloped soil, less disturbance, nearby cover, movement routes, access to water, and repeated use of the same edges. A hole beside a canal or seawall may represent deeper excavation than the entrance suggests, instability in shoreline soil, repeat use by more than one animal, and a site functioning as part of a larger activity corridor. This is most common on canal-front properties in Boca Raton, Delray Beach, and Deerfield Beach, where waterfront conditions make repeat burrowing more likely.

Softer and more diggable ground near water edges
Sloped canal banks that support horizontal tunnel development
Lower disturbance that allows burrow systems to grow unnoticed
Repeat movement through the same shoreline zone by multiple animals
Seawall-adjacent excavation that weakens important structural soil zones

Why Deeper Burrows Matter More Near Structures

Depth becomes a more serious concern when the burrow is near houses and foundations, slab edges, patios, sidewalks, seawalls, retaining walls, pool decks, docks, landscape structures, or hardscape transitions. The issue is not just the burrow itself. It is what deeper underground excavation may do to the surrounding soil — loosened ground, voids, instability near hard surfaces, more vulnerability around edges, and repeated weakening of important areas. A shallow hole in an isolated back corner is one thing. A deeper burrow near a built feature is another.

Foundations and slab edges that depend on compacted surrounding soil
Patios, walkways, and pool decks over vulnerable ground
Seawalls where shoreline excavation can accelerate erosion
Retaining walls and landscape structures near active digging zones
Hardscape transitions where void formation creates the most visible collapse risk

Burrow Depth vs. Burrow Risk

A very deep burrow is not automatically the only type that matters. A moderate-depth burrow in the wrong place can be more concerning than a deeper one in a harmless location. What matters is the combination of depth, location, repeated use, surrounding soil condition, nearby structures, and signs of expansion or new digging. So while owners naturally focus on how deep, the more practical question is: how risky is this burrow where it is? That is the mindset that leads to better decisions.

Why Some Burrows Keep Coming Back

One of the clearest signs that depth may be part of a larger issue is recurrence. If the same area keeps showing fresh digging, loose soil, repeated openings, expanding disturbance, or reuse after being filled, the property may have more than a surface-level nuisance. That often means the burrow system is more developed than it appears, the area is still attractive to iguanas, the site is being used repeatedly, and the owner is seeing the symptom — not the full structure. This is one of the biggest reasons repeat burrows deserve more respect than one isolated opening.

How Burrow Depth Relates to Nesting

Depth matters even more when nesting may be involved. A property that supports female digging behavior is not just dealing with shelter or movement. It may be supporting reproduction. That changes the significance of the excavation considerably. Nesting-related digging is one reason owners should pay close attention when burrows appear in loose soil near landscaping, canal banks, quiet shoreline edges, low-disturbance corners, areas near shrubs or cover, or sections of the property with repeat female activity. In these cases, the issue is not just how deep the burrow goes — it is what the burrow is being used for.

Nesting burrows are often more purposefully dug and more extended
The digging is not random — it is tied to reproduction and egg protection
These burrows are more likely to be actively defended and reused
Canal banks, quiet shoreline edges, and low-disturbance corners are the highest-risk nesting zones
Nesting activity changes the significance from a nuisance concern to a reproduction management issue

Why Owners Usually Underestimate Burrow Problems Early

A lot of burrow problems are underestimated because the early signs seem small. It is just one hole. It does not look that deep. The ground still feels mostly solid. The issue is only near the edge of the property. The hole can just be filled. But the early signs are often deceptive. The visible opening may be the first clue to ongoing underground disturbance, repeat use of the same zone, a pattern connected to canal or shoreline activity, and a property that is supporting deeper excavation than expected. This is especially true on waterfront properties and community sites where quiet corners allow problems to grow without immediate visibility. Understanding what the property is offering iguanas helps explain why the same zones keep getting reused.

How to Think About Burrow Depth Without Guessing Wrong

Most property owners are not going to measure a burrow accurately, and they should not have to. The practical goal is not amateur excavation — it is pattern recognition. Instead of trying to calculate exact depth, look at the overall picture.

Where is the hole located relative to structures and shoreline features?
Is fresh soil appearing repeatedly after cleanup?
Are multiple holes visible nearby or is this isolated?
Is the area near a canal, seawall, or structural edge?
Are iguanas repeatedly visible nearby?
Does the disturbance return after being smoothed or filled?
Does the property already show signs of feeding, basking, or nesting activity nearby?

What Property Owners Often Get Wrong About Burrow Depth

Several misunderstandings show up again and again. "If the opening looks small, the burrow must be shallow" — not necessarily, the visible entrance may reveal very little about the actual underground space. "If I fill the hole once, I solved the issue" — not if the site is still being used or the underlying burrow system remains active. "Depth only matters if the hole is next to the house" — depth also matters near seawalls, canal banks, walkways, patios, retaining areas, and shared property features. "A deeper burrow is the only thing to worry about" — a moderate burrow in a bad location can still be a serious property concern. "If I do not see the iguana, the burrow is probably inactive" — burrow use and visible basking do not always happen at the same moment.

What to Do if You Suspect a Deeper Burrow

If you suspect the hole may connect to a deeper burrow, the smartest response is not casual digging — it is observation and escalation when needed. If the burrow is near a canal bank, seawall, foundation edge, walkway, patio, retaining feature, or other sensitive area, do not assume it is minor just because the opening looks manageable.

Take photos of the hole and surrounding area
Monitor for fresh soil appearing over the next several days
Note whether the disturbance expands or new holes appear nearby
Watch for repeated iguana activity in the same zone
Pay attention to nearby structures, shoreline edges, or hardscape
Note whether similar holes appear in other parts of the same area

Why Burrow Depth Near Structures Deserves More Than a Quick Look

Burrow depth matters most when the hole is near a seawall, canal bank, foundation edge, or hardscape transition. Repeated excavation in the same zone can create underground voids beneath surfaces that depend on ground stability. Professional iguana removal and control gives the most accurate picture of whether the visible entrance reflects a larger underground problem.

The hole is near a canal bank, seawall, lake edge, or shoreline feature
Fresh soil keeps appearing in the same zone after cleanup
The same area is being reused repeatedly
Multiple burrows exist in the same section of the property
The hole is near a walkway, patio, slab, retaining feature, or structure
The property has repeated iguana sightings near the same zones
You suspect nesting activity based on repeated female sightings or deep digging
The issue affects HOA or shared common areas

Our Take

Iguana burrows can go deeper than many owners assume, and the visible entrance is often the least informative part of the problem. The real question is not just depth in isolation — it is what that burrow is doing, where it is located, and what it says about the way the property is being used. If the hole is near shoreline features, structures, hardscape, or repeat iguana activity zones, it deserves more attention than most people first give it. Contact Iguana Gone Removal and Prevention to assess the burrow activity and get the right next step.

Frequently Asked Questions

How deep do iguana burrows usually go?

Documented iguana burrows range from about 1 to 8 feet deep (0.3 to 2.4 meters), according to UF/IFAS. Depth depends on soil type, slope, water access, and how long the area has been used. The visible opening often represents only a fraction of the actual underground disturbance.

How long can an iguana burrow be?

Iguana burrows can extend from about 3 feet to nearly 80 feet long, sometimes with multiple entrances feeding a single connected system. Canal banks and seawall soil tend to produce the longest tunnels because the ground is soft and rarely disturbed.

How wide is an iguana burrow entrance?

Iguana burrow entrances are commonly 4 to 8 inches across. A small entrance does not mean a small burrow — a modest-looking opening can connect to a tunnel that runs several feet inward, downward, or both.

Are deeper burrows more dangerous near structures?

Yes. The FWC reports that iguana burrows erode and collapse sidewalks, foundations, seawalls, berms, and canal banks. Burrows near houses, patios, walkways, or seawalls deserve more concern because of what the excavation does to the soil those surfaces depend on.

Do canal-front properties have deeper burrow risk?

They often do. Shoreline soil conditions, slope, cover, and repeated iguana activity make longer, deeper burrowing more likely near sensitive edges. South Florida's canal network also acts as a movement corridor that keeps reintroducing iguanas to the same banks.

When should I call a professional about a burrow?

Call when the hole is near a shoreline, structure, hardscape, or repeated iguana activity zone, when the same area keeps showing fresh digging after cleanup, or when you suspect nesting activity. These are the cases where the visible entrance most often hides a larger system.